1994 BMW 520 2.0L Petrol · L246 AVL

Significant structural corrosion and recent emissions failures represent the primary mechanical risks for this vehicle, following a failed test on 25 November 2025 regarding exhaust lambda readings. While the car achieved a pass on 29 November 2025, the preceding months show a concerning progression of defects. Specifically, the August 2025 failure highlighted major structural issues, including excessive corrosion to both nearside and offside rear subframe mountings and reduced strength in the nearside front seat belt anchorage area. This follows a history of advisory notices for corrosion in the integral body structure and subframe pins dating back to 2022 and 2023, indicating a long-term pattern of deteriorating structural integrity in the chassis and floorpan. The recorded mileage of 113,355 miles over approximately 32 years indicates a low annual usage rate of roughly 3,542 miles. While this low accumulation suggests less wear on high-frequency drivetrain components compared to higher-mileage examples, it often correlates with the type of environmental degradation seen in the MOT history. The recurring advisories for corrosion on fuel pipes, brake pipes, and integral body structures are consistent with a vehicle that may spend significant periods stationary or in environments where moisture can settle in chassis cavities, accelerating oxidation in the subframe and sill areas. Prospective buyers should pay close attention to the chassis and suspension during a physical inspection and test drive. Given the major failures regarding subframe mounting corrosion and previous advisories for worn subframe pins and bushes, it is essential to check for any movement or knocking sounds from the rear of the vehicle when traversing uneven surfaces or bumps. The history of nearside front suspension arm ball joint play also warrants a check for any wandering or pulling sensations through the steering wheel. Furthermore, the recent failures related to exhaust lambda readings suggest that while the emissions passed in late 2025, the engine's ability to maintain correct air-fuel ratios should be monitored for any changes in idle stability or hesitation under acceleration. Attention must also be directed toward the underside of the vehicle regarding fluid integrity and braking safety. The 2023 advisory for an engine oil leak should be investigated to see if the volume has increased, which may manifest as oil misting on the lower engine block or a noticeable scent of oil during operation. Additionally, because the records show a history of corroded rear brake and fuel pipes, a thorough visual inspection of these lines is necessary to ensure they have been adequately addressed and are not showing signs of further degradation or weeping. Any evidence of fluid weeping near the rear subframe or brake lines should be treated as a high priority.