2020 Buick Encore GX Engine Problems
- Complaints
- 14about this part
- Share
- 20%of 70 total for the year
- Median mileage
- 34miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the engine of the 2020 Buick Encore GX, 20% of the 70 complaints for this model year. Where a mileage was given, the median is 34 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was driving home approx 6:00 pm as I was starting on l75 my Buick 2020gx with less than 300 miles started to speed up to a very fast my brakes did not slow me down the car kept speeding up I was very scared when the car kept going faster now I am scared to drive it there was almost a crash trying to slow down”
NHTSA complaint #11389607, filed 2021-01, 14 miles“Started having trouble last week with the fuel gauge and a check engine light. Took the car in to have it serviced and they found that rodents had chewed through the harness located by the fuel. Cost $850 to repair which was not covered under warranty. Had the car back two days and went to use the car and it completely stopped functioning once we pulled out into traffic. We live on a highly tractor trailer traveled road and having the car just stop working could have ended in an accident if a car was coming from either direction. …”
NHTSA complaint #11403516, filed 2021-03, 38 miles“Car has less than 30 (thirty) miles on it; garaged since purchase bc of pandemic; started occasionally; battery dead when I tried to go out last week; charged battery; died again; charged again; check engine light alerted onstar, who sent email stating problems w/engine & transmission system, possible issues w/fuel management system, emissions control, misfire condition... Only 30 miles! New car! Just drove home from dealership and parked it. Tried chatting w/Buick customer experience, but they cut me off 3 times over 2 hours, so I gave up that exercise in futility. …”
NHTSA complaint #11415944, filed 2021-05, 30 miles“I was at a stop light and the light turned green, I preceded to press the accelerator, I was just starting to move forward and the, peddle seemed to take over with my assistance went all the way down and began speeding up. I tried breaking and the car just kept going and not wanting to slow down and kept gaining speed, I had to put car in neutral and turn engine off. …”
NHTSA complaint #11645021, filed 2025-02“I was driving on the interstate on June 7, 2023 heading to work doing the speed limit of 60 MPH and all of a sudden the check engine light came on and a message stated Engine Power Reduced and the engine literally dropped engine power immediately and thankfully there was nobody right behind me and I was able to get off the interstate to a safe place. I called the Buick GMC dealership where I purchased the vehicle and they said to bring it in. …”
NHTSA complaint #11528407, filed 2023-06Related service bulletins
- 11036592Sep 1, 2026Special Coverage. Certain 2020 model year Buick Encore GX vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger to fail. If this condition…
- 11024375Oct 20, 2025Special Coverage. Certain 2020 model year Buick Encore GX vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger to fail. If this condition…
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11023481May 9, 2025This service bulletin provides a procedure to fix an oil leak from a porous area at the cylinder head and how to fix it so that the engine does not have to be replaced.
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11017430Apr 2, 2025This service bulletin provides information on normal engine characteristics/noise produced by the LIH or LBP engine.
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11016942Mar 4, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
Engine: other model years
Other parts of the 2020 Buick Encore GX
21 complaintsOther or unknown
19 complaintsTransmission and drivetrain
18 complaintsElectrical system
16 complaintsVehicle speed control
6 complaintsFuel system
4 complaintsSteering
4 complaintsAir bags
3 complaintsEngine cooling
2 complaintsForward collision avoidance
2 complaintsBack-over prevention (rear camera)
1 complaintsExterior lighting
1 complaints
← All problems reported for the 2020 Buick Encore GX
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology