2001 BMW M5 4.9L Petrol · M5 KNL

The vehicle’s roadworthiness record shows a mixed but ultimately concerning trend, with the most recent MOT test on 2026-03-23 passing without defects—though this follows a pattern of repeated failures and advisories over the past two years. The absence of defects in the latest test suggests a temporary correction of critical issues, but the history reveals persistent problems with brake pipes, suspension components, and corrosion that have not been fully resolved. The near-identical failures in 2025 (both March and April) for corroded brake lines, discoloured side repeaters, and worn suspension bushes indicate a lack of sustained mechanical attention. While the 2026 pass is encouraging, the recurrence of advisories on brake pipe corrosion and suspension wear implies underlying neglect that could resurface. Mileage data is insufficient to draw meaningful conclusions about usage patterns, as the recorded figures hover around 122,000 miles across multiple tests spanning nearly two years. There are no obvious gaps or alarming spikes, but the lack of pre-2024 data prevents any assessment of whether the vehicle has been driven at a reasonable rate for its age. Without earlier mileage markers, it is impossible to determine if the current state reflects normal wear or accelerated deterioration. A buyer should prioritise an immediate inspection of the brake system, particularly the corroded brake pipes (both front and rear) and the near-side rear suspension arm bush, which failed in 2025. The recurring advisories on brake pipe corrosion—compounded by grease contamination—suggest potential leaks or compromised hydraulic integrity, while the worn suspension bush raises concerns about alignment and handling stability. Structural corrosion should also be scrutinised, especially around the front sub-frame and near-side rear sill, as these areas were flagged in multiple tests. The supplementary restraint system fault from 2024 warrants verification, as airbag or seatbelt system failures are not always immediately obvious. Given the history, a thorough brake fluid flush, suspension component check, and corrosion assessment are essential before committing to purchase.