There are 14 owner-reported engine complaints for the 2021 Buick Encore GXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
My vehicle suddenly stalled and completely shut off while I was driving. No warning lamps, messages or other symptoms to alert me there was any engine issues. I was definitely put in danger as I was driving at rush hour in a 6 lane busy US 1 Federal Highway. The vehicle was stalled, without any power, in the middle lane with cars and trucks swerving around me at the last minute. I called 911 immediately and they dispatched cruisers to help push my vehicle across 4 lanes of traffic. This meant having to block 4 lanes of moving traffic. It was a long 10 minutes of waiting as angry drivers were leaning on their horns in frustration. AAA flatbed towed my vehicle to a near mechanic's shop, but it was after hours and had to be left there until morning. The mechanic inspected the problem and confirmed the issue was a fuel module and fuel pump failure. How does this happen without any alerts to the driver? How can you prepare a driver of such a serious engine failure putting that driver and other surrounding drivers at such a serious risk? This should be a safety recall and fixed by the dealer without charge to the driver. That is, if the driver is still alive.
The contact owns a 2021 Buick Encore GX. The contact stated while depressing the brake pedal to make a right turn, there was an abnormally loud popping and scrapping sound coming from underneath the vehicle. The contact pulled over to the side of the road. Upon exiting and inspecting the vehicle, the contact became aware that the exhaust manifold had detached from the vehicle. The vehicle was drivable and was currently parked at the residence. The vehicle was not diagnosed or repaired by a dealer or an independent mechanic. The manufacturer was not notified of the failure. The approximate failure mileage was 52,590.
Evap leak detection pump failed at 78,871 miles. 2022 models and beyond are covered for this defect.
Evap leak detection pump failed at 78,871 miles. 2022 models and beyond are covered for this defect.
Trying to understand why a recall was not done on an engine issue on this car and instead GMC chose to send out 2 letters in 2024 detailing the problem that "might" happen with the engine losing power while driving and for owners to "carry" the letters in the glove compartment of the vehicle so the dealership could be aware of the issue. You were told to not bring the car to be serviced unless the issue was obvious. Well it happened when I was out of state and had to immediately find a GMC dealership to fix the issue for which my car was in a dealership in [XXX] for approximately one month. If the proper recall would have been made I would NOT have driven the car out of state prior to getting it fixed. I had family members in the car with me at the time and to lose power on an interstate was very scary to say the least. I feel that GMC failed it's customers with this vehicle and I will never buy another GMC vehicle or for that another vehicle US made vehicle. The issue was fixed at GMC's expense but they are now failing to reimburse proper funds for the rental I had to use putting a burden on my finances...be that as it may I am totally disappointed with the Buick Encore GX 2021. You try to support the "american made label" and this is where it got me for trying to do the right thing...I feel no one is looking out for the consumers on this particular issue b/c I'm pretty sure I'm not the only one it has happened to...A RECALL SHOULD HAVE BEEN DONE ON THIS ISSUE..!! This is 2021 with fewer than 48,000 miles and up to date services by reputable GMC dealerships since I have had the car. The case # with GMC for this issue is XXXINFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Vehicle overheating randomly due to faulty Coolant Control Valve. Vehicle goes into reduced power mode and also instructs you to pull over and idle engine. Part is on National backorder for weeks. The issue could cause Vehicle to become inoperable and cause a crash.
The check engine light will come on with engine power reduced, code reads turbo under boost, The car will stay in limp mode and make it difficult to get out of traffic there is no warning before the car completely loses power and goes into limp mode!!
The contact owns 2021 Buick Encore GX. The contact stated while driving 70 MPH and accelerating, the check engine warning light illuminated. The vehicle was taken to an independent mechanic and was diagnosed with turbo charger failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 45,000.
Have had my car in the shop multiple time to be put on computer. It states under boost in the turbo. This car is barley 3 years old . And when the check engine light comes on the car goes into limp mode. This is just crazy . I've read more and more people complaining about this but buick doesn't want to do anything about it
The Turbo on vehicle has gone out once within a couple years of ownership and just recently went out again. I bought vehicle new and is a 2021 model. In researching this make and model it seems to be an ongoing issue with several owners experiencing this issue.
The contact owns a 2021 Buick Encore GX. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that occasionally the vehicle jerked with the check engine warning light illuminated. In addition, the contact stated that the speed odometer showed a different speed that the digital speed odometer reading. The vehicle was taken to the dealer where it was diagnosed with a failed turbo charger. The contact was informed that the turbo charger needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. Additionally, the contact stated that the vehicle had been taken to the dealer twice for the same failure. The contact stated that the vehicle was scheduled for diagnostic testing. The manufacturer was not made aware of the failure. The failure mileage was approximately 32,500.
I'm in need of a repair on my 2021 Buick Encore GX. It was seen at GM of Marion on July 30 for a warning light that came on as I was driving down the road after having an oil change. It stated my power was reduced. I took it in, and they told me they had just diagnosed this problem for another Encore owner, and it took two weeks to get the part in. It is now September 22, and I still do not have this fixed. It is a safety concern and I have been calling GM about it almost weekly, trying to get some help. How is it safe for my daughter & I to be driving down the road with only half power? I cannot pass anyone - the speed isn't there. I can't just pull out or even merge onto the interstate for fear of being ran over. And GM does not appear to care. I've been told by multiple dealerships that GM has them. They just will not freely send them out to dealerships to repair cars. I think if they have a car sitting on their lot that has the part, they should be allowed to use it to take care of the one that is already sold. I'm at 31,000 miles, and they told me it may not be covered if I am outside of my warranty when they decide to send the part. I need some help!
The contact owns a 2021 Buick Encore GX. The contact stated while driving approximately 60 MPH, the check engine warning light illuminated with the “Engine Power Reduced message displayed. The contact stated that the vehicle lost motive power and the vehicle failed to exceed 25 MPH with the accelerator pedal depressed. The contact stated that the loss of power had become a recurring failure and occurred at various speeds. The contact had taken the vehicle to a local dealer, who diagnosed that the intercooler on the turbo needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was returned to the dealer multiple times for the engine failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 43,000.
The contact owns a 2021 Buick Encore GX. The contact stated that while at a stop sign, the RPM was fluctuating from 0 to 3,000 RPM. The contact stated that the vehicle stalled with the check engine warning light illuminated. The vehicle was able to be restarted. The contact mentioned the failure recurred multiple times with the vehicle being unable to be restarted. The vehicle was taken to the dealer where it was diagnosed that the emergency jack needed to be repaired under recall. The vehicle was repaired however, the failure persisted. The vehicle was taken back to the dealer for a second time however, the failure was undetermined. After the third failure, the vehicle was diagnosed with an unknown software needing to be reprogrammed. The vehicle was diagnosed a fourth time and the contact was informed that the engine may not be receiving gasoline and needed to be repaired. The vehicle was repaired each time however, the failure continued. The manufacturer was notified of the failure. The approximate failure mileage was 9,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026