2015 BMW 120 2.0L Diesel · LP55 BAZ

The vehicle presents a mixed roadworthiness profile, showing a worsening trend regarding drivetrain integrity. While the most recent test on 7 July 2026 at 95,294 miles resulted in a pass, the tester flagged a leaking rear differential. This follows a recurring pattern of oil leaks from the same component, first noted in the September 2022 test at 38,543 miles and again in the September 2024 test at 62,972 miles. Although the 2025 test showed no defects, the reappearance of the differential leak suggests the issue is progressing from a minor seepage to a more significant fault. The mileage accumulation appears consistent with a typical 11-year-old vehicle, averaging approximately 8,600 miles per year. The records show steady usage, moving from 24,303 miles in September 2020 to 95,294 miles in July 2026. There are no significant periods of long-term inactivity or sudden, excessive mileage spikes that would suggest irregular usage patterns. The vehicle has transitioned from a low-mileage commuter to a more standard mileage profile as it has aged. A prospective buyer must prioritise a physical inspection of the rear differential and surrounding drivetrain components. The recurring oil leak entries indicate that the seal or the unit itself is failing, which could lead to catastrophic mechanical failure if the oil level drops too low. I recommend checking for heavy oil staining on the underside of the chassis and verifying if the leak has worsened since the July 2026 test. Beyond the differential, the lack of recorded advisories for brakes, suspension, or tyres is positive, but the mechanical history implies a need for thorough scrutiny of all fluid levels and gaskets. Given the age and the specific fault identified, ensuring the rear differential has been properly addressed or replaced is essential to avoid significant repair costs shortly after purchase.