2016 BMW 520 2.0L Diesel · PL65 PMX

The most recent MOT, carried out on 12 August 2026, was passed but returned two advisories: a near‑side front tyre showing early cracking or perishing and rear brake discs that are worn, pitted or scored, though not yet structurally compromised. Over the preceding six years the vehicle has consistently passed without any recorded failures, indicating a generally stable maintenance regime. The emergence of these two advisories after a long period of clean results suggests that wear items are now reaching the point where proactive replacement will be required, rather than an overall deterioration in the car’s mechanical condition. At 99 943 miles recorded for a 2016 model, the car averages just under 10 000 miles per annum, which sits comfortably within the typical UK usage pattern for a ten‑year‑old saloon. There are no evident gaps in the mileage log that would imply prolonged storage, nor is there a spike in annual mileage that would accelerate component fatigue. Consequently, the wear observed on the tyre and brake discs is consistent with normal calendar‑driven degradation rather than excessive mileage stress, although the tyre’s age‑related perishing may be advanced by any periods of low usage. When inspecting the front tyre, look for visible cracks in the sidewall, dry rot, or bulges, and feel for any soft spots when applying pressure with the thumb. During a test drive, listen for a faint humming or thumping that could indicate uneven tread wear, and note any vibration at higher speeds that may be amplified by a compromised tyre structure. The rear brake discs should be examined for surface scoring, rust patches, or uneven wear patterns; a test‑drive brake pedal feel that is spongy, or a noticeable shudder when applying the brakes, would confirm that the discs are approaching the end of their service life. Replacing the front tyre and resurfacing or fitting new rear discs before the next service interval would eliminate the risk of a future failure and restore optimal braking performance. Given the vehicle’s age, also verify the condition of the suspension bushings and coil springs for any signs of corrosion, cracking or excessive play, especially when the car is pushed over bumps. Check the 12 V battery for electrolyte level, terminal corrosion and conduct a load test, as batteries over ten years often lose capacity. Inspect all fluid reservoirs – engine oil, coolant, brake fluid and power‑steering fluid – for correct levels, colour and any signs of contamination, remembering that many manufacturers recommend fluid changes on a calendar basis regardless of mileage. Finally, confirm that the service book contains regular oil changes, filter replacements and any scheduled timing‑chain or valve‑clearance work, as adherence to these time‑based services will be crucial to maintaining the long‑term reliability of the 520.