2015 BMW 520 2.0L Diesel · YA65 WNX

The most recent MOT test completed on 15 December 2025 resulted in a pass, but the inspection revealed a concerning trend regarding the vehicle's braking system. While the car has maintained a consistent passing record over the years, the maintenance trend for consumables is currently worsening. The recent advisories for both thin rear brake pads and worn, pitted, or scored rear brake discs follow a pattern of recurring brake pad advisories dating back to 2021. This indicates that the braking components have been gradually wearing down over several inspection cycles without being replaced, and the vehicle is now approaching a point where significant maintenance is required to ensure continued safety and performance. With a recorded mileage of 89,566 miles over approximately eleven years, the vehicle has averaged roughly 8,142 miles per year. This is a typical usage profile for a vehicle of this age and type, suggesting it has not been subjected to extreme high-mileage motorway transit nor the excessive wear associated with very low-mileage, short-trip urban driving. From a mechanical standpoint, this moderate mileage means the engine and primary drivetrain components should be in a relatively stable condition, but the vehicle is entering a lifecycle stage where age-related degradation of rubber components, such as suspension bushes, coil springs, and coolant hoses, becomes a more significant factor than mileage alone. A prospective buyer should prioritise the immediate replacement of the rear brake pads and discs. During a test drive, pay close attention to the braking feel; any vibration or shuddering through the brake pedal when applying pressure may indicate warped or unevenly worn discs, while any grinding or squealing noises could suggest that the pads have worn down to the metal backing plate. You should also inspect the rear tyres for any uneven wear patterns, which can sometimes be a symptom of binding calipers or uneven braking forces. It is essential to confirm whether the rear calipers are functioning correctly and not sticking, as this can contribute to the premature scoring and pitting of the discs noted in the MOT history. In addition to the braking system, you should conduct a thorough inspection of the vehicle's underside for signs of structural corrosion or exhaust degradation. Given the age of the vehicle, check the tyres for any signs of perishing or sidewall cracking, which can occur if the vehicle has been parked for extended periods. It is also highly recommended to verify the service book for evidence of time-based fluid changes, specifically brake fluid and coolant, as these fluids degrade chemically over time regardless of mileage. Finally, check for any evidence of oil or coolant leaks around the engine block and under trays to ensure that age-related seal degradation has not become a significant issue.