BMW Z4 owners have reported 66 electrical system related problems since 1996. Table 1 shows the 6 most common electrical system problems. The number one most common problem is related to the vehicle's electrical system (58 problems). The second most common problem is related to the vehicle's wiring (3 problems). For details of each of the problem category, use the links in the table.
| Problem Category | Number of Problems |
|---|---|
| Electrical System problems | |
| Wiring problems | |
| Battery Cable problems | |
| Underhood Wiring problems | |
| Power Door Locks Not Working problems | |
| Software problems |
Electrical power steering system failed, warning light came on. Vehicle suddenly became very difficult to impossible to steer. Failed to negotiate a turn and nearly hit a tree. I have an appointment set with an independent service dealer near me, but I’m afraid to drive it there, so I may Read details...
The insulated wiring inside the headlight housing has hardened and the insulation had cracked and fallen off. This allows the wires to short and causes unexpected failure of the headlights, parking lights, turn signals and other items inside the headlight housing. Read details...
Water gets into the battery compartment through the rubber grommet that carry's the main battery cable from the trunk to the front of the car. The battery compartment is a well that also houses the car stereo amplifier. Read details...
The wiring harness under the dash spontaneously ignited while I was driving. The fire was put out with a fire extinguisher, but re-ignited two more times. It didn't stop re-igniting until the battery wires were disconnected from the battery terminals. Police and the fire dept were called. Read details...
Passenger door lock will not unlock with the key fob or the interior switch. All other locks respond appropriately. The door will open manually with the interior handle. I replaced the lock actuator with no improvement. I am now trying to replace the electrical relay. The date below is approximate. Read details...