There are 2 stored owner reports matching the electrical system leading-label group for the 2009 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)ENGINE UNEXPECTEDLY STALLED AND SHUTDOWN WHILE IN MOVEMENT WITH POTENTIAL TO CAUSE ACCIDENT. VEHICLE CANNOT BE TURNED ON UNTIL FULL STOP IS ACHIEVED AND TRANSMISSION PLACED IN "P." IDLE ENGINE RPM CONTINUES TO VARY DRASTICALLY UP AND DOWN WITH INDICATION A PROBLEM PERSISTS AND IS LIKELY POSE THE SAME SAFETY RISK. I BOUGHT VEHICLE USED ON 2012 AND HAD THE ISSUE SHORTLY AFTER PURCHASE TWICE AT HIGHWAY SPEEDS. DEALERSHIP TOOK MONTHS TO APPARENTLY RESOLVE. I AM BACK AT RISK.
TL* THE CONTACT OWNS A 2009 BMW Z4 CONVERTIBLE. THE CONTACT WAS DRIVING APPROXIMATELY 10-20 MPH WHEN THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO IMMEDIATELY RESTART THE VEHICLE WITHOUT HESITATION. THE VEHICLE WAS NOT REPAIRED. THE FAILURE WOULD OCCUR INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE COMPUTER WAS REPLACED. THE CONTACT STATED THAT THE VEHICLE WOULD NO LONGER OPERATE FOLLOWING REPAIRS. THE VEHICLE WAS LEFT WITH THE DEALER WHERE THE CONTACT WAS AWAITING FURTHER DIAGNOSIS. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 11,000 AND THE CURRENT MILEAGE WAS 11, 200.
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.