One problem related to wiring has been reported for the 2009 Porsche Cayenne. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Porsche Cayenne based on all problems reported for the 2009 Cayenne.
During normal commute to work driving, a message "check dim beam" appeared on the dashboard message board. Upon attempting to change a faulty dim beam headlamp bulb, I found headlamp harness wiring and all internal headlamp assembly wiring is cracked and crumbling and conductors are exposed and causing shorts and apparent lamp failure. Other headlamp lighting (side directional lamp) lighting flashed on and off when harness was touched, and other components of electrical system flashed and turned off and on by themselves, particularly the radio. When the suspect dim beam lamp was swapped with opposite (passenger side, the replacement lamp did not work but the suspect lamp from driver side worked on the passenger side leading me to believe the lamp assembly was suspect. Upon opening the access points on the drivers side assembly, the wiring was seen to be crumbling and unsafe. I am worried that a fire may start and have discontinued use of the vehicle at this time.
| Electrical System problems | |
| Wiring problems |