Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Buick Lacrosse owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2012 Buick Lacrosse. The contact stated that while driving at an undisclosed speed and making a turn, the vehicle shut off in the middle of the roadway and the vehicle failed to restart. A bystander advised the contact to press the alarm button twice to restart the vehicle. The contact followed the advice of the bystander, and the vehicle restarted. The vehicle was taken to Firestone, where an unknown diagnosis was made. The vehicle was towed to the dealer, where an unknown repair was performed; however, the failure reoccurred. The contact stated that the vehicle was towed to the dealer on several occasions. The dealer replaced the motor mounts, the engine oil, and other unknown parts; however, the failure persisted. The vehicle was taken back to the dealer; however, the vehicle was not repaired. The manufacturer was notified of the failure. …
The contact owns a 2012 Buick Lacrosse. The contact stated that while driving approximately 70 MPH, the vehicle stalled on several occasions. The stability trac and check engine warning lights were illuminated. The contact was able to restart the vehicle after several attempts. The vehicle was towed to the local dealer however, the mechanic was unable to duplicate the failure. The mechanic was unable to retrieve a fault code. The vehicle was taken to an independent mechanic who provided several unknown codes. The manufacturer was contacted but no further assistance was provided. The failure mileage was approximately 56,000. The contact has stated that due to the seriousness of the problems, that they no longer own the vehicle.
The contact owns a 2012 Buick LaCrosse. The contact stated while driving 70 MPH, the vehicle lost motive power and stalled. The contact was able to restart the vehicle after a while. The contact stated that the service stabili trac warning light was illuminated. The vehicle was towed to the dealer however, the mechanic was unable to duplicate the error code. The vehicle was not repaired. The contact stated that the error occurred several times. The manufacturer was informed of the failure. The failure mileage was 56,000.
The contact owns a 2012 Buick Lacrosse. The contact stated that while driving at an undisclosed speed, the oxygen sensor warning light was illuminated. The vehicle was taken to an independent mechanic and the mechanic reset the oxygen sensor warning light. However, after driving for 400 miles, the oxygen sensor warning light illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 40,000.
The contact owns a 2012 Buick LaCrosse. The contact stated while driving approximately 20 MPH, the vehicle stalled. The contact stated no warning light was illuminated. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the engine had seized and needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 170,000.
The contact owns a 2012 Buick LaCrosse. The contact stated that the check engine warning light was illuminated. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 44,000.
2012 Buick LaCrosse V6 (Fairfax Plant). The vehicle suffered a sudden, complete loss of engine power and forward propulsion while traveling at highway speed, cutting off mid-drive with no warning. This occurred alongside a persistent StabiliTrak malfunction; the dash showed repeated "Service StabiliTrak" warnings before the failure, then turned bright orange with multiple warning lights and a message instructing me to activate my turn signal and pull over before RPMs dropped to zero. Because power cut out instantly, my [redacted] son (passenger) and I were trapped in the center lane of a dense, multi-lane highway. I was forced to dodge high-speed traffic and coast the dead vehicle across multiple active lanes to reach the shoulder, creating an imminent collision risk to us and other drivers. …
All the specific details are unknown, but I had a mechanic work on my car and the problem that he had to fix. He stated that it should've been detected, but it was something wrong with my car, letting me know that I had the problem and also I have to keep replacing my camshaft timing Solenoid my car keeps giving me error codes P0011 and P0128
The charging system in my vehicle is no longer working. There's been a recall done for the charging system. It was fixed back in 2013 before long before I bought the vehicle. It's only been nine years since it's been fixed and now it's not working again. I'd like this matter to be looked into as I believe it's faulty at no fault of my own.
Car shut off while in stopping position. Happen 3 times before supposed problem was fixed and then two more time after oil change and transmission control module fixed. Dealership does not know what the issue. Thankful each time I was not driving on interstate.
Engine complaints in other Lacrosse years
Frequently asked questions
How common are engine problems on the 2012 Buick Lacrosse?
NHTSA has 51 complaints about the engine & cooling of the 2012 Buick Lacrosse, 25% of the model year's 206 complaints.
Is there a recall for 2012 Buick Lacrosse engine problems?
No. NHTSA lists no engine & cooling recall for the 2012 Buick Lacrosse, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2012 Buick Lacrosse engine problems start?
Half of the complaints with a recorded mileage happened before about 53,000 miles, and 25% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.