General Motors faces federal probe over eBoost braking system failures

The National Highway Traffic Safety Administration (NHTSA) has escalated its investigation into General Motors (GM) to an ‘engineering analysis’ regarding potential failures in the eBoost electronic brake-by-wire system. The probe affects more than 1.1 million vehicles, including electric models produced in alliance with Honda and Acura, as well as internal combustion vehicles such as the Chevy Colorado, GMC Canyon, and various Buick models.

Investigations began following numerous consumer complaints, including reports from 2023 Cadillac Lyriq owners regarding ‘rock-hard’ brake pedals and ‘Brake System Failure’ warnings. While GM has acknowledged a hardware flaw involving a metallic spindle within the eBoost assembly that is susceptible to fracture, the company maintains that secondary safety systems remain functional until the vehicle stops. However, federal investigators noted that consumer reports often contradict this, alleging an immediate loss of brake assist while the vehicle is in motion, which significantly increases stopping distances.

If the engineering analysis confirms the defect, it could lead to a massive market recall. The case is drawing significant attention from the global automotive industry due to its implications for the reliability of electronic braking systems in next-generation electric vehicles.