The US is investigating GM Cadillac Lyriq EVs for brake caliper defects

The US National Highway Traffic Safety Administration (NHTSA) announced Monday that its investigation unit has launched a preliminary assessment after receiving multiple reports of Cadillac Lyriq electric vehicles losing their brake assist functions.

The agency’s notice said field reports claim Lyriqs from the 2023 model year have had instances of a hard brake pedal, followed by a “Brake System Failure” message when starting or while driving.

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The agency said General Motors, which owns Cadillac, admitted that the electronic brake control module known as “eBoost” has an internal spindle that could break during an Anti-Lock Braking System (ABS) incident.

General Motors’ headquarters is located in Detroit’s Renaissance Center. (Paul Hennessy/SOPA Images/LightRocket via Getty Images / Getty Images)

ABS prevents the wheels from braking and skidding when in use, reducing the risk of an accident.

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Because of a broken spindle, vehicles may lose brake assist, experience speed restriction, and ABS will lose some functionality, GM said according to the NHTSA report.

GM did not immediately respond to FOX Business’ request for comment.

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GM has not issued a recall for the 3,322 affected vehicles, but has prepared an over-the-air update, which will alert drivers if the spindle breaks, NHTSA said.

Reuters contributed to this report.