There are 1 stored owner reports matching the brakes leading-label group for the 2010 BMW Z4 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)CAR IS A NEW (11 /21/09) BMW Z4 WITH LESS THAN 2,000 MILES. WHEN DRIVING IN SUBURBAN TRAFFIC AT APPROXIMATELY 45MPH, DRIVER SIGNALED FOR A RIGHT HAND TURN AT AN INTERSECTION WITHOUT A TRAFFIC LIGHT. WHEN BRAKES WERE APPLIED, THERE WAS VIRTUALLY NO STOPPING POWER. UNABLE TO SLOW FOR THE RIGHT TURN, DRIVER PROCEEDED TO THE NEXT TURN WHILE APPLYING ALL OF THE PHYSICAL PRESSURE SHE COULD MUSTER, WHICH FINALLY SLOWED THE CAR TOP THE POINT IT COULD BE TURNED AND STOPPED. IF THIS BRAKE FAILURE HAD OCCURRED WHEN THERE WAS STOPPED TRAFFIC, AN ACCIDENT WOULD HAVE CERTAINLY OCCURRED. THE PROBLEM WAS A CATASTROPHIC FAILURE OF THE POWER BRAKES HYDRAULIC BOOSTER. ADDITIONALLY, NO WARNING LIGHT EVER CAME ON BEFORE, DURING OR AFTER THE BRAKE FAILURE. THE BMW SERVICE DEPARTMENT SAID THAT THERE ARE WARNING LIGHTS FOR LOW FLUID AND LOW PADS, BUT NOT FOR BOOSTER FAILURE, WHICH IS UNBELIEVABLE. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.