2009 Bmw Z4: Reliability Data
When Do Complaints Happen?
Distribution of NHTSA complaints by vehicle mileage at time of report.
What Fails?
Most reported component issues from NHTSA complaints.
Severity Assessment
Sample Complaint Reports
"MY 2009 BMW Z4 WAS PARKED IN MY DRIVEWAY AT ABOUT A 65 ANGLE TO THE REAR OF MY TOYOTA PICKUP TRUCK. I GOT INTO THE BMW INTENDING MOVE IT INTO THE GARAGE. THE CAR HAS A STANDARD TRANSMISSION AND WAS IN FIRST GEAR WITH THE PARKING BRAKE ON. I DEPRESSED THE CLUTCH PEDAL AND STARTED THE ENGINE. AN I..."
"I AM LEASING A 2009 Z4 BMW, THE ENGINE CAR STALL WHILE DRIVING THIS HAPPENED TWICE IN A PERIOD OF 2 WEEKS, I ALMOST HAVE A CAR CRASH BEHIND IN BOTH OPPORTUNITIES, THANKS THAT THE TRAFFIC WAS VERY SLOW, THE SECOND TIME I HAVE TO GO OUT THE ROAD. I BROUGHT THE CAR THE FOR SERVICE, THEY WERE ABLE TO RE..."
"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 ..."
Source: NHTSA ODI Complaints Database. Names and identifying details omitted.
When Were Complaints Filed?
Number of complaints by the year the issue occurred.
When Does Each Component Fail?
Median mileage at complaint for top components.
Where Are Complaints Coming From?
Top states by complaint count.
Bmw Z4 — Other Years
See how this model compares across different model years.
Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.
Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.
Data through: 2026-03-28
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