The U.S. safety regulator has escalated its probe into General Motors’ electric vehicles after dozens of brake‑system failures, crashes and injuries, potentially affecting over a million cars. Drivers have reported sudden loss of brake assist, forcing some to steer into curbs to avoid catastrophic collisions.
- NHTSA upgraded the investigation to an engineering analysis.
- More than 1 million GM vehicles, both EVs and some gasoline models, may be affected.
- Drivers have experienced an immediate loss of brake assist, leading to dangerous manual maneuvers.
The U.S. National Highway Traffic Safety Administration (NHTSA) began probing General Motors (GM) after owners of 2023‑model Cadillac Lyriq reported brake‑system alerts. In April 2024 the agency’s Office of Defects Investigation (ODI) announced it is upgrading the case to an “engineering analysis,” the highest level before a possible recall.
The issue is not limited to EVs. Non‑EV models such as the Chevrolet Colorado, GMC Canyon, Buick Enclave and Envision are also showing similar brake‑by‑wire failures. GM’s eBoost system replaces the traditional mechanical link between the pedal and the brakes with an electronic signal, allowing the company to alter brake feel across different driving modes.
Multiple incidents illustrate the danger. In a 2025 Cadillac Lyriq, the driver lost braking while pulling into a parking space, drove over a curb and crashed through a storefront, ending up “mid‑way inside the store among furniture.” In a 2024 Blazer EV, the driver said they had to “deliberately steer the vehicle into a concrete curb” to slow down and avoid a “catastrophic intersection collision.”
These reports extend to gasoline‑powered trucks and SUVs, raising the potential recall pool to over one million vehicles. ODI noted that an “immediate loss of brake assist” can increase stopping distance, heightening the risk of crashes or injuries.
Historically, GM introduced the eBoost system in 2019 and gradually rolled it out across its lineup, including the most popular EVs—Blazer EV, Equinox EV, Cadillac Lyriq, and Honda‑built Prologue and Acura ZDX. While the technology promises customizable brake feel, it also creates a single point of failure that regulators are now scrutinizing.
If the forthcoming analysis confirms a systemic defect, NHTSA could mandate a massive recall, impacting consumer confidence and GM’s financial outlook.
Why This Matters
BozokMedia analysis shows that a widespread brake‑by‑wire failure not only threatens driver safety but also challenges the industry’s shift toward fully electronic vehicle control systems, potentially slowing the EV adoption curve.
"The eBoost architecture, while innovative, introduces a single point of failure that regulators cannot ignore," says automotive safety analyst Dr. Maya Patel.
Frequently Asked Questions
Will all GM EVs be recalled? Not yet; a final decision will depend on the outcomes of NHTSA’s engineering analysis.
What is the main benefit of eBoost? It lets manufacturers fine‑tune brake feel for different driving modes, improving comfort and performance.
