The National Highway Traffic Safety Administration (NHTSA) is broadening its safety investigation into a significant number of General Motors (GM) vehicles due to numerous reports of brake failures. This issue impacts more than 1.1 million vehicles, including various GM electric models and those manufactured for Honda and Acura.
The core of the problem lies within the brake-by-wire system, referred to by GM as eBoost. This system is susceptible to a spindle fracture while in operation. GM asserts that, should such a fracture occur, the vehicle should maintain several essential safety features, including antilock brakes, traction control, and stability control, until the vehicle comes to a complete stop. However, the NHTSA’s Office of Defects Investigation (ODI) has received numerous reports that contradict GM’s claims, indicating that failures of the eBoost system may lead to an immediate loss of braking capability, which poses a serious safety hazard.
To date, the NHTSA has documented 227 incident reports, a figure that escalates to 745 when including additional occurrences reported directly to GM. Among these incidents, there have been 22 crashes, with six individuals sustaining injuries across five of these accidents. Fortunately, there have been no reported fatalities associated with these brake failures.
The vehicles identified as being equipped with the eBoost system include the following models: the 2023-2026 Cadillac Lyriq, Chevrolet Colorado, and GMC Canyon; the 2024-2026 Buick Enclave, Envision, Chevrolet Blazer EV, Equinox EV, Traverse, Cruise Origin, and GMC Acadia; as well as the 2025-2026 Cadillac Celestiq and Optiq. Additionally, the investigation is aware of the 2024-2026 Acura ZDX and 2024-2026 Honda Prologue models that also utilize this braking system.
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