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What 11 owners told NHTSA about the 2012 BMW 750i

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 (11)Crash / fire / injury (1)Engine (7)Transmission & drivetrain (3)Brakes (1)Electrical system (1)Seat belts (1)Wheels (1)

1 of 11 complaints match · Brakes · clear filters

Feb 7, 2017Electrical systemBrakesEngine

DEALER REPORTED THAT MOISTURE ENTERED A WATERPROOF ENCLOSURE THAT HOUSES THE BRAKE MODULATOR. WATER ENTERED THRU A DRAIN HOLE FROM THE COWL AND BYPASSED A PLATE MEANT TO KEEP WATER OUT. ONCE EFFECTED BY MOISTURE THE MODULATOR SHUT DOWN ALL FUNCTIONS OF THE CAR INCLUDING THE ENGINE WHILE MOVING. BMW BLAMED IT ON PARTIAL SUBMERSION OF THE MODULATOR BUT CAR WAS NEVER EFFECTED BY WATER/SUBMERSION AND THE DEALER AGREED THAT THEIR WAS NO EVIDENCE OF THAT AND COULD NOT FIND ANYTHING TO SUPPORT THAT CONDITION. UPON REPAIR DEALER WENT TO GREAT LENGTHS TO TRY AND SEAL COMPARTMENT AND INSTALL DIVERTER THAT WAS REPLACED IN THE REPAIR TO PREVENT REOCCURRENCE. THIS IS A VERY DANGEROUS CONDITION THAT APPEARS TO BE A MANUFACTURING DEFECT IN MANUFACTURE ON A VERY LIMITED NUMBER OF CARS MADE BY BMW FOR THIS SPECIFIC MODEL. OWNERS NEED TO KNOW THAT THE CONDITIONS EXPERIENCED HAVE A MUCH DIFFERENT EFFECT ON SAFETY DUE TO THE HYBRID DESIGN THAN A STANDARD NON HYBRID CAR.

NHTSA ODI 10950199

Working with the data? Download all 11 complaints as CSV · fetched from NHTSA July 26, 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 2012 BMW 750i verdict →