Three problems related to check engine light on have been reported for the 2005 Porsche Cayenne. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Porsche Cayenne based on all problems reported for the 2005 Cayenne.
I noticed a recall on your site for my VIN # but I have not been reached by Porsche to fix. I'm unsure if this has been the culprit of my check engine light and airbag light being illuminated on my dash.
I parked the car in the garage after running errands. When I returned to the garage the next morning there was a large puddle of fluid surrounding the car below. The check engine light stated that I needed to check coolant level. I immediately called the Porsche of plano and was told by the service writer that the coolant pipes are a commonly known, well documented point of failure. He suggested I run a search on google. I was shocked to see the number of complaints and just how many people have experienced the same issue. The problem is that Porsche used plastic materials in the design of the coolant pipes which are located at the top of the engine. The plastic becomes brittle over time due to the heat from the engine. When it becomes brittle enough it causes the engine to loose all fluid immediately. This has happened in cars while at highway speeds and others that are parked. Porsche does not supply the same parts to repair a failure. Porsche instead sells a kit made of aluminum piping that is designed not to withstand the heat of the engine the way it should have originally been manufactured. The cost for the kit and labor ranges between $2,000 - $3,000. The issue is now part of a class action lawsuit due to the number of owners who have had the same issue.
The contact owns a 2005 Porsche Cayenne. The contact stated that the engine light was illuminated then the vehicle started to lunge forward when the contact tried to accelerate, and it became difficult to shift gears. The vehicle was inspected by a dealer who advised him that there was a misfire on the engine and one of its components needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and they are currently waiting for a response. The failure mileage was approximately 47,000. Updated 05/04/11 updated 05/11/11.