Products Liability Law Daily Wrap Up, DESIGN AND MANUFACTURING DEFECTS—MOTOR VEHICLE EQUIPMENT—D.N.J.: UPPAbaby car seat class action dismissed for failure to plausibly plead design defect, (Jul 30, 2026)

By Wendy Biddle, J.D.

The plaintiff's allegations were too conclusory to survive Rule 12 scrutiny and insufficient to support standing for products she never purchased.

A federal district court in New Jersey dismissed all claims in a putative class action against UPPAbaby, an infant products manufacturer, holding that the plaintiff's complaint relied on conclusory labels and assumptions rather than the factual allegations required to plausibly state a claim under the Iqbal/Twombly standard. The plaintiff’s claims arose from the alleged propensity of three UPPAbaby infant car seat models to allow babies to slip into a dangerous "C-shaped" slouched position that can obstruct breathing (Jacobs v. Monahan Products, LLC, No. 1:25-cv-14538-RMB-EAH (D.N.J. July 27, 2026)).

Background. The plaintiff purchased an UPPAbaby Aria infant car seat in December 2024 as a gift for her soon-to-be-born grandson, selected from her daughter-in-law's Babylist registry after extensive online research. After her grandson was born, the grandmother was unable to position him properly in the Aria; she alleged that when she tried, he assumed a chin-to-chest, "C-shaped" position causing visible discomfort. She filed suit in August 2025, asserting claims on behalf of herself and a putative nationwide class of purchasers of not only the Aria but also two other UPPAbaby car seat models she never purchased: the Mesa V2 and the Mesa Max.

The six-count complaint alleged violations of the New Jersey Consumer Fraud Act, common law fraudulent concealment, breach of UPPAbaby's express "Product Lifetime Warranty," breach of the implied warranty of merchantability, breach of an implied warranty for a particular purpose, and unjust enrichment. The complaint also asserted warranty claims under the Magnuson-Moss Warranty Act. UPPAbaby moved to dismiss all claims under Rule 12(b)(6).

Standing. The court's threshold inquiry focused on whether the grandmother had standing to bring claims relating to car seats she never purchased. The court acknowledged that while standing ordinarily requires a plaintiff to trace her injuries to her own purchases, some courts in the Third Circuit permit class representatives to pursue claims over closely related unpurchased products under the so-called Haas exception, derived from the Third Circuit's decision in Haas v. Pittsburgh National Bank, 526 F.2d 1083 (3d Cir. 1975).

The Haas exception applies where a plaintiff demonstrates that an objectively identifiable defect pervades multiple closely related products, allowing the purchasing plaintiff to potentially represent a broader class. The court surveyed the cases in which courts in this district have applied the exception, finding they fell into two categories: mislabeled food products, where an objectively observable characteristic, such as the presence of fat in a fat-free product, is uniform across the product line; and automobiles, where a defective component, such as a windshield or battery, is shared across multiple models.

The grandmother's claims fit neither category. The court found she had not alleged any common design feature, shared component, shell, mold, seating geometry, buckle, or recline mechanism across the three car seats. Instead, she relied on the common subjective label "C-shaped" to establish both a common manifestation and a common defect. The court rejected that reasoning, noting that just as different people draw the letter C with materially different curvatures, the term "C-shaped" does not establish that infants across three differently designed car seats experienced materially identical postures, let alone a common causative defect. The court also noted that the grandmother's own complaint undermined her position by acknowledging that the Aria included a two-piece infant insert the Mesa V2 lacked, and that UPPAbaby had represented the Aria as having a distinct design from the Mesa models.

The court dismissed all claims relating to the Mesa V2 and Mesa Max, and the court limited its analysis to the Aria.

UPPAbaby's statements. The court next addressed whether eight specific statements UPPAbaby made about the Aria could support the fraud-based claims and the grandmother’s theory that UPPAbaby's advertising created an independent express warranty. Applying the rule that actionable statements must be both specific and measurable by comparative research, the court categorized the statements.

Statements that the Aria was "designed to define new standards of safety and convenience," that it "provides a safe and comfortable ride for baby," and that it offers "optimal body positioning" were found to constitute non-actionable puffery. These broad, vague, and commendatory phrases lacked the specificity and comparative measurability needed to support fraud claims or an express warranty. Other statements describing the Aria's observable physical characteristics, such as its smaller and lighter build relative to the Mesa models or the existence of a cushion insert, were found uncontested, as the grandmother did not allege those physical characteristics were false.

Two statements the court found sufficiently definite to be potentially actionable, those representing that the Aria provides an "optimized fit suitable for preemies" and that the two-piece insert "ensures proper body positioning," were nonetheless dismissed because the grandmother failed to plausibly allege they were false or that UPPAbaby had pre-sale knowledge of their falsity. The court emphasized that the grandmother's own complaint acknowledged she had found no negative reviews of the Aria before purchasing it, and that the post-sale complaints she cited, just two in total, did not specify whether the children involved were premature, whether the inserts were properly installed, or whether the positioning issue arose despite correct use of the harness and insert. Without more specific factual allegations, the court could not infer that UPPAbaby knew before the sale that these representations were false.

Fraudulent concealment, implied warranties, express warranty, and unjust enrichment. On fraudulent concealment, the court rejected the grandmother's three remaining theories. First, her assertion that UPPAbaby failed to disclose a defect failed because she had not plausibly alleged there was a defect in the Aria to begin with. Second, her contention that UPPAbaby's marketing videos showing properly positioned infants constituted fraudulent concealment was dismissed as speculative; the court found it could not infer from video evidence of a comfortable infant that UPPAbaby had staged the baby's comfort. Third, her allegations regarding UPPAbaby's discontinuation of the Mesa Max were inapplicable to the Aria, and the plaintiff lacked standing to bring claims about that product.

The court dismissed the grandmother's implied warranty of fitness for a particular purpose claim, finding she had not articulated any purpose for the Aria distinct from its ordinary purpose. She alleged the Aria's particular purpose was "safety and comfort" while its ordinary purpose was "to safely transport infants," a distinction the court found illusory.

As to the express Product Lifetime Warranty, the court found it covered only manufacturing defects, not design defects, and the grandmother herself alleged only a design defect, not a manufacturing one. The court noted that "warranties against defects in manufacturing and workmanship are distinct from warranties against design defects and do not warrant against design defects unless specifically provided."

The unjust enrichment claim failed because the grandmother purchased the Aria through Amazon, not directly from UPPAbaby, and New Jersey law requires a direct relationship between purchaser and manufacturer. Finally, the MMWA class action claim was dismissed for failure to meet the statute's requirement of at least 100 named plaintiffs, and the court declined to exercise supplemental jurisdiction over the lone MMWA claim once all other claims had been dismissed.

The case is No. 1:25-cv-14538-RMB-EAH.

Judge: Bumb, R.

Attorneys: Gary S. Graifman (Kantrowitz, Goldhamer & Graifman, PC) for Theresa Jacobs. Sharon O'Reilly (Arentfox Schiff LLP) for Monahan Products, LLC.

Companies: Monahan Products, LLC

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