2016 BMW 420 2.0L Diesel · LS66 DWL

The latest MOT test for this 2016 BMW 420i occurred on 2025-10-03, resulting in a clean pass with no recorded defects, following a consistent pattern of passing all previous MOTs from 2019 through 2024. The vehicle’s maintenance history demonstrates a stable and reliable roadworthiness profile, with no evidence of recurring mechanical failures or progressive deterioration. The absence of failures beyond the single advisory noted in 2021 suggests that the owner has maintained the vehicle appropriately, though the advisory itself—near-side rear tyre wear close to the legal limit—indicates a need for closer attention to tyre management, particularly if the vehicle is subjected to regular high-speed or aggressive driving conditions. The recorded mileage of 65,723 miles for a vehicle aged approximately ten years represents a moderate annual usage rate of around 6,572 miles per annum, which is within the expected range for a BMW of this class under typical UK conditions. This level of mileage does not necessarily indicate excessive wear, but it does warrant consideration of how the vehicle has been operated, including any prolonged periods of inactivity that could lead to standing corrosion or fluid degradation. A significant gap between the 2021 advisory and subsequent MOTs suggests the vehicle was likely not driven frequently during that period, which may have allowed minor issues to develop undetected or exacerbated by standing. For example, brake discs could have corrodated or calipers become bound due to lack of use, while fluids like brake fluid and coolant may have degraded over time, even without active wear. As a prospective buyer, the most critical areas to inspect during a physical examination are the tyres, particularly the near-side rear tyre mentioned in the 2021 advisory, which should be checked for tread depth and signs of uneven wear patterns that could indicate alignment or suspension issues. Listen for any unusual clunking noises from the rear suspension during cornering or braking, as this may signal worn suspension bushes or damaged coil springs. Inspect the rear brakes for corrosion on the discs or binding calipers, which could be exacerbated by prolonged periods of inactivity. The under tray advisory from 2020 suggests the vehicle may lack a protective undercover, which could expose the drivetrain and exhaust components to road debris and moisture over time; verify that the exhaust system is securely mounted and free from leaks, as corrosion or damage could lead to emissions failures or structural instability. Beyond the immediate advisories, the vehicle’s age and mileage make it prudent to check for signs of tyre sidewall perishing, which can occur even at moderate mileages due to prolonged exposure to UV light and temperature fluctuations. Test the 12V battery for voltage output when the engine is off and during a cold start, as BMWs of this era often require a healthy battery to manage the complex electronics and start reliably. Inspect the engine bay and underbody for signs of oil leaks, particularly around the valve cover, oil filter housing, and oil pan, as BMWs can develop leaks from worn seals or cracked gaskets over time. Finally, since the vehicle has not undergone a full service in recent years, verify that the service book records are up to date, particularly for fluid changes—such as brake fluid, coolant, and transmission fluid—which should be replaced at specified intervals (typically every 60,000–100,000 miles or every 5 years, whichever comes first). If the vehicle has been driven at a steady pace, the suspension and drivetrain components should not yet show significant wear, but a thorough inspection of the steering and alignment systems is recommended to ensure the vehicle remains safe and comfortable to drive.