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NHTSA expands probe into GM eBoost brake system covering 1.1 million vehicles

Federal regulators have broadened a safety investigation into General Motors' eBoost brake-by-wire system after receiving hundreds of complaints. The system, used across more than 1.1 million vehicles including GM EVs and models built for Honda and Acura, can suffer a spindle fracture that some drivers say causes immediate, total loss of braking rather than the gradual degradation GM claims should occur.

arstechnica.com · 2026-08-24

NHTSA escalates probe into GM's eBoost brake system after crashes, injuries

The National Highway Traffic Safety Administration has upgraded its investigation of brake failures in GM's eBoost brake-by-wire system to an engineering analysis, its most serious pre-recall step. The probe covers over 1 million vehicles, including Cadillac Lyriq EVs built with Honda, plus Chevy Colorado, GMC Canyon, Buick Enclave and Envision models, following hundreds of complaints, over 20 crashes or fires, and at least six injuries.

techcrunch.com · 2026-08-24