Two problems related to water pump 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.
Driving vehicle, heard noise and engine lights on. Stop check engine, belts off. Tow to service facility. Water pump pulley was found to split, made of fiber. Replaced pulley and multi rib belt.
Driving on interstate highway, check engine and add coolant lights on. Stopped added coolant, drove home parked in driveway. Out to use Cayenne again, noticed coolant on driveway, started engine coolant leak allover drive. Called Porsche dealer, not covered under warrenty, also 2 week backlog in getting repair, call independent service and had tow to independent garage. Replace all coolant pipes and water pump. After repair "internal engine noise". Ok to drive.