2017 BMW 420 2.0L Diesel · G24 CAE

The most recent MOT test on 2025-11-14 resulted in a clean pass, but the vehicle’s overall maintenance history reveals a pattern of recurring advisories that warrant cautious consideration. While the 2024-11-19 test was trouble-free, the 2024-11-18 failure highlighted critical issues—specifically, a nearside rear tyre with a structural separation that would have rendered the vehicle unsafe for road use. This failure, coupled with prior advisories on brake disc wear and shock absorber misting, suggests a maintenance trend that has not been fully resolved, indicating either suboptimal servicing or underlying mechanical degradation. The fact that the 2023-11-22 test still recorded light shock absorber misting reinforces the likelihood of ongoing wear in these components, which, if ignored, could lead to further instability or failure. The advisories on brake discs—though not excessively worn—demonstrate that the braking system has been subjected to consistent use, potentially accelerating wear in components like pads, calipers, or warping discs if not addressed. The vehicle’s mileage of 67,502 miles at nine years old is consistent with typical annual usage of around 7,500 miles, which is neither exceptionally high nor low for its age. However, the absence of a service history or mileage stamps beyond the MOT records complicates an accurate assessment of maintenance discipline. Lower mileage could imply periods of inactivity, which may have exacerbated issues like standing corrosion in the brake system, caliper binding, or fluid degradation in hydraulic components. Conversely, higher-than-average mileage would have accelerated wear on suspension bushes, tyres, and drivetrain elements, but the current figure does not suggest catastrophic overuse. The most critical implication is that the vehicle’s wear profile is influenced by both usage patterns and the effectiveness of past maintenance, with the 2024 tyre failure serving as a stark reminder of the risks of neglecting structural integrity. Given the recurring advisories on brake discs and shock absorbers, the prospective buyer should prioritise a thorough inspection of the braking system. Check for uneven wear patterns on the discs, which could indicate misalignment or warping, and listen for any grinding or squeaking when applying the brakes—symptoms of binding calipers or worn pads. Inspect the shock absorbers for any signs of excessive oil leakage or compression failure, which could be detected by a loss of ride control or clunking noises when driving over bumps. The nearside rear tyre failure suggests that the vehicle’s tyres should be replaced if they exhibit any signs of tread separation, cracking, or uneven wear, as this risk is not limited to the failed tyre. Additionally, the vehicle’s suspension should be examined for worn suspension bushes or broken coil springs, which could lead to a rough ride or alignment issues. For the buyer, the next critical steps involve addressing the identified advisories promptly. If the brake discs are excessively worn beyond the MOT advisory threshold, the pads or calipers may need replacement, and the discs should be inspected for warping or corrosion that could compromise braking performance. The shock absorbers with light misting should be serviced or replaced, as misting indicates internal damage that could lead to failure under stress. Beyond these immediate concerns, the buyer should verify the condition of the vehicle’s fluids, particularly the brake fluid, which should be checked for moisture contamination and replaced if necessary, as this can lead to corrosion in the braking system. Given the vehicle’s age and usage, a comprehensive inspection of the drivetrain, exhaust system for emissions compliance, and structural integrity—particularly around the wheel arches and suspension mounts—is also advisable. Finally, the buyer should consider a test drive to listen for any unusual noises, such as clunks from suspension issues, vibration from misaligned wheels, or pulling sensations that could indicate alignment or steering problems. If the vehicle has been stationary for extended periods, the brake system should be bled to ensure hydraulic pressure is restored and avoid binding.