2003 BMW Z4 problems by component
414 owner complaints filed with NHTSA for the 2003 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 |
|---|---|---|---|
| Steering → | 342 | 83% | 42,800 mi |
| Air Bags → | 31 | 7% | 50,000 mi |
| Electrical System → | 13 | 3% | 67,625 mi |
| Engine and Engine Cooling → | 11 | 3% | — |
| Structure | 8 | 2% | — |
| Power Train | 7 | 2% | — |
| Vehicle Speed Control | 6 | 1% | — |
| Fuel System, Gasoline | 5 | 1% | — |
| Latches/locks/linkages | 4 | 1% | — |
| Seat Belts | 4 | 1% | — |
| Suspension | 4 | 1% | — |
| Equipment | 3 | 1% | — |
| Exterior Lighting | 2 | 0% | — |
| Tires | 2 | 0% | — |
| Visibility | 2 | 0% | — |
| Electronic Stability Control (esc) | 1 | 0% | — |
| Engine | 1 | 0% | — |
| Fuel/propulsion System | 1 | 0% | — |
| Service Brakes | 1 | 0% | — |
| Service Brakes, Hydraulic | 1 | 0% | — |
| Traction Control System | 1 | 0% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.