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What 36 owners told NHTSA about the 2011 Mini Cooper S Hardtop

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 (36)Crash / fire / injury (6)Electrical system (17)Engine (17)Airbags (3)Fuel system (3)Engine & cooling (2)Body & structure (1)Interior Lighting (1)Lights (1)Speed control (1)Transmission & drivetrain (1)

1 of 36 complaints match · Speed control · clear filters

Apr 11, 2012Fuel systemElectrical systemSpeed control

AS I WAS ACCELERATING WHILE MERGING ONTO A HIGHWAY, AT APPROXIMATELY 55-60 MPH, IT FELT AS IF THE CAR LOST ALL POWER FROM THE DRIVE TRAIN. THE POWER REENGAGED ABOUT A SECOND LATER, AND OVER THE NEXT 5-10 SECONDS THE CAR LOST POWER/REENGAGED TWO MORE TIMES. NO WARNING LIGHTS WERE TRIGGERED ON THE DASH. I'VE TAKEN THE CAR INTO DEALERSHIP AND REFERENCED SERVICE BULLETIN NUMBER SIM12-02-11/NHTSA ITEM NUMBER 10040855. DEALER REPORTS THAT BECAUSE IT CANNOT REPLICATE THE ISSUE AND THERE ARE NO REPORTED FAULT CODES, IT APPEARS THAT THERE IS NOTHING WRONG WITH MY CAR, THEREFORE IT CANNOT CONFIRM IF I'M ON MOST RECENT SOFTWARE OR PERFORM SOFTWARE UPDATE TO FIX ERROR REFERENCED IN THE SERVICE BULLETIN. *TR

NHTSA ODI 10454891

Working with the data? Download all 36 complaints as CSV · fetched from NHTSA July 27, 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 2011 Mini Cooper S Hardtop verdict →