Phyllis Grodzitsky v. American Honda Motor Co., Inc. ( 2020 )


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  •                  FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    PHYLLIS GRODZITSKY, on behalf of          No. 18-55417
    themselves and all others similarly
    situated; JEREMY BORDELON, on                D.C. No.
    behalf of themselves and all others       2:12-cv-01142-
    similarly situated; STEPHANIE               SVW-PLA
    MANZO, on behalf of themselves and
    all others similarly situated; SOHAL
    SHAH, on behalf of themselves and           OPINION
    all others similarly situated; JOYCE
    YOUNG; CHARITY ANYIAM; DENNIS
    MASON; JONATHAN PENDARVIS,
    Plaintiffs-Appellants,
    v.
    AMERICAN HONDA MOTOR CO.,
    INC.,
    Defendant-Appellee.
    Appeal from the United States District Court
    for the Central District of California
    Stephen V. Wilson, District Judge, Presiding
    Argued and Submitted April 8, 2019
    Pasadena, California
    Filed April 29, 2020
    2       GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    Before: Johnnie B. Rawlinson and Mary H. Murguia,
    Circuit Judges, and Jed S. Rakoff,* District Judge.
    Opinion by Judge Rawlinson;
    Dissent by Judge Murguia
    SUMMARY**
    Expert Opinion / Class Certification
    The panel affirmed the district court’s order excluding
    plaintiff’s expert opinion, and denying class certification in
    a design defect case concerning 2003–2008 Honda Pilot
    vehicles.
    The proposed class were purchasers and lessees of Honda
    Pilots who alleged that the vehicles were defectively designed
    when the regulators failed to properly support the side
    windows, rendering the windows inoperable. Plaintiff’s
    expert Glenn Akhavein opined that the window regulators
    were not sufficiently durable when exposed to vibrations at
    certain frequencies. The district court excluded the opinion as
    deficient under Daubert v. Merrell Dow Pharms., Inc., 
    509 U.S. 579
    (1993).
    *
    The Honorable Jed S. Rakoff, United States District Judge for the
    Southern District of New York, sitting by designation.
    **
    This summary constitutes no part of the opinion of the court. It has
    been prepared by court staff for the convenience of the reader.
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                 3
    The panel held that the district court properly excluded
    Akhavein’s opinion under Daubert. The district court
    properly held that Akhavein’s opinion was unreliable due to:
    Akhavein’s failure to utilize a workable standard supporting
    his design defect theory; the lack of supporting studies or
    testing to demonstrate a common design defect; and
    deficiencies in Akhavein’s methodology. The panel further
    held that in the absence of the expert report, the plaintiffs
    failed to demonstrate commonality for a putative class action,
    as the remaining evidence consisted solely of highly
    individualized complaints.
    Judge Murguia dissented. Although she agreed that the
    district court acted within its discretion in excluding certain
    parts of Akhavein’s expert testimony, she would hold that the
    district court abused its discretion when it excluded the
    testimony in its entirety, and she would reverse the district
    court’s order excluding Akhavein’s expert testimony. Judge
    Murguia would also reverse the district court’s denial of class
    certification and remand so that the district court could
    reconsider plaintiffs’ motion in light of the admissible
    portions of Akhavein’s testimony.
    COUNSEL
    Jonathan D. Selbin (argued) and Annika K. Martin, Lieff
    Cabraser Heimann & Bernstein LLP, New York, New York;
    Mark P. Chalos and Andrew R. Kaufman, Lieff Cabraser
    Heimann & Bernstein LLP, Nashville, Tennessee; Marc
    Godino, Glancy Prongay & Murray LLP, Los Angeles,
    California; Jon A. Tostrud, Tostrud Law Group P.C., Los
    Angeles, California; J. Barton Goplerud, Shindler &
    4     GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    Anderson Goplerud & Weese P.C., West Des Moines, Iowa;
    for Plaintiffs-Appellants.
    Michael L. Mallow (argued), David Carpenter, and Rachel A.
    Straus, Sidley Austin LLP, Los Angeles, California; Paul G.
    Cereghini and Robert L. Wise, Bowman and Brooke LLP,
    Torrance, California; for Defendant-Appellee.
