2021 BMW 520D M Sport Mhev Auto 2.0L Electric diesel · LK21 HVR

The most recent MOT, carried out on 19 March 2024, was passed but returned two advisories concerning the rear tyres – both the nearside and the centre tyre were noted as being close to the legal tread limit and showing edge wear. No outright failures were recorded, indicating that the vehicle’s core systems – brakes, suspension, emissions and structural integrity – were deemed roadworthy at that time. With only a single MOT entry available, the maintenance trend appears neutral; the car has not exhibited any deteriorating defects, but the tyre wear advisories suggest that routine consumable monitoring is required to avoid future failures. At 41,612 miles after just over five years of age, the car averages roughly 8,300 miles per annum, which sits comfortably within the typical UK usage pattern for a premium executive saloon. The mileage does not point to excessive wear from high‑kilometre abuse, nor does it suggest prolonged periods of inactivity that might lead to age‑related degradation of rubber or metal components. Consequently, the drivetrain, gearbox and engine internals are likely to have experienced moderate loading, meaning that wear on items such as the timing chain, fuel injectors and clutch (if manual) should be within normal expectations for a 2021 model. The tyre advisories merit immediate attention. Inspect the tread depth on all four wheels, ensuring it exceeds the legal 1.6 mm minimum and ideally remains above 3 mm for optimal grip, especially in wet conditions. Look for uneven wear patterns, cupping or sidewall cracking, which can indicate misalignment, worn suspension bushes, or ageing rubber. A professional wheel‑alignment check should be performed after any tyre replacement, and the condition of the rear suspension – particularly the rear coil springs, dampers and anti‑roll bar links – should be examined for any play or leaking fluid that could exacerbate tyre wear. On a test drive, listen for clunking over bumps, feel for any pull to one side, and monitor for vibrations that may signal tyre imbalance or worn bearings. Given the vehicle’s age, even with modest mileage, time‑based maintenance is advisable. Verify the service book for evidence of regular oil and filter changes, and confirm that the synthetic engine oil has been refreshed at the manufacturer’s interval (typically every 15 000 miles or 12 months). The 12‑volt battery, now five years old, should be stress‑tested for cranking voltage and inspected for any corrosion on the terminals. Check the brake discs for surface rust or glazing and the pads for remaining thickness; a slight pulsation on heavy braking could indicate warped discs that may need resurfacing or replacement. Finally, examine all fluid reservoirs – coolant, brake fluid, power‑steering and DSG (if equipped) – for correct levels and any signs of contamination, as fluids degrade over time regardless of mileage. Replacing the rear tyres promptly, coupled with a comprehensive pre‑purchase inspection covering these points, will place the car in a sound condition for the next MOT due in March 2025.