2018 BMW 420 2.0L Petrol · RY18 AFN

Consistent roadworthiness has been the defining characteristic of this vehicle, which successfully navigated its most recent MOT inspection on 5 November 2025 without a single recorded defect. The history reflects a stable trend, with the only notable mechanical observations emerging between 2023 and 2024. While the vehicle has maintained a clean record for the majority of its testing life, the presence of specific component advisories in recent years necessitates a focused inspection of the drivetrain and tyre contact patches to ensure that previous minor issues have not progressed into more significant faults. Accumulating 55,900 miles over an eight-year period results in an average of approximately 6,988 miles per annum, a usage profile that aligns with typical expectations for this class of vehicle. The testing schedule is continuous, showing no significant gaps or periods of prolonged inactivity that would typically raise concerns regarding seized components or degraded seals. Because the mileage is neither exceptionally high nor unusually low, the mechanical wear should be viewed as standard for a BMW 4 Series of this age, with the primary focus remaining on the condition of high-load consumables that are expected to reach the end of their service life at this stage of the vehicle's lifecycle. Prospective buyers should prioritise a thorough inspection of the rear differential, which was noted for a slight mist of oil during the 2024 inspection. During your test drive, listen for any whining or grinding noises emanating from the rear axle, particularly when accelerating or decelerating at motorway speeds, as this can indicate internal seal degradation or fluid loss. Additionally, check the underside of the vehicle for any signs of fresh oil staining on the differential housing or nearby subframe components, as a mist can often be the precursor to a more persistent leak that may require seal replacement. Given the previous advisories regarding uneven tyre wear on the front axle, it is essential to inspect the inner and outer shoulders of the current tyres for consistent tread depth. Uneven wear patterns on these vehicles often point to misalignment or play in the front suspension control arms and bushes. While driving, pay close attention to the steering feel; any vibration through the steering wheel at speed or a tendency for the car to pull to one side during braking may suggest that the suspension geometry requires adjustment or that specific bushings have developed excessive play. Ensure the vehicle tracks straight on a level road surface and check that the steering remains responsive without any knocking sounds when traversing uneven road surfaces.