    OPINION
    RAWLINSON, Circuit Judge:
    In this design defect case, Appellant Phyllis Grodzitsky
    (Grodzitsky), the class representative for a proposed class of
    purchasers and lessees of 2003–2008 Honda Pilot vehicles,
    appeals the district court’s order excluding her expert’s
    opinion and denying class certification. Grodzitsky alleged
    that window regulators inside Honda Pilot vehicles were
    defectively designed because the regulators failed to properly
    support the side windows, rendering the windows inoperable.
    Plaintiff’s expert Glenn Akhavein (Akhavein) opined that
    Honda window regulators were not sufficiently durable when
    exposed to vibrations at certain frequencies. We affirm the
    district court’s order excluding Grodzitsky’s expert and
    denying class certification.
    I. BACKGROUND
    In her third amended class action complaint, Grodzitsky
    alleged that the window regulators installed by Honda were
    defective because they caused windows to fall into the
    doorframes, which increased the likelihood of injuries or
    accidents. Based on the alleged defect, Grodzitsky alleged
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                    5
    causes of action for: (1) violations of California’s Consumer
    Legal Remedies Act, Cal. Civ. Code § 1750 et seq.; and
    (2) violations of California’s Unfair Competition Law, Cal.
    Bus. & Prof. Code § 17200 et seq.
    Grodzitsky initially sought certification of a class of “[a]ll
    persons in the United States who purchased or leased [one of
    seven Honda models, for model years 2000–2011, including
    the Honda Pilot] with the Window Regulator,” as well as
    various subclasses based on the residencies of the vehicle
    owners. During the course of the litigation, Grodzitsky
    narrowed the proposed class to include only individuals who
    leased or owned 2003–2008 Honda Pilots.
    In her renewed motion for class certification, Grodzitsky
    described the asserted design defect as window regulators in
    Honda Pilot vehicles that were “insufficiently strong and
    insufficiently durable to withstand the forces required to
    perform [their] intended function.” In support of her motion,
    Grodzitsky relied in part on Akhavein’s expert opinion. In
    his report, Akhavein, an engineer, explained that “[a] window
    regulator, including a Honda Pilot regulator, has a primary
    purpose of moving the window glass from where it is to
    where the user wants [it] to go and stay there.” Akhavein
    conveyed that static loading, which occurs “when the load or
    force on an object is constant,” and dynamic loading,
    involving changes in force on an object, may impact the
    efficacy of a window regulator. Akhavein opined that,
    “[b]ased on [his] comprehensive review of the failed Honda
    Pilot regulators, all appear to have failed at the ferrule-carrier
    interface, that is the portion of the carrier that supports the
    cable ferrule.”
    6     GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    According to Akhavein, dynamic loading affected the
    window regulators due to the force exerted when the vehicle
    was in motion. Akhavein stated that “[a] significant design
    mistake made by Honda, and missed or ignored by [Honda’s
    expert], is just how quickly a high number of cycles is applied
    to the carrier due to the dynamic vibrational loading that
    occurs in the Vehicle Moving state.” In other words, the
    internal mechanisms of the window regulators were
    ultimately unable to withstand the vibrations caused by the
    vehicle’s movement. Akhavein opined that “Honda did not
    adequately design the Window Regulators to be strong and
    durable enough to withstand this high-cycle dynamic
    loading.” Akhavein also explained that “[f]atigue, in this
    case caused by vibration exposure, is important as it has been
    estimated that 90% of all mechanical service failures can be
    attributed to fatigue.”
    Akhavein determined that Honda’s testing of its window
    regulators was deficient. Akhavein faulted Honda for only
    testing dynamic loading at a single, constant frequency, as
    opposed to subjecting the window regulators to a range of
    vibrational frequencies. Akhavein stated that “[t]his is crucial
    because a mechanical object can function perfectly when
    vibrated at one frequency but will tear itself apart if vibrated
    at or near its natural frequency.” Akhavein concluded that
    “[t]he Pilot Window Regulators were not adequately designed
    to [be] strong and durable enough to withstand the continual
    affects [sic] that vibration induced metal fatigue had upon the
    metal portion of the carrier to ferrule interface which is what
    supports the window.”
