2020 BMW M135I Xdrive Auto 2.0L Petrol · AV69 TZX

The most recent MOT test on 8 July 2026 resulted in a pass, but this outcome must be viewed in proper context given the immediate preceding test one day earlier on 7 July 2026 which recorded a fail with three dangerous defects relating to tyre tread depth and brake pad wear on both axles, alongside a minor windscreen damage advisory. The vehicle was clearly brought back into a compliant state through replacement of the tyres and brake pads prior to the retest, and the only item carried forward from the failure is the minor windscreen damage. Looking at the wider trend, the 2025 test recorded an advisory that the rear brake pads were wearing thin, which directly correlates with the subsequent dangerous brake pad failure, indicating that the wear progression was flagged but evidently not addressed promptly. The front pads were not previously flagged, suggesting the front braking wear accelerated more suddenly or was missed between tests. This represents a deteriorating condition that has since been rectified, but the pattern warrants close attention to the broader braking system and any underlying cause of accelerated pad wear such as binding calipers or fatigued pistons. The recorded mileage of 64,983 miles over approximately six years equates to an annual average of around 10,830 miles, which is broadly typical for the UK and suggests consistent regular use rather than long periods of standing or excessive high-mileage accumulation. This kind of usage pattern is generally favourable for mechanical longevity as it keeps fluids circulating, prevents corrosion from settling on brake components, and avoids the drying and perishing issues associated with low-mileage or stored vehicles. There are no significant gaps in the recorded MOT history, with tests completed in January 2023, November 2023, July 2024, June 2025, and twice in July 2026, indicating a continuously roadworthy vehicle that has been kept in active service throughout its life. The mileage progression across these tests, while not stated in exact figures, appears steady based on the consistent annual test frequency. For a prospective buyer, the most important area to scrutinise given the recent MOT history is the braking system in its entirety. While new pads have clearly been fitted on both axles, it is essential to confirm that the brake discs were also inspected or replaced as required, because fitting fresh pads onto worn or scored discs significantly reduces braking efficiency and accelerates the wear of the new friction material. On a test drive, listen for any scraping, grinding, or pulsation through the brake pedal, and check for pulling to one side under braking which would suggest a seized or binding caliper, a known issue on BMW applications including the M135i. Inspect the discs visually for lipping around the outer edge, scoring, or bluish heat discolouration, and verify that the handbrake holds the vehicle securely on an incline as the rear caliper mechanisms on this model can be prone to sticking. Also examine the condition of the brake fluid, which should be a clear amber colour rather than dark brown, and request evidence of a fluid change within the past two years as brake fluid is hygroscopic and degrades over time regardless of mileage. Beyond the braking system, the minor windscreen damage noted on the latest test should be examined to confirm it is a stable stone chip rather than a propagating crack, particularly given the vehicle's performance orientation and likelihood of motorway use where vibration and temperature changes can cause small chips to run across the windscreen. As a 2020 vehicle approaching six years of age, other age-related items deserve attention including the 12 volt battery which on BMW models is often located in the boot or engine bay and typically requires replacement around the five to six year mark; a weak battery can cause a cascade of electronic warnings and starting issues on this xDrive auto variant. Inspect all four tyres not only for tread depth but also for sidewall cracking or perishing caused by age, and verify that all four tyres are of matching make, tread pattern, and size as required by the xDrive all wheel drive system, as mismatched tyres can damage the transfer box and differentials. Check the underbody and wheel arch liners for corrosion, particularly around the suspension mounting points and exhaust hangers, and ask to see documented service history confirming timely replacement of the engine oil, coolant, and transmission fluid at the manufacturer specified intervals, as the ZF automatic gearbox in this model is particularly sensitive to fluid condition and neglect can lead to expensive mechatronic unit failure.