MAYWALD v. TOYOTA

The Arizona Supreme Court, in *Maywald v. Toyota Motor Corporation*, clarified the two-pronged test for strict product liability claims involving design defects. The Court ruled that plaintiffs must first prove a product is defective before demonstrating that the defect renders it unreasonably dangerous. In the context of automotive safety, the Court held that the absence of an optional safety feature, such as a Lane Departure Warning (LDW) system, does not inherently make a vehicle defectively designed. This decision emphasizes that drivers retain primary responsibility for vehicle operation and that assistive technologies do not negate this duty. The ruling reinforces a manufacturer's liability hinges on the product's inherent design flaws rather than the omission of every conceivable safety enhancement, thereby providing significant guidance for product liability litigation in Arizona.

The Arizona Supreme Court recently delivered a significant ruling in *Shawn Maywald, et al. v. Toyota Motor Corporation, et al.*, a case that profoundly impacts the landscape of strict product liability law, particularly concerning design defects in the automotive industry. The unanimous decision, authored by Justice James P. Beene, clarified the essential elements plaintiffs must prove to establish a design defect claim under Arizona law. This case arose from a tragic automobile collision where the plaintiffs alleged that a 2019 Toyota 4Runner was defectively designed due to its lack of a Lane Departure Warning (LDW) system.

This article will delve into the Supreme Court's reasoning, examining its reaffirmation of the two-step inquiry for strict product liability claims and its implications for manufacturers and consumers alike. For practitioners, *Maywald v. Toyota* provides critical guidance on the burden of proof in design defect cases, particularly when the alleged defect involves the absence of advanced safety features. The Court's emphasis on driver responsibility and its interpretation of what constitutes a "defective" product will shape future litigation strategies in product liability actions across the state.

Product liability law in Arizona is primarily governed by a combination of common law principles and statutory provisions found in Article 9 of Chapter 6, Title 12 of the Arizona Revised Statutes (A.R.S. §§ 12-681 through 12-690). These laws allow for claims based on strict liability, negligence, and breach of warranty. For strict product liability, a plaintiff must generally prove that the product was in a defective condition, unreasonably dangerous, and that the defect caused injury while the product was being used in a reasonably foreseeable manner.

Design defect claims, as opposed to manufacturing defects or failure-to-warn claims, allege that the product, despite being manufactured as intended, is inherently dangerous due to its design. Arizona courts have historically applied both the "consumer expectation test" and the "risk/benefit analysis" to evaluate whether a product's design is unreasonably dangerous. The consumer expectation test asks whether the product failed to perform as safely as an ordinary consumer would expect. The risk/benefit analysis, often applied in more complex cases, weighs the risks of the design against its benefits. The *Maywald* case specifically addressed the application and sequence of these tests, particularly when a plaintiff asserts that a product is defective for lacking a safety feature present in later models or competing products.

The *Maywald* case originated from a 2019 collision where a driver of a Toyota 4Runner fell asleep, crossed the center line, and struck the Maywalds' vehicle. The plaintiffs contended that the 2019 4Runner was defectively designed because it did not include a Lane Departure Warning (LDW) system, a feature that Toyota incorporated into its 2020 models. The superior court granted summary judgment for Toyota, but the court of appeals reversed, concluding that a risk/benefit analysis applied and that genuine issues of material fact existed regarding the design defect.

The Arizona Supreme Court, however, vacated the court of appeals' decision and affirmed the trial court's judgment in favor of Toyota. The Court unequivocally clarified that a plaintiff in a strict product liability claim must satisfy a two-part test: first, proving the product was *defective*, and second, proving that the defect made the product *unreasonably dangerous*. This sequential requirement is crucial, as the "unreasonably dangerous" inquiry only becomes relevant once a defect has been established.

Central to the Court's reasoning was its determination that the absence of an LDW system in the 2019 4Runner did not render the vehicle defective. The Court emphasized that drivers bear the primary responsibility for safely operating their vehicles, and advanced safety features like LDW systems are designed to assist drivers, not to replace their fundamental duty to remain alert and maintain control. The Court further elucidated that when evaluating whether a product is unreasonably dangerous, courts should assess the risks and benefits of the product *as it was actually designed and sold*, rather than comparing it to a hypothetical product with additional or superior safety features. This approach prevents manufacturers from being held liable simply because a safer design or technology became available later or was offered by a competitor, unless the original design itself was inherently flawed and unreasonably dangerous at the time of sale. The ruling effectively reinforces the principle that a product is not defective merely because it could have been made safer.

The Arizona Supreme Court's decision in *Maywald v. Toyota Motor Corporation* provides critical clarity for attorneys navigating strict product liability claims, particularly those involving allegations of design defects. The reaffirmation of the two-step requirement—first proving a defect, then proving it is unreasonably dangerous—establishes a higher bar for plaintiffs, especially when the alleged defect is the absence of an optional or later-developed safety feature. This ruling underscores the judiciary's stance that manufacturers are not insurers against all possible accidents and that consumer responsibility for product use remains paramount.

Practitioners should advise clients that simply pointing to the existence of a more advanced safety feature in a newer model or a competitor's product will likely be insufficient to establish a design defect. Instead, the focus must be on whether the product, as designed and sold, was inherently defective and unreasonably dangerous. This decision may lead to more rigorous expert analysis in design defect cases, requiring plaintiffs to demonstrate a fundamental flaw in the product's original design rather than merely suggesting a safer alternative. Attorneys should carefully review the specific design choices and the prevailing industry standards at the time of manufacture when assessing the viability of such claims.