Question 1

What is the Plastic Coolant Pipe Failure (955 V8) issue on the Porsche Cayenne (955/957)?

Accepted Answer

The original plastic pipes under the intake manifold fail and leak coolant onto the starter motor. Symptoms include: Sudden coolant loss, Steam from the engine bay. Estimated repair cost: £1,200–£1,600.

Question 2

What is the Bore Scoring (4.5 V8) issue on the Porsche Cayenne (955/957)?

Accepted Answer

Catastrophic wear to the cylinder liners, most common on early 4.5L V8 engines. Symptoms include: Ticking noise, High oil consumption, Smoke from exhaust. Estimated repair cost: £6,000–£10,000+.

Question 3

What is the Driveshaft Carrier Bearing Failure issue on the Porsche Cayenne (955/957)?

Accepted Answer

The centre support bearing on the cardan shaft fails, causing a thumping noise under the centre console. A near-certain failure point on all 955/957 models. Symptoms include: Thumping under centre console, Vibration during acceleration, Clunking over speed bumps. Estimated repair cost: £300–£600.

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