BMW Z4 owners have reported 68 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 (60 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 | |
| Software problems | |
| Underhood Wiring problems | |
| Power Door Locks Not Working problems |
Engine starter safety recall came out in September 2025, with no remedy or parts existing for fixing it. 5 months later, and no timeframe is provided for a remedy. This is a major fire risk given the amount of rain now that could corrode the starter and lead to a fire. 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 battery on the vehicle was dead and replaced. After the battery was replaced, the vehicle is in "transportation mode". Under this mode, the ac, fan and rear defroster do not work. The vehicle need to be returned to the dealer to reinitialize the software to remove the transportation 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...