Porsche Cayenne owners have reported 1 problem related to gas recirculation valve (egr valve) (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Porsche Cayenne based on all problems reported for the Cayenne.
Porsche knowingly manufactured Cayenne model vehicles with plastic coolant tubes that degrade and fracture causing engine coolant to leak into the engine, potentially leading to significant engine damage. Porsche has known about this defect and failed to make consumers aware of the potential failure despite the risk to the owner’s safety and pocketbook.
See
all problems of the 2004 Porsche Cayenne
🔎.