NHTSA Complaint #11711474 — 2025 TOYOTA HIGHLANDER

I am reporting a safety defect in the 2025 Toyota Highlander Hybrid Nightshade involving the multifunction turn signal switch. The interior trim adhesive on the steering column has experienced a chemical breakdown (adhesive migration), causing the turn signal stalk to become stiff and bind. This obstruction makes it difficult to engage the turn signal and occasionally prevents the signal from "auto-canceling" after a turn. The dealership has acknowledged the adhesive failure by authorizing the replacement of the steering column covers but refuses to replace the contaminated turn signal switch. Operating a vehicle with a binding turn signal switch is a direct safety hazard, as it compromises the driver's ability to communicate intent to other motorists. Additionally, the dashboard material is experiencing systemic delamination and producing a white crystalline powder (crystallized adhesive). I am requesting an investigation into the heat-resistance standards of the interior bonding agents used in the 2025 Nightshade trim, as these materials are failing and compromising safety-critical electronic controls. Thank XXX XXX