2009 Audi A4 S Line TDI 2.0L Heavy oil · SD59 YFT

The vehicle currently presents a clean roadworthiness status following its most recent test on 09 January 2026 at 1,127,711 miles, which recorded no defects. This follows a period of significant mechanical scrutiny where the maintenance trend appeared to be improving after several years of recurring issues. While the vehicle has a history of frequent failures and advisories, the most recent two years of testing show that previous faults regarding lighting, suspension, and tyres have been addressed. The mileage profile is exceptionally high and indicates heavy commercial or long-distance use. Between the October 2025 test at 117,056 miles and the January 2026 test at 1,127,711 miles, the recorded mileage suggests an extreme discrepancy or a potential clerical error in the data entry, as it implies over a million miles were covered in just three months. Assuming the 2026 figure is accurate, the vehicle has averaged roughly 66,000 miles per year since 2009, which places immense stress on all drivetrain and chassis components. A prospective buyer must conduct a thorough physical inspection of the suspension and chassis. The record shows a persistent pattern of worn suspension arm pins and bushes, as seen in the October 2023 test at 103,258 miles, and earlier in 2021. There is also a long-standing advisory regarding light oil misting from the nearside rear shock absorbers dating back to 2020. Although the rear sub-frame was flagged for corrosion in 2021 and 2022, the absence of this advisory in the most recent tests suggests it may have been treated or is currently stable, but the structural integrity remains a primary concern given the vehicle's age and mileage. Braking components and lighting also require close attention. The vehicle has a history of pitted or scored brake discs and fluctuating service brakes, particularly noted in the October 2021 failure. While the lighting issues involving rear position and stop lamps were extensive during the October 2023 failure, the recent clean pass suggests these have been rectified. Focus should remain on the condition of the underbody to ensure that the previously noted sub-frame corrosion has not progressed.