2017 BMW 420 2.0L Diesel · C13 AAV

The most recent DVSA examination on 27 September 2025 resulted in a PASS, although two advisories were issued relating to tyre condition. Specifically, both the nearside front and nearside rear tyres were noted as slightly damaged or suffering from cracking/perishing, which is a common age-related finding on a vehicle of this profile. Reviewing the broader history, this 4 Series has passed every annual test consecutively since 2021 with no recorded defects prior to the 2025 tyre advisories, indicating a generally stable and well-maintained vehicle with no history of structural, braking, or suspension failures recorded against it. The transition from a completely clean record to advisories on two tyres at the same test is typical of a car entering its ninth year of service, where rubber components begin to degrade regardless of remaining tread depth. There are no advisories suggesting mechanical wear concerns such as corroded brake lines, worn suspension bushes, or exhaust issues, which is a positive indicator for a prospective buyer. With 76,545 miles recorded on a 2017 registration, this 420 has covered approximately 8,505 miles annually, placing it squarely within the typical usage bracket for its age. There are no unusual gaps or rapid accumulation periods evident across the five recorded MOTs, suggesting consistent rather than sporadic use, which is generally beneficial for keeping mechanical components, seals, and fluids in healthy working order. Consistent annual mileage reduces the risk of standing-related issues such as seized brake calipers, flat-spotted tyres, or internal corrosion in the exhaust system, all of which can afflict low-mileage or intermittently used vehicles. Conversely, this level of use implies normal wear on consumable items like brake pads and discs, clutches (if applicable), and drive belts, which should be inspected for remaining service life. For a nine-year-old BMW of this mileage, the recorded advisories warrant close physical attention. Tyre perishing or cracking, even when classified as slight, indicates the rubber compound is beginning to harden and lose flexibility, which reduces grip in wet conditions and increases the risk of sidewall failure under load. On a test drive, listen for any increase in road noise from the front axle, which can point towards deteriorating front tyres, and visually inspect the sidewalls for visible hairline cracks or bulging before purchase. Budgeting for a full set of four new tyres is advisable, particularly on a rear-wheel-drive BMW where rear grip is critical for stability, and ensure the replacements meet the vehicle's required sizing and speed rating specifications. Beyond the recorded tyre concerns, the clean MOT history means physical inspection should now focus on age-related items not necessarily captured during the standard test. The 12V battery in the boot or engine bay should be load-tested, as BMW electrical systems are sensitive to voltage drops and a weak battery can trigger warning lights and module coding issues. Check the underside and wheel arch liners for any developing corrosion, particularly around suspension mounting points and the rear subframe, as the 4 Series is known to be susceptible in this area. Brake discs should be examined for lipping and surface corrosion, and the fluid should be verified as recently changed, as brake fluid is hygroscopic and degrades over time regardless of mileage. Finally, request evidence of regular servicing, including oil changes, coolant renewal, and spark plug or coil pack replacement on the four-cylinder engine, to confirm the mechanical upkeep matches the favourable MOT trend.