2015 BMW M4 3.0L Petrol · S55 VEX

The vehicle’s most recent MOT test on 2025-12-27 confirms it remains roadworthy at 89,931 miles, with no defects recorded. While this suggests a stable maintenance trend since the last failure in 2024, the single critical suspension fault—specifically the fractured near-side rear coil spring—demands immediate attention. The absence of further advisories or defects in the intervening tests implies the issue was addressed promptly, but the 2024 failure indicates a non-trivial component failure that should have been replaced rather than merely repaired. Buyers should verify whether the spring was professionally replaced and that the rear suspension alignment was reset, as misalignment can accelerate wear on tyres and steering components. The mileage progression shows consistent usage, averaging around 8,176 miles annually, which is typical for a vehicle of this age. There are no concerning gaps or spikes in mileage, though the 2024 failure occurred just two days before the subsequent test, suggesting the owner may have prioritised urgent repairs. The most notable outlier is the 2023-to-2024 interval, where mileage increased by only 1,337 miles in a year—potentially indicating reduced usage or a period of storage. Without further context, this cannot be confirmed, but it contrasts with the steady accumulation in other years. Given the history, a buyer should prioritise a thorough inspection of the rear suspension, particularly the coil springs and associated bushes, as the 2024 failure suggests potential fatigue or manufacturing defects. The steering and suspension geometry should be checked for any signs of misalignment or uneven tyre wear, which could indicate incomplete repairs. Additionally, the brake system—while not directly flagged—should be scrutinised for binding calipers or excessive disc thickness variation, as high-performance models like this are prone to thermal warping and uneven wear. Corrosion around wheel arches and subframes should also be examined, as BMWs of this era are susceptible to rust in high-stress areas. Finally, the exhaust system and emissions should be verified, as the lack of advisories does not guarantee no leaks or catalytic converter degradation.