1991 BMW 520 2.0L Petrol · J920 FCX

Structural integrity and the masking of corrosion are the primary mechanical concerns for this vehicle. While it passed its most recent test on 20 June 2025, the records reveal a chronic pattern of corrosion affecting the inner body sills, fuel pipes, and suspension components. Of particular concern is the repeated mention of excessive underseal applied to the subframe and steering component mountings, which has historically prevented a full inspection of the chassis. This, combined with a persistent oil leak noted across the last three years of testing, suggests a vehicle with ongoing degradation and remedial masking rather than comprehensive restoration. The recorded mileage of 159,806 miles is low for a thirty-five-year old vehicle, averaging roughly 4,566 miles per year. This usage profile indicates the car has likely spent extended periods stationary or has been used for infrequent, short-distance journeys. Mechanically, such a pattern often leads to the premature perishing of rubber components, as evidenced by the recent advisory for a cracking nearside front tyre, and can accelerate the corrosion of metal fuel and brake lines due to moisture retention. A physical inspection should prioritise the areas where underseal has been heavily applied to the subframe and steering mountings to ensure the underlying metal remains sound. During a test drive, listen for knocks or clunks when traversing uneven road surfaces, which would indicate further wear in the suspension arm ball joints or bushes, following the play recorded in previous years. Any vagueness in the steering or unusual vibration should be viewed as a potential symptom of the compromised mounting areas flagged in the latest MOT. The long-term presence of a central front oil leak necessitates a thorough check of the engine block and sump for active seepage. Given the history of corroded fuel pipes and pitted front brake discs, the integrity of the fuel system and the consistency of the braking performance are critical. Feel for any pedal judder or uneven deceleration during braking, which would confirm the continued deterioration of the discs. Finally, verify that the exhaust leak noted in 2023 has been fully rectified to ensure correct emissions and engine backpressure.