2009 Porsche Cayenne 3.0L Diesel · ML09 EXW

The 2009 Porsche Cayenne presents a mixed maintenance picture. The most recent test on 15 December 2025 at 83,258 miles passed, but the rear sub-frame was flagged as corroded, though not seriously weakened. This is a recurring theme. Looking back, the tester noted rear sub-frame corrosion in 2023 and 2022 under the same advisory wording. The problem has persisted for at least three years without being remedied, suggesting a pattern of monitoring rather than repairing. The November 2024 failure for a fractured offside front coil spring was promptly addressed, as the December 2024 retest at 79,766 miles passed without that fault. Brake hose corrosion at the ferrules has appeared in every single test since 2022, indicating a slow, ongoing deterioration that has not been resolved. The maintenance trend is stable in the sense that nothing has catastrophically worsened, but the persistent corrosion advisories point to a vehicle that has been kept running without thorough preventative work. The mileage accumulation tells an unusual story. Between 2022 and 2025, the car covered just 10,572 miles over three years, averaging roughly 3,500 miles annually. The jump from 79,766 miles in November 2024 to 83,258 miles by December 2025 is notable. That is 3,492 miles in thirteen months, which is consistent with the prior low-use pattern. However, the gap between the failed test on 28 November 2024 and the passed retest on 13 December 2024 is only eight days and three miles, which is entirely normal for a same-day or near-term retest. There are no suspicious mileage gaps or rapid accumulation anomalies in the record. A buyer inspecting this vehicle in person should focus on the rear sub-frame mounting points and surrounding structure. The repeated corrosion advisories across 2022, 2023, and 2025 suggest the corrosion has been present for years and may have progressed beyond what a static MOT inspection captures. Check for any signs of perforation or flaking metal, particularly around the offside rear mounting area flagged in 2024. The front coil spring that failed in November 2024 was replaced, but the nearside front spring should be examined for cracks or sag given the age and the fact that one has already fractured. The brake hoses at all four corners show persistent ferrule corrosion dating back to 2022. These hoses may look acceptable externally but could be internally degraded or close to failure. Inspect the rubber for swelling, cracking, or soft spots, and check whether the ferrules show active weeping or heavy surface rust. The minor oil leak noted in 2023 at 76,288 miles was not flagged in subsequent tests, which may mean it was repaired or simply fell below the threshold, but a visual check of the engine underside and transmission tunnel is still advisable.