2005 Porsche Cayenne 4.5L Petrol · MX55 LLF

This 2005 Porsche Cayenne passed its most recent MOT in September 2025, but the test revealed significant corrosion and exhaust issues that demand careful attention. At 182,982 miles across 21 years—roughly 8,700 miles per year—the mileage is typical for its age, but the severity and pattern of defects suggest the vehicle has not been well protected from the elements or regular maintenance. The most serious findings cluster around corrosion and exhaust integrity. The fuel tank straps are corroded and loose on both sides, the sub-frame is heavily corroded, and all coil springs show corrosion. A corroded sub-frame is a structural concern that affects handling, safety, and repair costs. Corroded coil springs can fail without warning, especially under load. The exhaust has a minor leak now, but this is a step down from the major leaks recorded six months earlier in March 2025, when there were two large exhaust breaches and the Lambda reading was outside limits—suggesting previous overheating or seal failure in the exhaust system. The trend over the past two years shows instability rather than steady improvement or decline. The March 2025 failure included a significantly worn front brake disc in addition to the exhaust defects; by September the brake disc apparently passed re-inspection, but corrosion issues emerged as the dominant pattern. This shift suggests either that different inspectors focused on different problem areas or that corrosion damage has progressed while some wear items were addressed.