    During Akhavein’s deposition, Honda asked several
    questions concerning his standard for the effective
    performance of window regulators. In response, Akhavein
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                  7
    stated that window regulators “shouldn’t fail ever,” and
    agreed that, if someone owned a vehicle for thirty years, the
    “window regulator assembly should work the same way it
    worked when it was brand new . . . [i]f the car is still
    running.” Akhavein further asserted that the window
    regulator “should work for the life of the car.” Akhavein
    articulated that “[t]here’s no universal reason that a window
    regulator should fail.” Akhavein explained that the window
    regulators had a common defect because they were not
    “durable enough,” and that the standard for durability was
    that a window regulator “should last the life of the vehicle.”
    Akhavein acknowledged that there was no industry standard
    establishing that a window regulator should last for the life of
    the vehicle. Akhavein stated that his testing protocol was
    “just a real world driving around test,” and that he did not
    identify “a common solution” for resolving the defect in the
    window regulators. Akhavein did not have an opinion
    concerning the proper method that Honda should have
    utilized in designing its window regulators. Akhavein also
    acknowledged that the vibrational testing he conducted
    indicated the manner in which the window regulators
    responded to various frequencies, but there was “no direct
    correlation” with how long the part should last or whether it
    was “durable enough to perform its function[.]”
    Honda filed a motion to exclude Akhavein’s expert
    opinion, which the district court granted. The district court
    determined that Akhavein’s opinion was deficient under
    Daubert v. Merrell Dow Pharms., Inc., 
    509 U.S. 579
    (1993),
    reasoning that Akhavein’s opinion was premised on “half-
    baked, warmed-over conclusions” that Honda window
    regulators were defective “because they do not last the life of
    the vehicle, which [Akhavein] define[d] as the entire duration
    8     GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    the vehicle is on the road.” The district court excluded that
    opinion because:
    (1) Akhavein provide[d] no industry standards
    for window regulator replacement rates;
    (2) Akhavein relie[d] on no peer-reviewed
    literature relating to window regulator
    durability; (3) Akhavein provide[d] no
    information on average window regulator
    replacement rates; and ([4]) Akhavein
    provide[d] no consumer studies to substantiate
    his claim that consumers expect a window
    regulator to last forever.
    The district court observed that Grodzitsky attempted to
    recast Akhavein’s opinion by asserting that the window
    regulators were “defective from the moment they are
    installed, and that Akhavein’s claims that they should last
    forever [were] therefore irrelevant.” The district court
    rejected Grodzitsky’s attempt because “[w]ithout some
    objective basis to indicate how long the regulators should last,
    alleging that they are defective as soon as they are installed
    is simply circular – the window regulators are defective
    because they do not last as long as they should, therefore they
    are defective.”
    The district court was also unpersuaded by Akhavein’s
    opinion that the internal cable or ferrule interfaces for the
    regulators were defective. The district court opined that the
    methodology employed by Akhavein to reach this opinion
    was deficient because:
    (1) he examined an extremely small sample
    size of window regulators; (2) he does not
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                9
    know who made the regulators he examined;
    and (3) of the failed window regulators he
    inspected, he does not know if the failures
    were attributable to Plaintiffs’ theory of
    liability.
    The district court emphasized that:
    Mr. Akhavein inspected a total of 26
    regulators over the course of his investigation.
    Of these, three were sent to him by Plaintiffs
    on the instruction of Plaintiffs’ counsel, eight
    were inspected in Plaintiffs’ vehicles, ten
    came from junkyards Mr. Akhavein visited,
    and three regulators came from a test vehicle.
    Not all of these regulators had failed when
    Mr. Akhavein inspected them. In fact, only
    roughly a dozen had failed. . . . This means
    Mr. Akhavein has no information whatsoever
    regarding why the other failed regulators in
    class vehicles failed. He is essentially
    extrapolating from the 12 failed regulators he
    inspected to draw conclusions about the
    441,600 regulators installed in class vehicles.
    This is insufficient.
    The district court articulated that, although Grodzitsky
    maintained that statistical significance was irrelevant in
    design defect actions, Akhavein framed his opinion in terms
    of probabilities without an adequate methodology supporting
    his assessment that it was “more likely than not that a failed
    Honda regulator . . . failed because of this design defect.”
