● Covered by 2 sources · 2 reportsMedium impact2 negative
NHTSA increases scrutiny on GM EV brake problems after hundreds of incidents
Key points
- NHTSA upgraded its probe into GM brake issues to an "engineering analysis."
- Over 1 million GM vehicles, including EVs, may be affected.
- Hundreds of incidents, 20+ crashes/fires, and 6+ injuries reported.
- Problem linked to GM's eBoost brake-by-wire system.
- Investigation includes GM vehicles built for Honda and Acura.
- Problem is a spindle fracture in the eBoost brake-by-wire system.
- NHTSA received 227 incident reports, 745 including those reported to GM.
Increased Federal Scrutiny on GM Brakes
The National Highway Traffic Safety Administration (NHTSA) has escalated its investigation into brake problems in General Motors (GM) vehicles, including electric vehicles (EVs) and some non-EV models. This upgrade to an "engineering analysis" is the highest level of investigation performed by NHTSA's Office of Defects Investigation (ODI) and often precedes a recall recommendation. The probe follows hundreds of reported incidents, over 20 crashes or fires, and at least six injuries.
Affected Vehicles and Reported Issues
The brake issues affect more than one million vehicles, including popular GM EVs like the Cadillac Lyriq, Blazer EV, Equinox EV, and models built in partnership with Honda such as the Honda Prologue and Acura ZDX. Non-EV models like the Chevy Colorado, GMC Canyon, Buick Enclave, and Envision are also implicated. Initial complaints described a "Brake System Failure" message upon vehicle startup or after stopping, while later reports detailed an "immediate loss of brake assist" during braking, potentially increasing stopping distances and crash risk.
The eBoost System Under Investigation
GM's eBoost brake-by-wire system, introduced in 2019, is at the center of the investigation. This system replaces the traditional mechanical link between the brake pedal and the braking system with an electronic one. GM had previously attributed the problem to fractures in the spindle of the eBoost system, but ODI's continued receipt of reports inconsistent with this explanation has prompted a deeper analysis into potential failures within the eBoost system itself.
Updates
- Investigation includes GM vehicles built for Honda and Acura.
- Problem is a spindle fracture in the eBoost brake-by-wire system.
- NHTSA received 227 incident reports, 745 including those reported to GM.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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How outlets covered it
The federal government is expanding a safety investigation into over 1.1 million General Motors vehicles, including electric models and those built for Honda and Acura, due to hundreds of reports of brake-by-wire system failures. The National Highway Traffic Safety Administration (NHTSA) has received reports contradicting GM's claim that critical safety features remain operational after a failure, with some incidents alleging immediate loss of braking.
The National Highway Traffic Safety Administration (NHTSA) has upgraded its investigation into brake problems affecting over one million General Motors (GM) vehicles, including EVs, to an "engineering analysis." This escalation follows hundreds of reported incidents, over 20 crashes or fires, and at least six injuries, indicating a potential widespread safety defect in GM's eBoost brake-by-wire system.