2017 BMW 420 2.0L Diesel · MJ67 KLL

The most recent MOT test on 2026-07-10 resulted in a passing grade, though it highlighted several persistent advisories that suggest ongoing wear and potential long-term risks. While the vehicle did not fail this test, the recurring minor fault with the near-side rear inner position lamp indicates a persistent electrical issue that should be addressed promptly to avoid further complications. The advisories on front and rear tyres nearing the legal limit—particularly the edge wear—demonstrate significant tread degradation, which is a direct consequence of high mileage and aggressive driving conditions. The failure in June 2026, where both rear shock absorbers were found to have serious fluid leaks, underscores a critical mechanical failure that could compromise ride control and handling stability if left unresolved. These recurring issues, combined with the high annual mileage, suggest a maintenance trend that has not been fully mitigated, with the vehicle’s suspension and tyres bearing the brunt of wear. The vehicle’s recorded mileage of 124,756 miles over approximately nine years represents an annual usage rate of around 13,862 miles, which is exceptionally high for a 2017 model, especially given that many similar cars in this age bracket accumulate far fewer miles. Such rapid mileage accumulation accelerates wear on consumables like tyres, brakes, and suspension components, as evidenced by the repeated MOT findings. The absence of significant mileage gaps—particularly in the past two years—implies either heavy daily use or a lack of regular servicing, both of which accelerate mechanical degradation. The oil leak advisory from 2024 and the play in the steering rack joint further reinforce the need for closer inspection of the drivetrain and steering system, as these issues can escalate into costly failures if not addressed promptly. Given the vehicle’s high mileage and the recurring MOT advisories and failures, the buyer should conduct a thorough pre-purchase inspection focusing on the suspension, brakes, and tyres. First, visually inspect the rear shock absorbers for signs of further fluid loss or damage, as their failure could lead to a loss of control during cornering or braking. Listen for unusual clunks or rattles in the suspension during a test drive, particularly when the vehicle is driven over bumps or at higher speeds, as these may indicate worn suspension bushes or broken coil spring mounts. Check the brake system for uneven wear on the discs or calipers, which could suggest binding or hydraulic issues, and listen for grinding noises when applying the brakes. The tyres should be closely examined for consistent wear patterns—sidewall cracking or perishing is another critical check, especially given the age of the vehicle, as this can compromise tyre integrity and safety. For fluid and component health, the buyer should verify the condition of the engine oil, transmission fluid, and brake fluid, ensuring they are within recommended levels and free from contamination. Given the high mileage, the 12V battery should be tested for capacity and cleanness of terminals, as standing vehicles can lead to corrosion or discharge over time. The steering system’s alignment should be checked to confirm there is no excessive play or binding, which could indicate wear in the inner joints or rack components. Additionally, the exhaust system should be inspected for leaks or corrosion, as the vehicle’s age and usage may have contributed to structural degradation. Finally, a review of the service history—particularly for suspension, brake, and tyre replacements—would provide further insight into the vehicle’s maintenance record and help identify any past neglect that may have contributed to the current state. If possible, a professional inspection by a qualified BMW specialist would be advisable to assess the full extent of the suspension and drivetrain wear.