NHTSA investigating Cadillac Lyriq after owners reported brake problems Drivers say they experienced a hard brake pedal and a brake failure message Cadillac over-the-air update will test the brake system at startup and warn of failure Many Cadillac Lyriq buyers had to put up with agonizing production delays that slowed the delivery of their electric SUVs, but now that production is in full swing, there’s literally no stopping the Lyriq.
For now, its solution is to roll out an over-air update that will cycle the brake booster during start-up when the vehicle is stationary to simulate an ABS event and test the safety of the brake system. If the spindle fractures during the test, a check light will appear on the dash along with a message instructing the driver to bring the car to a dealership for repair under warranty.