2016 BMW 420 2.0L Diesel · LL16 EXB

A pattern of brake wear advisories, punctuated by an isolated but serious structural tyre failure and a steering linkage defect, defines the mechanical record of this 2016 BMW 420. The most recent test on 10 October 2025 resulted in a pass, with the only observation being rear brake pads wearing thin, a continuation of the front and rear pad advisories noted at the prior test in June 2023. However, the intervening history is not without significant concern. In July 2024 the vehicle failed with a dangerous nearside rear tyre bulge caused by structural separation, a major windscreen washer fluid deficiency, and excessive play in the offside front track rod end ball joint. The same inspection recorded slight play in the steering rack as an advisory. The combination of internal steering rack wear and a track rod end defect suggests the steering system has been progressively deteriorating, while the recurring brake pad advisories across both axles indicate a steady and expected wear pattern rather than any single isolated component failure. The recorded mileage of 84,285 over an approximate ten-year span equates to around 8,400 miles annually, which sits squarely within typical parameters for a vehicle of this age and class. This level of accumulation is consistent with regular mixed-use driving rather than prolonged periods of standing or excessive high-mileage wear. Importantly, the MOT testing history shows no extended gaps that would imply the vehicle was off the road for multiple consecutive years, with tests recorded in 2023, 2024 and 2025. This consistent annual testing pattern, combined with moderate mileage accumulation, means that mechanical components have been exercised regularly, reducing the likelihood of seized brakes, perished rubber components, or dried seals associated with long-term storage. For a prospective purchase, particular attention should be directed to the steering system given the advisory for steering rack play and the failed track rod end ball joint in mid-2024. On a test drive, listen for any knocking or clonking noises from the front end when traversing speed bumps or uneven road surfaces, and feel for any vagueness, looseness, or delayed response in the steering, particularly around the straight-ahead position or during slow-speed manoeuvres. Inspect the offside front track rod end and its gaiter for any signs of fresh replacement, and verify that a receipt or invoice exists for the repair, as a failing track rod end at MOT is a serious safety concern. The steering rack itself, with its noted internal play, should be monitored for any worsening, as rack replacement on a BMW of this era can be a costly repair. Brake system condition warrants close scrutiny given the recurring advisories across all four corners. With rear pads noted as wearing thin in October 2025, replacement is likely imminent, and the front pads previously flagged in 2023 should also be checked for remaining thickness. On the test drive, apply the brakes firmly from around 40 mph and listen for any grinding, squealing, or juddering through the pedal, and check for any pulling to the left or right under heavy braking which could indicate a binding caliper or uneven pad wear. Visually inspect the brake discs for lipping, scoring, or corrosion around the outer edge, and confirm that the flexible brake hoses and rigid brake pipes are free from any corrosion or weeping, particularly along the underbody where road salt exposure is common. Finally, confirm the correct operation of all exterior lighting, including the side repeaters which were flagged as inoperative at the 2023 test, and ensure the windscreen washer system is fully functional with an adequate reservoir level.