    10    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    The district court similarly rejected Akhavein’s opinion
    that Honda’s vibration testing was defective because it was
    conducted at only one frequency. The district court
    determined that Akhavein’s vibration testing did not support
    his opinion because “he conducted no durational testing to
    confirm that these additional frequencies cause the regulators
    to fail when they are exposed to those frequencies over time.”
    The district court opined that Akhavein failed to demonstrate
    that his testing would have identified the defect relative to the
    tests performed by Honda.
    Finally, the district court held that “[t]he exclusion of
    Mr. Akhavein’s testimony [was] fatal to Plaintiffs’ motion for
    class certification,” because “without this testimony Plaintiffs
    [were] unable to meet the requirements of Rule 23.” The
    district court reasoned that, without Akhavein’s opinion, the
    plaintiffs were unable to demonstrate the requisite
    commonality because “[a]ll they have is a series of window
    regulators that may or may not have broken before they were
    supposed to, and these breakages may or may not have been
    caused by a common defect which may or may not exist.”
    We granted Grodzitsky’s petition for permission to appeal
    the district court’s order.
    II. STANDARDS OF REVIEW
    We review the district court’s exclusion of Akhavein’s
    expert opinion and the resulting denial of class certification
    for an abuse of discretion. See Crowley v. Epicept Corp.,
    
    883 F.3d 739
    , 752 (9th Cir. 2018) (expert opinion); see also
    Sandoval v. Cnty. of Sonoma, 
    912 F.3d 509
    , 515 (9th Cir.
    2018) (denial of class certification).
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                 11
    “A class certification order is an abuse of discretion if the
    district court applied an incorrect legal rule or if its
    application of the correct legal rule was based on a factual
    finding that was illogical, implausible, or without support in
    inferences that may be drawn from the facts in the
    record. . . .” 
    Sandoval, 912 F.3d at 515
    (citation and internal
    quotation marks omitted).
    III.    DISCUSSION
    Grodzitsky contends that the district court erred in
    excluding Akhavein’s expert opinion because his opinion was
    reliable, relevant, and comported with the admissibility
    standards established in Daubert.
    The district court did not abuse its discretion in excluding
    Akhavein’s opinion. “[I]n evaluating challenged expert
    testimony in support of class certification, a district court
    should evaluate admissibility under the standard set forth in
    Daubert. . . .” Sali v. Corona Reg’l Med. Ctr., 
    909 F.3d 996
    ,
    1006 (9th Cir. 2018), as amended (citation omitted). Under
    Daubert, “the district court judge must ensure that all
    admitted expert testimony is both relevant and reliable.”
    Wendell v. GlaxoSmithKline LLC, 
    858 F.3d 1227
    , 1232 (9th
    Cir. 2017) (citation omitted). “Scientific evidence is reliable
    if the principles and methodology used by an expert are
    grounded in the methods of science.”
    Id. (citation and
    internal quotation marks omitted). “The focus of the district
    court’s analysis must be solely on principles and
    methodology, not on the conclusions that they generate,” and
    “the court’s task is to analyze not what the experts say, but
    what basis they have for saying it.”
    Id. (citations, alteration,
    and internal quotation marks omitted). In conducting this
    analysis, the district court may consider “whether the theory
    12    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    or technique employed by the expert is generally accepted in
    the scientific community; whether it’s been subjected to peer
    review and publication; whether it can be and has been tested;
    and whether the known or potential rate of error is
    acceptable.”
    Id. (citation omitted).
    The district court properly excluded Akhavein’s opinion
    under Daubert. Although Grodzitsky vigorously attempts to
    disassociate her design defect claim from the standard
    utilized by Akhavein during his deposition, Grodzitsky’s
    recasting of Akhavein’s opinion is unavailing. In his
    deposition, Akhavein faulted Honda’s design for its window
    regulators because the window regulators “shouldn’t fail
    ever.” This was not a passing observation by Akhavein.
    Instead, he stated that “a window regulator assembly should
    work the same way it worked when it was brand new,” the
    window regulator “should work for the life of the car,” there
    was “no universal reason that a window regulator should
    fail,” if an owner operated the vehicle for thirty years, the
    “window regulator assembly should work the same way it
    worked when it was brand new,” the window regulators had
    a common defect because they were not “durable enough,”
    and the applicable standard for durability was that the
    regulators “should last the life of the vehicle.” Although
    Grodzitsky maintains that Akhavein’s opinion was premised
    on his determination that the regulators were defective
    because they lacked the requisite strength and durability to
    withstand force produced during the vehicle’s operation, this
    assertion elides the life-of-the-vehicle defect design theory
    permeating Akhavein’s deposition testimony.
