2004 BMW 6 Series 4.4L Petrol · B6 AXC

Recurring oil leaks and deteriorating suspension components define the mechanical history of this vehicle, with the latest test on 12 January 2026 introducing a new concern regarding exhaust emissions. While the vehicle passed its most recent inspection, the advisory for blue smoke during acceleration suggests potential internal engine wear or oil consumption issues. This follows a long-term pattern of oil leaks flagged across multiple tests between 2018 and 2023, indicating a persistent issue with seals or gaskets. An average annual accumulation of approximately 4,071 miles over 22 years indicates a low-usage profile for a grand tourer of this era. Notably, there is a significant gap in the testing record between April 2019 and November 2023, suggesting the vehicle may have been stationary for several years. Such usage patterns often lead to the degradation of rubber components and the onset of surface corrosion on brake discs, both of which were previously noted in the MOT history. During a physical inspection and test drive, priority should be given to the engine combustion health and fluid integrity. The blue smoke noted in the 2026 test should be observed during hard acceleration to determine the severity of oil bypass. Check the engine bay and the ground beneath the vehicle for evidence of the recurring oil leaks mentioned in the 2018, 2019, and 2023 records. Any significant oil misting or pooling around the gaskets should be carefully evaluated. The chassis and steering systems require scrutiny due to a history of worn suspension arm bushes and a failed track rod end. Listen for knocks or clunks when driving over uneven surfaces and feel for any vagueness or pull in the steering wheel, which would indicate that the previously flagged suspension deterioration has progressed. Additionally, check the current condition of the rear tyres and the surface of the front brake discs to ensure that the corrosion and wear noted in previous years have been properly addressed.