2008 Audi A6 3.0L Diesel · OV08 HOJ

The most recent MOT, dated 13 April 2023, resulted in a failure. The test recorded a dangerous condition on both front tyres with exposed ply or cords, a rear tyre below the legal tread depth, a major fault on the rear registration‑plate lamp and an excessively worn off‑side front anti‑roll‑bar linkage bush, alongside an advisory on the nearside front upper suspension arm. Earlier MOTs in 2022 and 2020 were clean, while from 2017 onward a pattern of progressive suspension‑arm wear advisories and tyre‑edge wear warnings emerged, culminating in the 2023 failure. The maintenance trend is therefore clearly deteriorating, moving from a period of no recorded defects to recurring wear items that have now reached a safety‑critical stage. At 184 611 mi the car averages just over 10 000 mi per year, which sits within a normal usage envelope for a 2008 model. The mileage does not suggest any prolonged periods of inactivity that might have hidden corrosion, but the cumulative distance is sufficient for significant wear on tyres, suspension bushings, brake components and engine accessories. The fact that the vehicle has logged a relatively steady annual mileage rather than a sudden surge indicates that wear has been gradual, yet the recent tyre and suspension failures show that the consumables are now at the end of their service life. A prospective buyer should give the front suspension a thorough inspection. The nearside upper arm pin or bush was flagged as worn in 2018 and again in 2023; the off‑side anti‑roll‑bar linkage bush is now beyond its limit. Look for any play when the steering wheel is rocked at a standstill, listen for clunking or knocking over bumps, and verify that the front wheels retain proper alignment without excessive toe change. The exposed‑ply front tyres are a serious safety issue – they must be replaced immediately, and the rear tyre with sub‑1.6 mm tread should also be changed. Verify that the rear registration‑plate lamp operates correctly and that the lamp housing is free of corrosion or cracked lenses. Beyond the immediate defects, the car’s age warrants a comprehensive condition check. Examine all four tyres for sidewall cracking or dry‑rot, a common problem after a decade of storage even with moderate mileage. Inspect the battery terminals for corrosion and have the 12 V battery load‑tested, as electrolytic degradation is typical after 15 years. Check the brake discs for surface rust, scoring or uneven wear that may indicate sticking calipers, and ensure the pads have adequate thickness. Finally, confirm that the service history shows regular oil and coolant changes; if the records are sparse, consider a full fluid flush and a timing‑belt inspection, as the original belt on many 2008 A6 engines is often due for replacement around the 100‑150 k mi mark.