2004 Audi A4 4.2L Petrol · DF04 EWP

Recurring exhaust emissions failures and deteriorating steering and suspension components define the recent mechanical history of this vehicle. While it passed its last test on 20 June 2025, the record shows a pattern of failures related to carbon monoxide and lambda readings in 2024 and 2025, alongside a trend of worsening wear in the front end. This suggests a vehicle that has struggled to maintain emissions compliance and is experiencing progressive wear of its chassis components. With 173,130 miles recorded over 22 years, the vehicle has averaged approximately 7,870 miles per year, which is typical for its age. This level of consistent usage means that high-wear items, including the drivetrain, suspension bushings, and braking system, have been subjected to standard long-term fatigue. The mileage is consistent with the observed wear on the anti-roll bar linkages and steering joints seen in the MOT history. Particular attention must be paid to the steering and suspension, as the latest test flagged play in the offside steering rack inner joint. During a test drive, listen for knocking or clunking sounds when traversing uneven surfaces or during low-speed manoeuvring. The history of failures and advisories regarding the front anti-roll bar linkages and upper suspension arm bushes indicates a vulnerability in the front-end geometry that may manifest as imprecise steering or instability under braking. The exhaust system has been a recurring point of failure, specifically regarding carbon monoxide and lambda levels. Check for an unstable idle or a lack of power during acceleration, which could indicate ongoing issues with the emissions system or fuel mixture. Additionally, the offside front tyre has been flagged as worn or worn on the edge across multiple tests since 2022, which often correlates with the steering rack play and suspension wear previously noted, potentially leading to accelerated and uneven tyre wear.