    Moreover, the methodological flaws in Akhavein’s
    opinion were not limited to his overly expansive standard for
    a design defect. Indeed, Akhavein admitted that he failed to
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                13
    identify a common solution to the defect, but relied on “just
    a real world driving around test.” Additionally, Akhavein
    explained in his rebuttal report that he examined only twenty-
    six Honda Pilot window regulators. Akhavein stated that:
    Of the 26 regulators that [he had] seen, . . .
    [f]our of them were sent to [him] directly by
    the named Plaintiffs . . . 9 of them were on
    Plaintiffs’ Vehicles whose inspection pictures
    [he] reviewed, 10 of them are Regulators [he]
    removed from Class Vehicles [he] found at
    random in Florida salvage yards, and 4 are
    Regulators from the test vehicles used by
    Honda’s expert[.]
    In addition to utilizing this small sample size to prove a
    common defect in over 400,000 window regulators for class
    vehicles, Akhavein acknowledged that there was “no direct
    correlation” between his vibrational testing and failure of the
    window regulators. Akhavein further conceded that he did
    not conduct a comparison with window regulators from other
    manufacturers, and did not review any industry data
    concerning replacement rates for window regulators. Finally,
    Akhavein confirmed that he did not “have an opinion on what
    [Honda] should have done” in designing a proper window
    regulator.
    The dissent fully acknowledges that the district court
    properly excluded Akhavein’s opinion that the regulators
    should have lasted the life of the vehicle, the crux of
    Akhavein’s defect theory, and that Akhavein entirely failed
    to cite industry standards, peer-reviewed literature, or even
    “test a statistically significant number of regulators to opine
    on the probabilities that any given Honda Pilot regulator
    14    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    failed because of the alleged defect.” Dissenting Opinion,
    p. 18. Nevertheless, the dissent unsuccessfully attempts to
    salvage Akhavein’s deeply flawed opinion by artificially
    separating Akhavein’s fatally flawed opinion into a series of
    opinions, including some based on “first-hand observations
    and testing.”
    Id. at p.
    19. However, as the district court
    noted, Akhavein articulated no scientific basis for his
    observations. And the only testing he performed was not
    designed to identify any defects, let alone a common defect.
    See, e.g., Cates v. Whirlpool Corp., No. 15-CV-5980, 
    2017 WL 1862640
    at *12 (N.D. Ill. May 9, 2017) (excluding an
    expert opinion in the class certification context based on the
    expert’s “merely point[ing] to an undifferentiated mass of
    potential problems”). In other words, identification of
    general “potential problems” in the absence of the
    identification of a specific defect present in all the regulators
    did not constitute “an opinion that fits Plaintiffs’ class-
    certification argument.”
    Id. (citation omitted).
    See Ellis v.
    Costco Wholesale Corp., 
    657 F.3d 970
    , 982 (9th Cir. 2011)
    (explaining that “Daubert does not require a court to admit or
    to exclude evidence based on its persuasiveness; rather it
    requires a court to admit or exclude evidence based on its
    scientific reliability and relevance. Thus, an expert’s
    inference or assertion must be derived by the scientific
    method to be admissible.”) (citations and internal quotation
    marks omitted). The dissent’s reliance on Akhavein’s
    generalized opinion, while ignoring its acknowledged flaws,
    does not comport with our standards for assessing expert
    opinions. See
    id. According to
    the dissent, if Akhavein could cobble
    together some form of generalized opinion, even one riddled
    with scientific and methodological flaws, the district court
    would abuse its discretion in not accepting that opinion. See
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                15
    Dissenting Opinion, pp. 19–21. Relying on this premise, the
    dissent contends that the district court should reconsider its
    denial of class certification based on “the admissible portions
    of Akhavein’s testimony.”
    Id. at p.
    22. However, we have
    recognized that a district court errs when it “limit[s] its
    analysis of whether there was commonality to a determination
    of whether Plaintiffs’ evidence on that point was admissible.”
