2017 BMW 420 2.0L Diesel · TP13 SAM

The vehicle most recently passed its MOT on 26 August 2026 with no defects or advisories recorded, representing a clean and reassuring outcome at the point of test. Reviewing the broader history, the 420 has passed every annual test since first registration without any failure items, and the recorded advisories have been minor in nature and non-recurring, suggesting a stable and reasonably well-maintained trend. There is no evidence of escalating or repeating mechanical concerns across the seven test entries, which is a positive indicator for a prospective buyer, although the most recent advisory regarding shock absorber oil misting from the 2025 test warrants continued monitoring as it could develop into a more significant leak if the seal has deteriorated further over the intervening twelve months. With 92,555 miles recorded over approximately nine years, this 420 has covered roughly 10,284 miles annually, which sits comfortably within the typical usage band for a vehicle of this age and class. The mileage progression between tests is broadly consistent year on year, with no extended standing periods or sudden accumulations that would point to unusual use patterns. That said, at this odometer reading the car is well into mid-life for its drivetrain and chassis components, meaning consumable wear items such as brake discs, pads, suspension bushes, and the clutch or automatic transmission fluid will have either been replaced or be approaching the point of renewal. Any gaps in the service history relative to the recorded mileage should be clarified, as consistent annual servicing is important for a turbocharged BMW of this vintage. Given that the most recent advisories concerned a front fog lamp lens and light shock absorber oil misting, a prospective buyer should visually inspect the nearside front fog lamp for cracking, water ingress, or condensation, and confirm the unit still functions correctly. The front shock absorber should be inspected for any worsening oil seepage down the body of the unit or onto the surrounding coil spring, and during a test drive the car should be listened and felt for any clonking or knocking over uneven surfaces, reduced damping control, or excessive nose dive under braking, all of which would suggest the shock absorber seal has failed completely. The 2024 advisory regarding both rear tyres worn on the inner shoulder is also worth re-examining, as inner shoulder wear on a rear-wheel-drive BMW can indicate either incorrect wheel alignment following rear suspension component wear or simply that the alignment has been neglected; a four-wheel geometry check and inspection of the rear suspension bushes, control arm links, and thrust arms would be prudent before purchase. Beyond the recorded advisories, this nine-year-old example warrants thorough age-appropriate checks including close inspection of the tyres for sidewall cracking and perishing even if tread depth remains adequate, as rubber compounds degrade with calendar age regardless of mileage. The 12V battery should be load tested, as BMW electrical systems are sensitive to weak voltage and original batteries rarely last beyond six to seven years. Brake discs should be examined for lipping, corrosion, or binding calipers that can develop through standing or light use, and the handbrake mechanism should be verified for full release. Brake fluid, transmission fluid, and coolant should be confirmed as recently renewed in line with manufacturer schedules, as these are time-based services that degrade chemically even on low-mileage vehicles. Finally, a comprehensive pre-purchase inspection by a BMW specialist or independent garage, ideally with diagnostic access to read any stored fault codes from the engine, transmission, and electronic control modules, is strongly recommended to identify any latent issues that the MOT procedure alone would not necessarily detect.