PCV system failed causing excess pressure to blow out the rear main seal and crankcase seal resulting in an oil leak. No lights and no codes were on the dashboard. The only symptom was a high pitched squealing sound during very cold weather. The problem has been reproduced by the dealer. The problem first appeared the first winter owning the vehicle.
Engine & cooling
2019 Buick Regal Engine problems
Owners have filed 3 complaints about the 2019 Buick Regal's engine & cooling with NHTSA - 15% of all its complaints, most recently on February 13, 2025. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
- Complaints
- 3
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Engine complaints
The contact owns a 2019 Buick Regal. The contact stated that when he attempted to start his vehicle there was no battery power, and no clicking sounds from the ignition. The contact stated that the instrument panel was blank. The contact stated that he had the vehicle jump started and the vehicle operated normally. The contact stated that the check engine warning light illuminated and then turned off after the vehicle was turned on. The contact also heard an abnormal whistling noise coming from the engine...
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compartment. The contact stated that the dead battery failure was an ongoing failure. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the battery and electrical system were working as designed. The vehicle had not been repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 6,000.
I have been going back and forth with gm customer service at 866-790-5600. I purchased the car 11/23/18 brand new with 12 miles on it. I had to take the car to get it serviced due to kept hearing something similar to the brakes keep scrubbing, in which I the dealership ordered the parts and gave me a loaner vehicle, 8/31/19 I complained when I went into the dealership to get my oil changed that the radio screen would just go black, and that the air conditioner system would be in off position and it would just keep...
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blowing on high. I was told to bring the car back in. Due to no techs available on saturday. Everything started working again. 1/6/2020 I took the car in bc ac started back doing the same thing running when off, sos was malfunctioning emergency calls all day and night every 5-10 mins head unit screen stays on service screen and couldnt be changed, the screens kept switching screens without being touched. Talked with service manager at dealership had to deactivate the onstar and take the car back when they received a loaner car. They cleaned button and said they ordered the part its on back order. 2/10/20 Im driving my vehicle and all of a sudden the car slows down and stops in the middle of the street in which the screen read reduced engine power. I was not far from dealership took it back yet again. I was given a loaner car the accelerator pedal position senors had to be replaced accelerator pedal with position senor assembly replacement engine controls and fuel. 2/14/20 Went and oil change completed that next day another issue on 2/17/20 the radio screen goes out and the ac/heat is on full blast and cant turn off. The same issues I was having 1/6/2020 have began yet again. I was contacted by gm and told they would order the part that was same part that was on back order. My car is still under warranty happening while I am driving. I have a lot of pics
Buick Regal engine complaints by year
Regal engine problems, every yearSource: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data