1990 BMW 6 Series 3.5L Petrol · G217 WAV

The vehicle presents a concerning maintenance trend that appears to be worsening despite the most recent pass on 10 April 2026 at 155,161 miles. While the car passed its latest test, the record shows a pattern of repeated failures involving critical systems. The tester flagged excessive carbon monoxide emissions in the April 2026 test, a recurring issue that has appeared in almost every failed inspection since June 2024. This persistent failure to meet exhaust emission standards suggests an ongoing combustion or sensor issue that has not been effectively resolved by previous repairs. The mileage profile indicates very low usage for a 36-year-old vehicle, averaging roughly 4,310 miles per year. This low usage is evident in the data, with the mileage only increasing by 101 miles between the July 2025 and April 2026 tests. Such infrequent driving often leads to secondary issues, such as the perished tyres noted in October 2021 and the various brake component failures seen recently. The long periods of inactivity likely contribute to the degradation of rubber components and the buildup of corrosion in the braking system. A prospective buyer must conduct a thorough physical inspection of the braking system and the underbody. The history shows significant instability in this area, with the July 2025 tests flagging corroded brake hose ferrules, corroded brake pipes, and a binding offside rear service brake. Although the April 2026 test passed, the recurring nature of these faults suggests that while individual components are being replaced, the underlying cause of corrosion or hydraulic failure may still be present. The presence of underseal mentioned in the 2025 and 2026 records indicates an attempt to manage structural integrity, but the effectiveness of this protection remains unverified. The engine and exhaust systems require immediate technical scrutiny. The repeated failures for excessive carbon monoxide emissions since June 2024, combined with a history of major exhaust leaks dating back to 2016 and 2020, point to a potentially problematic fuel mixture or exhaust manifold integrity. Additionally, the consistent presence of an oil leak, noted in nearly every test from 2020 through 2026, indicates a persistent weep that, while currently classified as non-excessive, requires monitoring to ensure it does not escalate into a major mechanical failure.