2018 Buick Enclave

65 complaints on file, page 1 of 4.

1. Filed Sep 25, 2026Failure Sep 24, 2026Mobile, ALElectrical system, Automatic emergency braking, Vehicle speed control

   The vehicle is experiencing an intermittent but severe safety defect involving the StabiliTrak and Electronic Parking Brake (EPB) systems. While driving at operational speeds, the "Service StabiliTrak" warning light illuminates, immediately followed by the uncommanded, autonomous engagement of the electronic parking brake. When the defect occurs, the vehicle forcibly brakes itself and suffers a complete loss of throttle response, preventing acceleration. This creates a severe, immediate crash hazard, as the vehicle decelerates abruptly without warning to surrounding traffic, leaving the driver unable to accelerate out of harm's way.The vehicle was brought to an authorized General Motors dealership multiple times during the active warranty period for recurring StabiliTrak system warnings. The manufacturer failed to permanently diagnose and resolve the root cause of the Electronic Brake Control Module (EBCM) failure. The vehicle remains highly dangerous to operate due to unpredictable, uncommanded braking.

   NHTSA complaint 11766879
2. Filed Jun 17, 2026Failure Jun 1, 2026Aiken, SCUnknown or other

   2018 Enclave w/106k on the odometer and the catalytic convertor cracked. $2200 repair.

   NHTSA complaint 11744702
3. Filed Jun 8, 2026Failure Jun 1, 2026Merriville, INFuel/propulsion system, Suspension

   I am submitting this letter to formally report two ongoing issues with my 2018 Buick Enclave. First, I have experienced persistent problems with the emissions purge valve. My vehicle has repeatedly triggered diagnostic trouble code P0496, indicating a malfunction in the purge valve system. I am aware that this issue has been the subject of recall campaigns for other Buick Enclave models; however, my vehicle has not been included in any such recall, despite exhibiting the same symptoms. This malfunction has resulted in persistent check engine warnings and noticeable performance concerns, raising questions about emissions compliance and the overall reliability of my vehicle. Given that other vehicles of the same make and model year have been recalled for the same issue, I respectfully request that my vehicle be reviewed for inclusion in the recall. Second, I am formally reporting a malfunction involving the stabilizers. Recently, I have noticed unusual noises and instability when driving, particularly when turning or traveling over uneven surfaces, which indicates a potential stabilizer malfunction. These issues have persisted despite regular maintenance and inspections, affecting the handling and safety of the vehicle. I believe this may represent a manufacturing or design defect that could pose a risk to other owners of the same make and model. I respectfully request that the National Highway Traffic Safety Administration investigate this matter further. I kindly ask the National Highway Traffic Safety Administration to consider expanding the existing recall to encompass additional vehicles affected by this defect. Please advise if you require further information or documentation regarding my case. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint 11742783
4. Filed May 26, 2026Failure May 26, 202272,000 milesKnoxville, TNAlternator/generator/regulator, Engine control module (ecu/ecm)

   The contact owns a 2018 Buick Enclave. The contact stated that while driving at various speeds, the vehicle shut off and failed to restart. The vehicle was towed to the dealer, where the alternator was replaced 4 times before the dealer diagnosed that the failure was due to oil leaking onto the alternator and the battery. The contact stated that the alternator had been replaced 6 times in total. Additionally, the contact stated while pulling out of the parking lot and onto the road, the vehicle shut off. The messages "Electronic Control Module Failure", "Battery Saver Active", "Battery Charging System" and "Steering Assist Is Reduced- Drive with Care" were displayed. The vehicle failed to restart and was towed to the dealer, where it was diagnosed with the Electronic Control Module (ECM) and alternator failures. The vehicle was being repaired. The manufacturer was notified of the failure. The failure mileage was approximately 72,000.

   NHTSA complaint 11740184
5. Filed May 12, 2026Failure May 12, 2026Golden, COPower train

   After two transmission flushes and being told by a Buick dealership's service technicians that nothing is wrong with the vechile's transmission, it has now failed completely at ~90k miles.

   NHTSA complaint 11737422
6. Filed May 11, 2026Failure Feb 1, 2026Monticello, INUnknown or other

   Catalic converter weld broke both sides now

   NHTSA complaint 11737064
7. Filed May 5, 2026Failure Oct 20, 2025New Johnsonville, TNEngine

   Exhaust leak from broken front exhaust pipe. This has been a known defect in this make/model however the year of my vehicle was not included in the extended repair window and should have been. The exhaust leak was identified by the dealership when the vehicle was taken in for other maintenance. I had to pay for the repair myself and would like to be reimbursed due to this being a manufacturer known defect with the exhaust pipe. The exhaust leak caused unusual noises, a loud roaring, and reduced gas mileage. This was also a danger for carbon monoxide exposure.

