2020 Buick Regal problems, complaints & recalls
Most-reported problem areas: Tires (1) · Electrical System:ignition:anti-Theft:immobilizer/Proximity:sensor (1)
🧭 Reliability snapshot
Compared against other Buick Regal model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (1)
Service Brakes, Hydraulic:power Assist:electric:control Module:software 2022-06-30 · campaign 22V465000 · 23,734 vehicles
Defect: General Motors, LLC (GM) is recalling certain 2018-2020 Buick Regal vehicles. In the event of a vacuum-power brake assist failure, a software error in the electronic brake control module (EBCM) may result in a loss of power brake assist. As such, these vehicles fail to conform to Federal Motor Vehicle Safety Standard No. 135, "Light vehicle brake systems."
Risk: A loss of power brake assist can extend the distance required to stop the vehicle, increasing the risk of a crash.
Fix: Dealers will update the EBCM software, free of charge. Interim owner notification letters advising owners of the safety risk were mailed on August 19, 2022. Owner notification letters were mailed September 16, 2022. Owners may contact Buick's customer service at 1-800-521-7300.
Service bulletins (586)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Unknown Or Other 2026-03-09 · PIP6104 · Service Bulletin/Repair Instructions
this preliminary information communicates the steps on how to save a gds2 session log and upload to a technical assistance case in cx connect.
Unknown Or Other 2026-03-09 · PIP4902V · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Showing the 6 most recent of 586 bulletins. Search all of them free at nhtsa.gov.
What owners report
2023-05-15 · Electrical System:ignition:anti-Theft:immobilizer/Proximity:sensor“proximity door unlock system rarely works goes in and out even with key fob in pocket and within proximity. i've reported the problem to buick/chevrolet many times, changed fob batteries and etc with no fix …”
2022-01-13 · Tires · 200 mi“the contact owns a 2020 buick regal gs equipped with continental procontact tx tires, tire size: 245/40/r19, dot number: 6y66wbr71819. the contact stated while driving approximately 70 mph, the tpms warning light indicated that the rear driver’s side tire air pressure was low. the tire lost air pressure and became flat. also, later the front passen…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.