    
    Ellis, 657 F.3d at 982
    . Instead, the district court must engage
    in a “rigorous analysis” of commonality, rather than “merely
    conclud[ing] that, because . . . evidence was admissible, a
    finding of commonality was appropriate.”
    Id. at 984.
    The district court conducted the requisite “rigorous
    analysis” in determining that Grodzitsky was unable to
    demonstrate commonality.          Contrary to the dissent’s
    contention, Akhavein did not proffer an opinion based on
    “general product engineering principles” completely
    untethered from the scientific and methodological flaws
    identified by the district court. Dissenting Opinion, p. 20. In
    his own testimony, Akhavein stated that the regulators had a
    “common defect” because they were not “durable enough” to
    “last the life of the vehicle,” conceded that he was unable to
    identify a “common solution” to the purported defects in the
    regulators, and confirmed that he had no opinion concerning
    the proper manufacturing method that should have been
    utilized by Honda. Finally, his vibration testing provided “no
    direct correlation” to the durability of the regulators. Due to
    these concessions, Akhavein did not and could not provide a
    reliable opinion demonstrating a common defect for over
    400,000 regulators. See 
    Ellis, 657 F.3d at 982
    –84; see also
    
    Wendell, 858 F.3d at 1232
    (reminding us that the focus is
    “solely” on “principles and methodology, not on the
    conclusions they generate”) (citation omitted). We “analyze
    not what the experts say, but what basis they have for saying
    16    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    it.” 
    Wendell, 858 F.3d at 1232
    (citation omitted). The district
    court in this case properly performed its gatekeeping function
    in assessing Akhavein’s proffered opinion and concluding
    that the opinion was not predicated on reliable scientific
    methodology. See
    id. The dissent’s
    reliance on McKendall v. Crown Control
    Corp., 
    122 F.3d 803
    (9th Cir. 1997) is misplaced. See
    Dissenting Opinion, pp. 20–21. In that case, which was a
    products liability action “for injuries incurred when a sofa fell
    on [the plaintiff] while he was operating [a] forklift,” we held
    that the expert’s “testimony, based on his engineering
    experience and his having investigated hundreds of fork lift
    cases over the past thirty years, that a safety device is
    feasible, [was] both facially helpful and relevant and
    seemingly reliable.” 
    McKendall, 122 F.3d at 804
    , 807
    (citation and internal quotation marks omitted). We did not
    hold that an engineer’s generalized opinion suffering from
    severe methodological and scientific flaws was otherwise
    reliable.    Moreover, we have since recognized that
    McKendall’s holding that “the Daubert factors are relevant
    only to testimony bearing on scientific knowledge and did not
    apply to an expert testifying on how a product ought to have
    been designed” has been overruled. See White v. Ford Motor
    Co., 
    312 F.3d 998
    , 1007 (9th Cir. 2002). Thus, McKendall
    provides little assistance in salvaging Akhavein’s opinion.
    Neither do United States v. Laurenti, 
    611 F.3d 530
    (9th
    Cir. 2010) and United States v. Finley, 
    301 F.3d 1000
    (9th
    Cir. 2002) compel a finding that the district court abused its
    discretion in this case. See Dissenting Opinion, p. 21. In
    Laurenti, a criminal prosecution for securities fraud, we
    concluded that the district court erred in excluding testimony
    concerning National Association of Securities Dealers rules
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                17
    and the expert’s “general knowledge of the industry as a
    
    whole.” 611 F.3d at 548
    . In Finley, we held that the district
    court erred in excluding the entirety of an expert’s testimony
    in a criminal case as a discovery sanction under Federal Rule
    of Criminal Procedure 16(d)(2). 
    See 301 F.3d at 1018
    .
    Because these cases did not address a deeply flawed and
    unsupported expert opinion offered in the context of the
    rigorous analysis applied to assess commonality for a putative
    class action, they are unpersuasive on this point. Finally, our
    opinion in Wolin v. Jaguar Land Rover N. Am., LLC,
    
    617 F.3d 1168
    (9th Cir. 2010), lends no assistance to the
    dissent’s position. In that case, the existence of a defect was
    undisputed. See
    id. at 1170–71
    (focusing on whether the
    defect was common rather than on the existence of a defect).
