2016 BMW 420 2.0L Diesel · YF66 VJX

The 2016 BMW 420 holds a valid MOT certificate issued on 24 April 2026 at 86,433 miles, following a failure the previous day. That retest pass confirms the immediate safety-critical defects were rectified, but the maintenance trend over the last three years is mixed rather than consistently stable. A recurring advisory for worn, pitted, or scored front brake discs appeared in April 2024 at 72,356 miles and again in April 2026 at 86,433 miles, suggesting either persistent disc corrosion from light use or a pattern of deferring brake servicing until the MOT flags it. The April 2026 failure also revealed a malfunctioning tyre pressure monitoring system, insufficient washer fluid, and a rear axle with mismatched tyre sizes, indicating basic checks were overlooked before presenting the car for test. The 2025 test at 80,137 miles was entirely clean, which contrasts sharply with the neglect evident a year later. The mileage progression is broadly consistent with roughly 8,600 miles per year, a typical annual distance for a car of this age. Between April 2023 at 58,118 miles and April 2024 at 72,356 miles, the car covered approximately 14,200 miles in twelve months, a notably higher annual rate than the longer-term average. From April 2024 to April 2026 the mileage increased by only 14,077 miles over two years, closer to 7,000 miles annually, suggesting either lighter use or a change of ownership pattern during the most recent period. There is no evidence of mileage anomalies or gaps in the record, and the service history implied by the MOT entries alone is sparse, relying solely on annual test outcomes rather than documented servicing. Buyers should inspect the braking system carefully. The repeated advisory on front discs, combined with a 2024 advisory on rear discs, points to a car that may spend long periods stationary, leading to surface corrosion rather than even wear. Check disc thickness, lip condition, and pad depth, and test for binding calipers or uneven braking effort on a road test. The mismatched rear tyres flagged in April 2026 need verification that a correct matching pair is now fitted and that the tyre pressure monitoring system sensors are functional and correctly coded. Beyond the MOT items, examine suspension bushes, coil springs, and drop links for deterioration, particularly given the higher mileage years. Inspect the subframes, inner wing arches, and sills for corrosion, as BMWs of this generation can develop structural rust around drain holes and jacking points if not maintained. A full electronic diagnostic scan is advisable to confirm no stored fault codes remain after the recent TPMS repair.