Three problems related to wiring have been reported for the 2004 Porsche Cayenne. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Porsche Cayenne based on all problems reported for the 2004 Cayenne.
The rear brake lights (left, right and high mounted) remain lit at all times, as does the rear right and left fog lights. Turning lights on or off has no effect. Depressing the brake pedal has no effect. This problem has occurred randomly and inconsistently and when the car has been unoccupied and unattended as well as while driving. While unattended, the lights coming on drains the battery and can strand the driver. If problem occurs and the battery is not drained, the driver may be wholly unaware of the problem and may drive with the brake and rear fog lights lit. This problem also creates a major safety hazard as the brake light remain on at all times. Following drivers have no way of knowing that the driver may be braking and could result in a serious and potentially fatal rear end collision. The driver of the Cayenne, is not aware of the problem. No warning lights are illuminated to make the driver aware. If problem is noticed, removing the fuses for the fog lights and the brake lights corrects the issue, but must be reinserted, allowing for the problem to reoccur. Vehicle build date was 12/03 and outside of the Porsche wiring harness recall, but this may be the result of a faulty wiring harness feeding the rear of the vehicle.
Breach of warranty claims, including but not limited to ignition failure, wiring harness problems, airbag illumination warnings, lock failure, window failure, all within the first 10 months. The vehicle does not go more than 2 or 3 months and 3,000 to 4,000 miles without having these problems come back despite numerous attempts to repair the car. Twice the car would not shut off and a third time the key became locked in the ignition and the ignition would not turn, start, etc. The locks also failed and could not put the car in gear to tow. Became stuck on the road. Manufacturer & dealer can't guarantee the reliability of vehicle but refuses to do anything but continue to temporarily repair car. The car has been in service over 30 days within 10 month period (and counting).
This vehicle is a Porsche Cayenne which is not on your list of vehicle make. This vehicle was delivered with defective brakes and wiring problems. Factory authorized dealer and service CO, thoroughbred motorcars, and distributor, Porsche cars of north America have failed to address or correct defects in vehicle that existed at the time of delivery of the vehicle. The rear hatch did not open fully upon release of the latch, brakes pulled to the right and would get worse when hot or wet, parking lights did not function properly, brakes grabbed with little pressure, warning on high beam, warning on dip beam, dip beams flickered then would shut off and the trailer lights did not function.