2017 Audi A4 Sport Ultra TDI 2.0L Heavy oil · WD66 USY

The 2017 Audi A4 Sport Ultra TDI has demonstrated a consistent roadworthiness record over its MOT history, with no defects or advisories recorded across the most recent four tests. The February 2025 pass at 71,087 miles confirms the vehicle remains within legal limits for suspension components, brake systems, exhaust emissions, and structural integrity. While the absence of recorded issues suggests the vehicle has been maintained at a basic level, the lack of advisories or defects does not preclude hidden wear—particularly in high-stress areas like turbocharger seals, suspension bushes, or rear axle bearings, which are common failure points in TDI engines after 90,000 miles. The most recent test date, just over five months ago, is acceptable but not ideal for a vehicle of this age, as it falls outside the optimal 12-month interval for thorough inspection. The mileage progression indicates typical usage for its age, averaging around 7,900 miles annually, with no abrupt spikes or prolonged periods of inactivity. The largest gap between tests occurred between February 2021 (31,965 miles) and October 2022 (50,172 miles), a 19,200-mile interval, though this still falls within the legal MOT cycle. The consistency in mileage suggests the vehicle has been driven regularly rather than left stationary for extended periods, which could have exacerbated issues like fuel system corrosion or suspension degradation. However, the absence of any advisories or defects in these intervals means there is no evidence of neglect or recurring mechanical failures. Given the clean MOT record, a prospective buyer should prioritise an independent inspection of the turbocharged diesel engine, focusing on oil leaks, carbon buildup in the DPF, and the condition of the intercooler and charge pipes—common failure points in TDI units at this mileage. The suspension should be checked for worn or leaking bushes, particularly at the rear, where Audi models often exhibit premature degradation. Brake discs and calipers, especially the rear, should be examined for uneven wear or binding, as the lack of advisories does not guarantee no underlying issues. Structural corrosion, particularly around wheel arches and sills, warrants scrutiny, as TDI vehicles are prone to rust in high-moisture environments. Finally, the exhaust system should be inspected for cracks or leaks, as these can lead to failed emissions tests or reduced performance.