    IV.     CONCLUSION
    The district court did not abuse its discretion in excluding
    Akhavein’s expert opinion under Daubert. The district court
    properly held that Akhavein’s opinion was unreliable due to
    Akhavein’s failure to utilize a workable standard supporting
    his design defect theory; the lack of supporting studies or
    testing to demonstrate a common design defect; and
    deficiencies in Akhavein’s methodology.
    In the absence of the report, the plaintiffs failed to
    demonstrate commonality, as the remaining evidence
    consisted solely of highly individualized complaints.
    AFFIRMED.
    18    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    MURGUIA, Circuit Judge, dissenting:
    Although I agree that the district court acted within its
    discretion in excluding certain parts of Akhavein’s expert
    testimony, the district court abused its discretion when it
    excluded the testimony in its entirety, the admissible portions
    of which may have critically supported Plaintiffs’ motion for
    class certification. I would therefore reverse the district
    court’s order excluding Akhavein’s expert testimony.
    To be sure, for many of the reasons identified by the
    majority, the district court did not abuse its discretion in
    excluding portions of Akhavein’s testimony. The properly
    excluded portions included Akhavein’s opinion that
    regulators should last the life of the vehicle, Akhavein’s
    views on the probabilities that any given failure is due to the
    alleged defect, and Akhavein’s opinion that the alleged defect
    in fact caused the regulators he examined to fail. In rendering
    these opinions, Akhavein failed to, among other things, cite
    any industry standards for normal or expected regulator
    replacement rates, cite any peer-reviewed literature regarding
    regulator durability, and test a statistically significant number
    of regulators to opine on the probabilities that any given
    Honda Pilot regulator failed because of the alleged defect.
    The district court, however, abused its discretion when it
    failed to separate these opinions from the remainder of
    Akhavein’s report, choosing instead to exclude Akhavein’s
    testimony in its entirety. See Reed v. Lieurance, 
    863 F.3d 1196
    , 1208–09 (9th Cir. 2017) (“While the district court may
    have had a proper basis to exclude portions of the expert
    report in its discretion, . . . the district court abused its
    discretion in excluding the entirety of [the expert’s]
    testimony[.]”). There is no dispute that Akhavein—an
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                  19
    engineer with twenty-five years of education and training—is
    qualified to opine on product design and forensic engineering.
    See City of Pomona v. SQM N. Am. Corp., 
    750 F.3d 1036
    ,
    1044 (9th Cir. 2014) (“[Expert testimony] is reliable if the
    knowledge underlying it has a reliable basis in the knowledge
    and experience of the relevant discipline.” (quoting Primiano
    v. Cook, 
    598 F.3d 558
    , 565 (9th Cir. 2010))). Nevertheless,
    the district court went too far when it excluded even those of
    Akhavein’s opinions that were rooted in first-hand
    observations and testing—including his opinion that the
    regulators were designed in a way that made them susceptible
    to failure as well as his basic opinion regarding the
    vibrational frequencies that the regulators would be exposed
    to with normal vehicle use. These opinions—“conclusion[s]
    from a set of observations based on extensive and specialized
    experience”—have a reliable basis and would be helpful to a
    jury tasked with assessing whether the regulators are
    defective. Kumho Tire Co. v. Carmichael, 
    526 U.S. 137
    , 156
    (1999); see Sali v. Corona Reg’l Med. Ctr., 
    909 F.3d 996
    ,
    1006 (9th Cir. 2018) (“[I]n evaluating challenged expert
    testimony in support of class certification, a district court
    should evaluate admissibility under the standard set forth in
    Daubert.”); City of 
    Pomona, 750 F.3d at 1043
    –44 (“Under
    Daubert and its progeny . . . ‘[t]he district court is not tasked
    with deciding whether the expert is right or wrong, just
    whether his testimony has substance such that it would be
    helpful to a jury.’” (quoting Alaska Rent-A-Car, Inc. v. Avis
    Budget Group, Inc., 
    738 F.3d 960
    , 969–70 (9th Cir. 2013))).
    The majority argues that these opinions are—like the
    others—“riddled with scientific and methodological flaws.”
