2009 BMW Z4 problems by component
22 owner complaints filed with NHTSA for the 2009 BMW Z4, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Wheels → | 11 | 50% | — |
| Engine | 4 | 18% | — |
| Electrical System | 2 | 9% | — |
| Seat Belts | 2 | 9% | — |
| Air Bags | 1 | 5% | — |
| Engine and Engine Cooling | 1 | 5% | — |
| Fuel/propulsion System | 1 | 5% | — |
| Power Train | 1 | 5% | — |
| Service Brakes | 1 | 5% | — |
| Steering | 1 | 5% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.