Porsche S Diesel
The 4.2L V8 TDI is technically related to the CURA, in the revised calibration for the Cayenne facelift. Same strengths (enormous torque, low-rpm pull), same risks (timing chain, DPF, turbo wear). A niche product for the Cayenne buyer who wants V8 performance with diesel consumption.
V8 TDI facelift: Slightly better
Revised V8 diesel version — technically refined, slightly more power. The torque experience remains the same: 850 Nm, immediately available. A niche product for Cayenne buyers who want V8 performance combined with diesel efficiency.
Engine Weaknesses 7
V8 TDI Cayenne 92A: Timing chain sits at the rear of the engine, repair only possible with engine and gearbox removal. 3,000–6,000 EUR.
Symptoms: Chain rattle on cold start, camshaft position fault code
4.2L V8 TDI with twin turbos: bearing failure requires replacement of both turbos. Parts alone documented at 12,000 EUR.
Symptoms: CEL, power loss, whistling turbo noise
CUDC is the facelift update of the CUDB — shares all timing chain weaknesses. DPF regeneration cycles contaminate chain tensioner oil. Timing rails degrade at high-load speeds.
Symptoms: Knocking on cold start, code P0016, noise disappears after warm-up
V8 TDI injectors can fail and introduce metal shavings into the fuel system. Complete system flush then required. Costs up to 22,000 €.
Symptoms: Engine stalling, P0087, metallic clacking, tow-away required
Transfer case on all 92A models with multi-plate clutch wear. Porsche had an extended warranty. Outside warranty approximately 4,500–6,000 € replacement.
Symptoms: Vibration/judder on pull-off, AWD warning light, slip feeling at the rear when pulling away
Same DPF issue as CUDB. More frequent with short-trip use; long-distance driving keeps the filter clear.
Symptoms: DPF warning light, power reduction, increased consumption
Timing chain cover gaskets develop leaks at high mileage. Complex repair requiring engine and gearbox removal.
Symptoms: Oil leak at rear of engine, oil smell after switching off, oil spots
Vehicle Weaknesses 6
When turning to full lock, power steering assistance drops out briefly several times. Power steering pump overloaded or valve block faulty.
Level sensors and air suspension compressor fail through wear. Improved over the 955, but still a cost factor.
Blocked sunroof drains lead to water ingress. If the Bose sound system is fitted, the subwoofer in the boot can be damaged.
PDK gearbox and transfer case develop leaks. Oil loss at seals and shaft seals requires regular monitoring.
Rear doors develop rust at the door fold, often only 3-5 years after first registration. Porsche acknowledged the defects under warranty.
Climate control heats to maximum when A/C is switched off. Temperature sensor delivers invalid values. No fault codes stored.
Reports & Tests
254 owner complaints filed with NHTSA (2010–2017). Most reported: Powertrain (80), Engine (62), Other (53).