2017 BMW 6 Series 3.0L Diesel · KA54 AAS

The most recent MOT history for this 2017 BMW 6 Series shows a stable but concerning pattern, with the vehicle failing twice in quick succession in March 2026—despite no defects being recorded on either test. This anomaly suggests either a technical oversight in the inspection process or, more likely, that the tester overlooked critical issues during the failed attempt. The subsequent pass in March 2026 at 76,699 miles indicates no substantive repairs were made between the failures, as the mileage remained unchanged. While the absence of defects in prior tests (March 2025, March 2024) suggests no recurring mechanical failures, the repeated failures in 2026 warrant scrutiny, particularly if the same components were involved. The vehicle’s mileage progression—from 61,228 miles in March 2024 to 76,699 miles in March 2026—represents approximately 15,471 miles annually over the past two years, a rate slightly above the average for its age. This suggests consistent use rather than neglect, though the lack of intermediate MOTs or service records means there is no visibility into whether major components like suspension bushes, coil springs, or drivetrain elements were serviced or replaced. The abrupt jump from 67,556 to 67,557 miles between the 2025 failures implies the vehicle was not driven between those tests, which could indicate a temporary storage period or a deliberate delay in testing rather than mechanical failure. Given the repeated MOT failures in 2026 without recorded defects, a buyer should prioritise an independent inspection of high-wear areas that often trigger failures, such as the braking system—particularly rear calipers or binding mechanisms—and suspension components, including worn bushings or corroded spring mounts. The absence of advisories or defects in prior tests does not preclude underlying issues, so close examination of the exhaust system for leaks or excessive corrosion, as well as the structural integrity of the underbody and wheel arches, is essential. The 2017 BMW 6 Series is prone to electrical gremlins and hydraulic failures, so the brake fluid condition, power steering reservoir, and cooling system should also be verified. The lack of a clear maintenance history makes these checks critical to assessing whether the vehicle has been properly cared for beyond the MOT threshold.