   NHTSA complaint 11735792
8. Filed Apr 28, 2026Failure Sep 19, 2025Hilton Head Island, SCVisibility/wiper

   The air conditioning system failure prevents proper windshield defogging, significantly reducing visibility in humid or rainy conditions. Additionally, cabin temperatures become excessively high, causing driver fatigue and impaired concentration. This creates an unsafe driving condition and increases the risk of a crash

   NHTSA complaint 11734443
9. Filed Apr 4, 2026Failure Dec 16, 2017Laurinburg, NCSeat beltsCrash

   In December 2017 we were involved in a rear end collision so violent the spare tire was knocked out from under the vehicle. Our vehicle, 2014 Buick Enclave VIN [XXX] was struck in the rear. The lap belt held us secure, but the shoulder belt allowed us to be tossed forward. My head hit the left windshield/top post leaving me looking like a racoon the next day. General Motors representatives, [XXX] CEO at the time ,stated the seat belts functioned properly. I injured my left wrist as a result of being thrown forward and have pain in it ever since then. We now drive a 2018 Buick Enclave VIN [XXX] that we purchased as a result of the December 2017 accident. We have noticed the same problem with the shoulder belts not working in sync with the lap belt, especially during a panic braking. Could this be product failure or just coincidence? I BELEIVE THIS WARRANTS EVALUATION! Thank you. My email address is [XXX] , mailing address is [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint 11729195
10. Filed Mar 23, 2026Failure Mar 21, 2026110,000 milesRocky Top, TNPower train

    The contact owns a 2018 Buick Enclave. The contact stated that while at a stop light, the accelerator pedal was depressed; however, the vehicle failed to respond as intended, with a grinding sound coming from the transmission. A bystander pushed the vehicle to the side road, and the vehicle was later towed to the residence. The contact’s husband inspected the vehicle and determined that it had experienced transmission failure. No further information was available. The vehicle was not yet repaired. The manufacturer and local dealer were not contacted. The failure mileage was 110,000.

    NHTSA complaint 11726444
11. Filed Dec 23, 2025Failure Nov 21, 202571,000 milesHoldenville, OKPower train

    The contact owns a 2018 Buick Enclave. The contact stated while stopped at a gas station; after refueling the vehicle, the vehicle was restarted but was unable to shift to drive(D). The contact attempted to shift to reverse(R) and the shift lever failed to respond. The contact stated an unknown warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 71,000.

    NHTSA complaint 11706736
12. Filed Dec 21, 2025Failure Dec 1, 2025San Diego, CAAir bags, Electrical system, Exterior lighting

    My vehicle has begun all us sudden flickering headlights from low beams to high beam when driving and also it ay the airbag safety light turn on with the locks also doing a closing and opening while driving.

    NHTSA complaint 11706354
13. Filed Dec 11, 2025Failure Jan 6, 2025Sunrise, FLExterior lighting

    The headlights continously and irregularly flicker between high and low beam while driving at night. I have no control over it and cannot turn off the high beams when they activate. This is highly annoying to drivers ahead me, as they believe I am trying to get their attention (or be obnoxious). In these times and the legalization of open carry weapons in the state of Florida, this can be highly dangerous if the wrong person is aggravated by unintentional signaling. I have already had issues on the road with drivers not happy with the high beam flicking on and off at them while driving on the road. They have become very aggressive, following, slowing down, honking at me because they think I am being impatient or trying to tell them someting is wrong. I spent $2000 in January 2025 trying to get this fixed and it has started (December 2025) happening again.

    NHTSA complaint 11704524
14. Filed Nov 19, 2025Failure Oct 15, 2025100,000 milesMonticello, INEngine and engine cooling

    The contact owns a 2018 Buick Enclave. The contact stated that after picking up the vehicle from the dealer for a different failure, the exhaust pipe made an abnormally loud sound while driving. The check engine and other unknown warning lights were illuminated. The vehicle was taken back to the dealer, who determined that the catalytic converter had failed and informed the contact that the catalytic converter and the front exhaust pipe needed to be replaced. The vehicle was not repaired. The contact related the failure to Special Coverage Adjustment: N212356540 (Front Exhaust Pipe); however, the VIN was not covered. The manufacturer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 100,000.

