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What 9 owners told NHTSA about the 2019 BMW X4

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 (9)Crash / fire / injury (1)Electrical system (3)Brakes (2)Driver assistance (1)Electronic Stability Control (esc) (1)Engine (1)Fuel system (1)Transmission & drivetrain (1)

1 of 9 complaints match · Driver assistance · clear filters

Apr 16, 2021BrakesDriver assistance

WHILE DRIVING, COLLISION DETECTION ACTIVATES FOR NO REASON. VERY RANDOM, SOMETIMES JUST WARNING LIGHTS AND SOUNDS, AND SOMETIMES SLAMMING ON BRAKES AT SPEED OVER 40 MPH. NO CARS COMING IN OTHER DIRECTION OR ANY OBSTACLES WHATSOEVER. WEATHER CLEAR. I ALMOST GOT REAR-ENDED ONCE. DID NOT ACTIVATE WHEN FOX RAN IN FRONT OF CAR. I CAN GO WEEKS WITHOUT THIS HAPPENING AND THEN IT COMES OUT OF THE BLUE. IT'S IN THE SHOP FOR THE THIRD TIME FOR THIS COMPLAINT AND SERVICE SAYS THEY HAVE NO "ERROR CODES" AND CAN'T RECREATE THE PROBLEM. BMWUSA TOLD SERVICE TO TRY TO RECREATE THE PROBLEM BY DRIVING IT OVERNIGHT. THERE'S A 50/50 CHANCE IT WILL HAPPEN WHEN THEY DRIVE IT, AND THERE STILL WON'T BE ERROR CODES! BMW WON'T AUTHORIZE ANY REPAIR UNTIL THEY GO THROUGH THESE STEPS. THIS HAS BEEN ON AND OFF FOR AT LEAST 6 MONTHS. DATE BELOW WAS MOST RECENT OCCURRENCE. OBVIOUSLY, OBTAINING ANY DOCUMENTATION OF PROOF IS IMPOSSIBLE UNLESS I HAVE A CAMERA CREW ON ME ALL THE TIME. IT'S TERRIFYING AND DANGEROUS!

NHTSA ODI 11408402

Working with the data? Download all 9 complaints as CSV · fetched from NHTSA July 12, 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 2019 BMW X4 verdict →