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What 6 owners told NHTSA about the 2018 Mini Cooper S

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (6)Crash / fire / injury (3)Airbags (2)Electrical system (2)Body & structure (1)Brakes (1)Engine (1)

Newest first · 6 complaints

Jan 14, 2023Electrical system

UNKNOWN Driver side tail light socket. All lights stopped working. Took out the socket and the wiring harness connector burned up

NHTSA ODI 11501799

Dec 7, 2022Electrical system

Driving at low speed piercing loud noises came from speakers, buzzing and whining. Noise stayed on with ignition on or off and radio on or off. This occurred two more times on way home. Am waiting for dealer appointment. Have not driven vehicle since.

NHTSA ODI 11496400

Nov 14, 2021Engine

Took car into mini dealer for clunking noise problem. Dealer indicated motor mounts were cracked and needed to be replaced. Another customer at dealer was also having motor mounts replaced. His car was also 4 yrs old with 32K miles on it. Mount replacement was not covered under warranty as the car was 4 yrs and 3 months since warranty was activated and coverage ended at 4 yrs.

NHTSA ODI 11440369

Apr 9, 2019BrakesCrash

FEBRUARY 21, 2019 I WAS PULLING INTO A PARKING SPACE AND THE BRAKES TEMPORARILY FAILED. WHEN I PUMPED THEM A SECOND TIME THEY CAME TO A STOP, HOWEVER BY THEN THE CAR AND I HAD GONE OVER A HEDGE AND SIDE SWIPED A TREE. BMW NORTH AMERICA COULD NOT FIND ANY WARNING ON MARCH 11, 2019 WHEN THEY REVIEWED THE SYSTEMS, NO WARNINGS AT ALL, NO AIR BAGS DEPLOYED. I WAS TURNING IN TO A FAMILIAR PARKING LOT AT A SLOW SPEED.

NHTSA ODI 11195306

Nov 7, 2018AirbagsBody & structureCrash3 injuries

MY 2018 MINI COOPER COUNTRYMAN S WAS INVOLVED IN A FRONT END COLLISION WITH ANOTHER DRIVER WHO WAS TRAVELING AT APPROXIMATELY 50-60MPH. WE WERE TRAVELING APPROXIMATELY 13 MPH AT TIME OF IMPACT AND THE FRONT, KNEE OR SIDE AIR BAG(S) DID NOT DEPLOY. I HAVE A VIDEO OF THE ACCIDENT AS A DASH CAM WAS IN PLACE AT THE TIME OF THE ACCIDENT.

NHTSA ODI 11149854

Mar 9, 2018AirbagsCrash

I WAS AT A STOP BECAUSE TRAFFIC WAS BACKED UP IN TOWN NEAR THE HIGHWAY ENTRANCE AND A CAR REAR ENDED ME, PUSHING ME INTO THE CAR AHEAD. THE REAR CAR WAS MOVING AT AT LEAST 20 MPH. WITH A REAR END AND HEAD ON COLLISION AT THAT SPEED, MY AIRBAGS SHOULD HAVE DEPLOYED BUT DID NOT.

NHTSA ODI 11078335

Working with the data? Download all 6 complaints as CSV · fetched from NHTSA July 14, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Mini Cooper S verdict →