    NHTSA complaint 11700353
15. Filed Oct 24, 2025Failure Oct 20, 2025Marysville, MIService brakes

    Several times I have been stopped at a red light, and my parking break will come on without me engaging it. I was almost hit by other vehicles the last time my vehicle did this. People were blasting their horns and speeding around me because I was unable to move my vehicle. Because I had not manually engaged my parking break, my vehicle would not allow me to disengage the parking break until after it finally read that I engaged it. It took me 10 minutes of having to turn my car off and back on and trying to engage the parking break manually before the vehicle finally noticed it was engaged and would allow me to disengage my vehicle so that I could move it out of the way. This has now happened 3 separate times in the last month. It is an extremely dangerous situation and is making me become nervous to drive my own vehicle.

    NHTSA complaint 11695400
16. Filed Sep 15, 2025Failure Sep 4, 202483,000 milesYoungstown, OHAir bagsCrash1 injured

    The contact owns a 2018 Buick Enclave. The contact stated that while making a left turn, another vehicle jumped onto a curb and struck the rear end and rear tire of the vehicle. The front driver side, passenger side, and curtain air bags deployed. The contact was concerned about whether the air bags should have deployed for the type of impact experienced. No warning light illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. A police report was filed. The contact sought medical attention for bloody stool, lower back pain, and neck pain. The manufacturer was not made aware of the failure. The failure mileage was approximately 83,000.

    NHTSA complaint 11687252
17. Filed Aug 25, 2025Failure Aug 6, 2025Ashford, WAEngine, Steering

    Wednesday August 6th 2025, I was coming home from work, the low engine compression and engine light came on the car was shaking and I lost power on a busy road, I had to pull it off the road quickly before I lost all power. I stayed there for a few minutes, then turned the car back on to retreat to a safer spot, I then waited for my husband to bail me out, we checked the oil on the dipstick, there was minimal oil on it. We added 1 quart of oil, then the lights went off, all seemed fine. August 23rd 2025, I was driving my car and the same thing happened car lit up with low engine compression and engine light came on car was shaking, I shit the car off. we added 1quart of oil. But the engine light stayed on after about 30 min. I shut the car off. The engine light went off after I shut the car off.

    NHTSA complaint 11682988
18. Filed Aug 25, 2025Failure Aug 15, 2025Easton, PAElectrical system, Engine, Vehicle speed control

    I am a [XXX] and owner of a 2018 Buick Enclave that suffered a catastrophic transmission failure which nearly killed me and my child. On Friday, [XXX], while driving westbound on [XXX] from Edison, NJ to my home in Easton, PA, my vehicle suddenly and without warning came to a complete halt in the fast lane. A driver tailgating me swerved at the last second to avoid impact. Moments later, when I tried to move again, the car lost all power and drifted helplessly across two lanes of speeding traffic, directly into the path of two tractor-trailers barreling down at highway speeds. This was the hottest day of the summer, and I was left in terror, fully aware that one wrong move would have ended our lives instantly. The fact that my child could have lost their only parent because of a mechanical defect is beyond unacceptable. The stress, fear, and trauma of this incident cannot be overstated—it was a near-fatal event that never should have happened. My mechanic has since confirmed the transmission is destroyed, with black metal fragments throughout—clear evidence of internal failure. Only two months earlier, in June 2024, the car passed inspection with no codes or signs of a problem. This was not wear and tear; it was a hidden, catastrophic defect. In December 2024, GM recalled more than 461,000 vehicles, including certain 2018 Enclave models, for transmission defects leading to rollaway and internal failure. Source: The Lemon Firm, 12/18/24 [XXX] ). My case mirrors the defect exactly, yet I never received recall notice. I demand GM confirm my VIN’s inclusion and cover the full cost of repair or replacement. I barely escaped a fatal crash. GM must act immediately before lives are lost. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11682848
19. Filed May 23, 2025Failure May 16, 2025Maysville, KYPower train

    The torque converter is failing it seems this is far too common and dangerous with all Buick enclaves for this year. The vehicle shakes when applying the gas not having the power it needs to keep a steady speed without shaking. A mechanic stated the torque converter is bad known as the “GM shutter”

    NHTSA complaint 11662883
20. Filed May 19, 2025Failure May 15, 2025Mount Pleasant, WIFuel/propulsion system

    Check engine light was on due to the EVAP Purge Solenoid not sealing properly and causing a leak. Scan testing performed of the engine control module and diagnosed/cleared DTC P0496-00. Vehicle was brought to a dealership for repair.

    NHTSA complaint 11661835