2001 BMW M5 4.9L Petrol · MA51 BYD

The vehicle's current roadworthiness is precarious, showing a recent decline in maintenance standards despite a long period of stability. While the most recent test on 22 July 2026 at 157,993 miles resulted in a pass, the vehicle failed earlier that same day due to a fault in the supplementary restraint system warning lamp and corrosion on the nearside rear lower suspension component mounting. This indicates that while the car is technically legal, an active airbag or SRS fault exists alongside emerging structural corrosion. The mileage history presents an unusual pattern. The vehicle averaged approximately 6,320 miles per year over its lifespan, which is typical for a performance car of this age. However, the data shows a significant discrepancy between the 2025 test at 177,975 miles and the 2026 test at 157,993 miles, suggesting either a clerical error in the records or a potential odometer rollback. Between 2016 and 2025, the mileage accumulation was inconsistent, with a notable period of heavy use followed by significant gaps in recorded testing. A prospective buyer must prioritize a physical inspection of the chassis and suspension mounting points. The 2026 advisory regarding corrosion on the nearside rear suspension mounting suggests the onset of structural degradation that could worsen. The 2016 records highlight a history of neglected consumables and mechanical issues, including pitted and delaminated rear brake discs, corroded fuel pipes, and a differential oil leak. These issues, combined with the recent SRS warning lamp failure, suggest that while the car has had long periods of clean MOTs, it is currently entering a phase of increased mechanical and structural vulnerability. Specific attention should be paid to the braking system and fuel delivery. The 2016 failure revealed binding brakes and excessive corrosion on brake pipes, which may indicate a tendency for the vehicle to sit for extended periods or for maintenance to be reactive rather than preventative. The buyer should also verify the integrity of the fuel system and check for any signs of the previously noted differential leak to ensure these historical faults have been professionally rectified rather than merely ignored.