2004 Audi A6 1.9L Diesel · YJ53 ACT

The 2004 Audi A6 remains roadworthy after its most recent January 2024 test at 215,762 miles, but the maintenance trend is worsening rather than stable. The January 2024 pass followed a same-day failure for nearside headlamp aim set too high, while three front suspension arm ball joints showed slight play and carried straight through as advisories on the pass. Front suspension wear is now a confirmed recurring fault across three successive years of testing. Recorded mileage sits at 215,762 against a 22-year lifespan, an average of roughly 9,800 miles per year and typical for the age. The gap between the January 2023 test at 205,569 miles and December 2021 at 192,993 shows about 12,500 miles covered in that period, then only 10,193 miles to January 2024. A notable gap exists between December 2021 and January 2023 with no intermediate record, leaving the 2022 test absent from the history. A buyer should physically inspect all four front lower and upper suspension arm ball joints, as the tester flagged slight play on both lower arms and the nearside upper at 215,762 miles, having first noted worn nearside upper arm bushes back in December 2021. The nearside rear brake pipe showed corrosion protected by grease at both 2023 tests, a sign previous owners masked rather than replaced it. Headlamp aim and lens contamination caused repeated failures and advisories, suggesting casual pre-test preparation. The non-excessive oil leak logged at 205,569 miles was never cleared on later records and warrants underside inspection for engine or gearbox seal degradation at this mileage. Tyre sidewall failure in January 2023 indicates a neglected worn tyre was run to cord level. Given the corrosion, suspension play, and patchy history, a professional ramp inspection of subframe and suspension mounts is advised before purchase.