2011 Buick Regal engine problems

Related recalls

No recalls on file.

What owners say

1. Filed May 13, 2026TXElectrical SystemEngineTransmission & Drivetrain

   While driving on the highway at 60 mph, warning on dash came on saying “engine power reduced” and drop down speed to around 25 mph and I could not accelerate more than 25 mph on the highway which could have caused an accident because of the traffic flow behind me. I put a code scanner under the dash and it read code P2138, Throttle pedal position sensor switch.

   NHTSA complaint #11737701 · source
2. Filed Oct 8, 2025140,000 miCAEngine

   The contact owns a 2011 Buick Regal. The contact stated that while driving at 30 MPH, the vehicle stalled with the check engine warning light illuminated. The vehicle was able to be restarted. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 140,000.

   NHTSA complaint #11692104 · source
3. Filed Apr 16, 2024KSBody & StructureDriver Assistance & Safety TechEngine

   The cars mileage was altered due to car being wrecked prior and the other car that was used to replace wrecked parts was hidden and vin number was altered. Copart Inc and ICT Sharp Rides are party's involved, I bought car on 12/28/2023 mileage was listed as 132525

   NHTSA complaint #11583341 · source
4. Filed Oct 28, 2023MACrashTowedEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   Preparing to park into a parking space in an off street parking lot the vehicle forcefully and rapidly accelerated on its' own and crashed into a fence. I was not accelerating. I attempted to stop the car using the brakes but they did not engage quickly enough to stop the rapid, forceful, and without warning acceleration. Buick has been contacted about the defect. Buick ran extensive diagnostics on the car and denies there is a defect. Police came to the scene and advised…

   NHTSA complaint #11552417 · source
5. Filed Oct 28, 2023MAEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   When pulling into parking space the car rapidly accelerated on its' own and crashed into the car in the next parking space. I did not have my foot on the gas, the car was simply idling. The acceleration was so rapid that applying the brake was useless.

   NHTSA complaint #11552410 · source
6. Filed Oct 28, 2023MACrashEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   I was parking in marked space. I had turned into space, my foot was off the gas pedal. The car was 3/4 into the space when it malfunctioned and rapidly accelerated into a hardened snow bank. i instantly braked but there was not enough space to avoid collision.

   NHTSA complaint #11552406 · source
7. Filed Nov 30, 2021MOEngineLighting

   The contact owns a 2011 Buick Regal. The contact stated that while driving on several occasions the headlights became inoperable. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who informed the contact that the wiring in the bumper was hot at the base. The vehicle was taken to the local dealer where the engine was diagnosed. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was unknown.

   NHTSA complaint #11442162 · source
8. Filed Sep 7, 2021140,000 miMIElectrical SystemEngine

   The contact owns a 2011 Buick Regal. The contact stated while driving 30 MPH and accelerating to enter the highway, the vehicle stalled. The contact stated that the traction, stability, and engine power reduced warning lights were illuminated. The contact stated she was able to park on the side of the road for 30 minutes before continuing to drive to her destination. The contact took the vehicle to the local dealer however, the mechanic was unable to diagnose the cause of…

   NHTSA complaint #11431948 · source
9. Filed Jul 20, 2021IDFireElectrical SystemEngineFuel, Hybrid & EV Propulsion

   While the vehicle was driving, there was a loss of power, at that moment sparks was seen emanating from under the hood, then the vehicle completely stopped running. Once pulled over smoke was bellowing out from the hood and subsequently ignited into flames. Fire department was dispatched and fire was extinguished. The vehicle was towed away and is still at the tow yard. The tow operator, based on visual inspection stated the fire did start in the engine compartment and…

   NHTSA complaint #11425696 · source
10. Filed Jul 8, 2021VAEngine

    The engine shuts off when I slow down to make a left turn,this has happened twice. It does start again. I am afraid to drive it know.

    NHTSA complaint #11423963 · source
11. Filed Jun 24, 2021CAEngineOther / UnknownSteering

    The car doesn’t stay on park still will move forward or backwards The gear shift locks and does not move When I turn it makes a huge clack sound

    NHTSA complaint #11422078 · source
12. Filed May 7, 2021GAEngineFuel, Hybrid & EV Propulsion

    The oil consumption in the car is horrible, i have to atleat add oil in my car about 5 time in between oil changes, and my oil changes are done regularly, ive also have the issue of my oil and gas mixing, i did take it to the shop once and they fixed a recall that was involved with high pressure fuel pump, but im guessing they didnt fix the issue once that repair was done like they said it would.

    NHTSA complaint #11415583 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology