2024 Cadillac Lyriq Reliability Report

Automatic emergency braking slams on with nothing ahead, at speeds from a crawl up to 65 to 70 mph. Following drivers then have to swerve to avoid a rear-end crash. Rain triggers false braking in reverse that can take several tries to clear. Adaptive cruise control sometimes fails to slow for stopped traffic, or speeds up toward a car that has just stopped. Driver-assist screens can go black and switch the systems off. Dealers often cannot reproduce the fault, and owners say it continues after dealer visits and over-the-air updates. One report puts onset at 3,400 miles.

Rear automatic braking slams on again and again while backing up in the rain, with nothing behind the car. Some owners can barely back out of a driveway or parking space. Sloped driveways set it off too, and switching the feature off does not always help. Some reports describe the same hard, false braking at highway speeds, with one injury. Less often, the system fails to brake at all. One crash report, filed under a 2023 model, involved reversing into a guardrail at 8,600 miles with no warning. Dealers typically cannot find a cause.

This category mixes unrelated reports. The most serious is a car two days old that lost power, smoked, and caught fire after a drivetrain warning. In a crash report, the car surged forward in a garage while in one-pedal mode. Another car was found dead at about 385 miles with a flat 12-volt battery and drive unit warnings, and the dealer could not diagnose it. Other reports cover one-pedal driving turning itself off, built-in GPS freezing after a February 2026 update, water leaking past the windshield, a sunroof cracking with no impact, and no printed owner's manual.

The car loses drive power while moving, and regenerative braking stops with it. Drivers coast to the shoulder, and a restart usually brings everything back. One-pedal driving can shut off at a stop and let the car lurch forward. High-voltage battery fault codes flagged "Service Right Away" leave at least one car sitting at a dealer with no repair plan. One crash report describes hard braking with no cause, followed by the car shifting into reverse on its own and backing into another vehicle.

The car surges forward while being parked at walking speed. In one case it hit a parked car, a tree, and a building, and the driver was injured. Two of the three reports involve crashes. One owner reports automatic emergency braking failing to stop for a stationary object at under 25 mph, even after the brake control module received a software update. Another describes one-pedal driving switching off at speed with a slight surge, alongside a side detection warning.

Both a parking-lot surge and a full software failure at speed appear here. In the crash report, the car accelerated at about 1 mph while turning into a space, then hit a parked car and a wall with no warning lights. In another case at 65 mph, steering assist, AWD, headlamps, and brake assist all dropped out together. Steering became hard to control and braking was unavailable, and a reboot did not clear the errors. A third owner reports a steering wheel that sometimes wobbles and fails to turn the wheels.

The front doors bounce back hard when opened and can swing shut on the legs of drivers, passengers, and children. Blocking the door with a hand is the only way to avoid it. The second report is really an electronics complaint filed here: the instrument panel blanked for a few seconds, the brakes applied hard in a driveway, the seat shook as collision alerts fired, and water got into the cabin. All of it started at about 99 miles, and the dealer did not diagnose it.