NHTSA Complaint #11439671 — 2021 TOYOTA COROLLA

The problem seems to occur when activating the Full-Speed Range Dynamic Radar Cruise Control (DRCC) feature, as detailed next. During a recent trip, the car behaved in a potentially dangerous, life-threatening manner when the DRCC function was activated. Specifically, the car seems to increase the RPM of the engine to dangerous levels when going down a slope even if there is a speed limit set using the cruise control. In other words, the car does not change gear properly to keep the RPM in normal ranges. The engine’s RPM getting close, entering the red zone indicated by the RPM tachometer, and staying there even for seconds may cause an engine explosion which at highway speeds can be extremely dangerous for the passengers and other nearby vehicles on the road.