2012 Audi A8 3.0L Diesel · OU12 XBB

The vehicle remains roadworthy but the maintenance trend shows a concerning shift toward reactive rather than proactive upkeep. While the most recent test in December 2025 at 163,871 miles resulted in a pass, the presence of diesel fumes in the cabin and engine bay indicates a potential mechanical failure or exhaust leak that requires immediate attention. This follows a departure from the clean record seen in 2022, suggesting that the vehicle is now experiencing component degradation issues that were previously absent. The mileage pattern is consistent with a typical-use vehicle of this age, averaging approximately 11,700 miles per year. Between January 2024 at 153,552 miles and December 2025 at 163,871 miles, the car covered over 10,000 miles, showing steady usage. However, the gap of nearly a year between the January 2024 and January 2025 tests indicates irregular intervals between professional inspections, which can sometimes mask rapid wear and tear on a high-mileage Audi chassis. A buyer must prioritise inspecting the engine and exhaust system for the source of the diesel fumes noted in the latest test, as this could indicate a failing turbocharger or a cracked manifold. The previous report of uneven front tyre wear in January 2025 suggests potential alignment issues or worn suspension bushes which should be checked to prevent further premature tyre replacement costs. Additionally, the loose engine undertray mentioned in late 2025 needs to be secured to prevent damage to the aerodynamic components or underbody protection at higher speeds.