    But the majority fails to convincingly explain why
    Akhavein’s observations about the design of Honda Pilot
    regulators and the normal-use vibrational frequencies that the
    20    GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    regulators would be exposed to—which, again, are rooted in
    his twenty-five years of education and training in the field of
    engineering— are “fatally flawed.” While the majority
    contends that these observations had “no scientific basis,” it
    notably fails to explain with any level of specificity how it
    comes to that conclusion. Rather, the majority comes to its
    conclusion by indiscriminately lumping these opinions
    together with the above-mentioned defective opinions,
    seemingly concluding that a few bad apples must mean that
    the whole barrel is rotten. But contrary to the majority’s
    contention, there is nothing “artificial” about declining to
    exclude an expert’s testimony wholesale simply because
    some of his opinions are flawed.
    The majority unpersuasively cites as an example of
    Akhavein’s “fatally flawed” opinion Akhavein’s examination
    of “only twenty-six Honda Pilot window regulators” “to
    prove a common defect in over 400,000 window regulators
    for class vehicles[.]” But as the district court explained,
    Akhavein’s failure to test a statistically significant number of
    regulators posed a problem only to Akhavien’s opinion
    regarding the probability that a given regulator failed because
    of the alleged defect. That is, Akhavein does not need to test
    a statistically significant number of regulators to give his
    general observations and conclusions about the design of
    Honda Pilot regulators. Additionally, the majority cites
    Akhavein’s acknowledgment of the lack of direct correlation
    between his vibrational testing and failure of the regulators.
    But this does not undermine Akhvein’s opinion that—as a
    matter of general product engineering principles—products
    should be designed with the vibrational frequencies they are
    expected to experience in mind, and that Honda failed to take
    this into account. See McKendall v. Crown Control Corp.,
    
    122 F.3d 803
    , 807 (9th Cir. 1997) (“[The expert] reached his
    GRODZITSKY V. AMERICAN HONDA MOTOR CO.                  21
    expert conclusions by drawing upon general engineering
    principles and his twenty-two years of experience as an
    automotive engineer.” (quoting Compton v. Subaru of Am.,
    Inc., 
    82 F.3d 1513
    , 1519 (10th Cir. 1996))).
    While Akhavein’s admissible opinions may not alone
    definitively establish that the regulators are defective,
    Plaintiffs do not need to demonstrate that they will prevail on
    the merits to satisfy commonality; they need only show that
    a classwide proceeding would “generate common answers apt
    to drive the resolution of the litigation.” Torres v. Mercer
    Canyons Inc., 
    835 F.3d 1125
    , 1133 (9th Cir. 2016) (emphasis
    omitted) (quoting Wal-Mart Stores, Inc. v. Dukes, 
    564 U.S. 338
    , 350 (2011)); Wolin v. Jaguar Land Rover N. Am., LLC,
    
    617 F.3d 1168
    , 1172 (9th Cir. 2010) (finding that plaintiffs
    “easily satisf[ied] the commonality requirement” because
    each class member’s claim involved “the same alleged defect,
    covered by the same warranty, and found in vehicles of the
    same make and model”).
    For these reasons, the district court abused its discretion
    when it excluded the entirety of Akhavein’s expert testimony,
    an error that cannot be construed as harmless. United States
    v. Laurienti, 
    611 F.3d 530
    , 548 (9th Cir. 2010) (finding
    district court’s erroneous exclusion of expert testimony
    harmless because, “[u]nlike in many cases, where the district
    court prohibits all testimony by a proffered expert, the district
    court here permitted testimony by [the expert] on a wide
    range of topics and sustained objections only to a limited set
    of questions”); United States v. Finley, 
    301 F.3d 1000
    , 1018
    (9th Cir. 2002) (holding that the exclusion of expert
    testimony was not harmless because it was “the only evidence
    of [defendant’s] diagnosed mental disorder, and the [district]
    court excluded the entire testimony”).
    22     GRODZITSKY V. AMERICAN HONDA MOTOR CO.
    Finally, because the district court explicitly denied class
    certification on the basis that “[w]ithout [Akhavein’s]
    testimony, Plaintiffs have no way of demonstrating the
    commonality required by Rule 23,” I would also reverse the
    district court’s denial of class certification and remand so that
    the district court could reconsider Plaintiffs’ motion in light
    of the admissible portions of Akhavein’s testimony.
    Therefore, with respect, I dissent.