2018 Buick Enclave Complaints

UNKNOWN OR OTHER — Filed 06/01/2026

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

SUSPENSION,FUEL/PROPULSION SYSTEM — Filed 06/01/2026

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)

ELECTRICAL SYSTEM,ENGINE AND ENGINE COOLING — Filed 05/26/2022

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.

POWER TRAIN — Filed 05/12/2026

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.

UNKNOWN OR OTHER — Filed 02/01/2026

Catalic converter weld broke both sides now

ENGINE — Filed 10/20/2025

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.

VISIBILITY/WIPER — Filed 09/19/2025

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

SEAT BELTS — Filed 12/16/2017

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)

POWER TRAIN — Filed 03/21/2026

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.

POWER TRAIN — Filed 11/21/2025

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.