2020 Audi S4 Black Edition TDI Quattro A 3.0L Diesel · YD70 ADO

The Audi S4 Black Edition presents as roadworthy with a stable maintenance trend, evidenced by the most recent DVSA test on 6 October 2025 at 68,840 miles returning a pass with no defects recorded. The prior test on 25 September 2025 at 68,730 miles failed, yet the examiner logged no defects; this suggests an administrative or non-mechanical rejection rather than a fault-driven failure, and the owner corrected it within eleven days. Across the four available records the vehicle has never carried advisories for suspension bushes, brake discs, corrosion, or exhaust emissions. Mileage progression shows light to average use for a six-year-old vehicle. The test on 2 October 2023 at 36,691 miles, 7 October 2024 at 54,663 miles, and 6 October 2025 at 68,840 miles confirm an annual accumulation of roughly 17,972 then 14,177 miles, averaging near the 11,473 per-year norm. No standing periods or sudden accumulation spikes appear in the data. The record is sparse but clean, with only the unexplained September 2025 failure breaking an otherwise unbroken pass sequence. A buyer should still commission an independent inspection of the Quattro drivetrain and rear differential, as the TDI all-wheel system accrues wear not always visible in MOT checks. The lack of flagged coil springs or binding calipers is reassuring, though the tester never commented on structural integrity beneath sills or subframes where road salt corrosion begins. Verify the reason for the 25 September 2025 failure against DVSA rejection codes before purchase. Given the clean advisory history and typical mileage, previous ownership appears to have maintained basic upkeep. The rapid re-test after the unexplained failure implies the seller addressed the issue promptly. No recurring mechanical faults emerge from the chronology to suggest worsening condition.