1997 Porsche 911 3.6L Petrol · P925 CJH

A defining characteristic of this 1997 Porsche 911's MOT history is a consistent, repeating pattern of rear axle brake and tyre advisories stretching back nearly a decade, alongside isolated lighting failures. The most recent test on 21 May 2025 resulted in a pass with no advisories recorded, following a same-day failure for a non-functioning offside rear stop lamp which was presumably rectified immediately to secure the pass. While the 2025 outcome is clean, the broader trend reveals that rear brake discs have appeared pitted or scored across four consecutive tests from 2017 to 2019, rear brake balance was flagged as fluctuating in three of those same tests, and nearside rear tyre edge wear has been noted on four separate occasions. An oil leak advisory also appeared in 2018, and a supplementary restraint system warning lamp issue was flagged in 2022. This is a record dominated by chronic rear axle wear patterns and recurring minor lighting defects rather than any single major structural failure. The recorded mileage of 44,648 miles across 29 years equates to roughly 1,540 miles per year, which is exceptionally low for any road vehicle and particularly atypical for a 911 of this vintage. Testing history shows significant gaps, with no recorded MOTs between August 2019 and March 2022, and again a long interval between 2022 and 2024, suggesting extended periods where the car was either off the road, used privately on roads exempt from testing, or stored. Mechanically, this usage profile carries specific implications for an air-cooled Porsche of this age: prolonged standing allows moisture to accumulate in the engine bay, promote corrosion on exposed suspension arms and brake components, harden rubber bushes, degrade fuel system seals, and encourage oil leaks from gaskets and seals. The recorded 44,000 miles should therefore be viewed as nominal rather than indicative of typical wear rates, and a low odometer reading on a 29-year-old flat-six should not be taken as evidence of minimal mechanical wear. For a prospective buyer, the test drive and physical inspection should be specifically targeted at the rear axle components that have repeatedly drawn advisories. Listen for any knocking or clonking from the rear suspension over uneven surfaces, which would suggest worn bushes, top mounts, or drop links given the car's age and low usage. On the road, pay close attention to brake pedal feel and pulling behaviour under firm application, as fluctuating rear brake efficiency was flagged three years running and rear disc pitting has been consistent since at least 2017. Inspect the rear discs directly for lipping, visible ridging, and surface corrosion, and check the rear calipers for binding or seized pistons, which can develop after long periods of inactivity. The tyres should be examined carefully for uneven inner-edge wear, matching the specific advisory pattern, which can point to alignment issues or worn rear suspension geometry. A thorough underbody and engine bay examination is strongly advised given the multi-year gaps in testing and the advisory for an oil leak recorded in 2018. With the engine warm, look for fresh oil seepage from the sump, rocker covers, and rear main seal area, all known leak points on these engines, and listen for any irregular idle, smoke from the exhaust, or unusual mechanical noises that might indicate dried seals or starved lubrication following long storage periods. Check that all exterior lighting, particularly the rear stop lamps and registration plate illumination, functions correctly without any cross-interference between circuits, as this exact fault caused the 2017 failure and the 2025 stop lamp failure. Finally, verify that the airbag warning lamp on the dashboard extinguishes promptly after ignition, addressing the 2022 advisory on the supplementary restraint system, as any persistent illumination would warrant professional diagnostic investigation before purchase.