2017 BMW 420 2.0L Diesel · YA17 AAU

The vehicle presents a worsening maintenance trend characterized by an increasing frequency and variety of advisories. While it passed its most recent test on 26 February 2026 at 110,256 miles, the inspector flagged multiple issues including worn suspension arm bushes on both sides, light oil misting from the nearside front shock absorber, and inner tyre wear approaching legal limits. This follows a pattern established in the March 2025 test at 95,819 miles, where similar suspension bush issues and brake wear were noted. The transition from a clean record in March 2024 to multiple mechanical advisories suggests that component degradation is accelerating as the vehicle reaches higher mileages. The mileage accumulation is significant for a 2017 model, averaging roughly 12,250 miles per year. The data shows a steady increase in usage, with the vehicle covering over 14,000 miles between the March 2025 and February 2026 tests. This high-use profile explains the rapid wear of consumable items. A notable outlier occurred in November 2023 at 80,379 miles, where the tester recorded a TPMS light and a slight leak from the rear differential. Although the differential leak did not result in a failure, it indicates a potential area of mechanical concern that requires monitoring. A prospective buyer should prioritize a physical inspection of the front suspension system. The recurring advisories for worn suspension arm pins and bushes since 2025, combined with the recent oil misting on the nearside front shock absorber, suggest the front end is nearing a period of required component replacement. The brake system also requires scrutiny; the record shows a progression from thin pads in 2021 and 2025 to worn rear discs in the most recent 2026 test. Tyre condition and alignment also warrant attention. The most recent test noted inner tyre wear on both front tyres, which often indicates incorrect camber or toe settings resulting from the aforementioned suspension wear. Given the high mileage and the specific mention of the rear differential leak in 2023, a thorough check of all fluid levels and the condition of the drivetrain seals is advisable to ensure no significant leaks have developed since that time.