Credov's researched list of the 2 faults the Porsche Cayenne S (955) is known for (2003–2007), 2 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
What to look for: With a torch, look down the back of the engine and at the bellhousing for pink or green coolant crust.
Why it matters: This failure can dump all the engine's coolant with little warning and, if driving continues, overheat and warp the engine; the proper fix needs the intake manifold off and is a big labour job. Confirming the aluminium pipe upgrade has been done removes the risk entirely.
What to look for: Listen at cold start and idle for a light tapping or knock from one bank that fades as it warms.
Why it matters: Once bore scoring starts it can progress to engine failure within a short distance, and a replacement or rebuilt engine usually costs more than the car itself is worth. A specialist borescope inspection before buying is the only sure way to know, but the cold-start tapping test can flag it on the spot.
Got a question about a Porsche Cayenne S (955)? Ask Credov: a noise, a warning light, a part or how to fix it.
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.