2012 Audi TT 2.0L Diesel · AV12 FNC

Corrosion on the rear axle and lower suspension arms, alongside a recurring oil misting issue on the offside rear shock absorber, represents the primary mechanical concern for this vehicle. The most recent MOT test on 29 August 2026 passed, but it highlights a trend of worsening suspension-related advisories. While the vehicle has maintained a passing status since a major failure regarding contaminated brake fluid in 2020, the recent escalation from a corroded coil spring to structural corrosion on the rear axle and both lower arms indicates that the chassis and suspension components are subject to progressive degradation. The vehicle has covered 166,933 miles over its 14-year lifespan, averaging approximately 11,924 miles per year. This mileage accumulation is consistent with typical UK usage for a vehicle of this age. Mechanically, this level of mileage suggests that high-wear components such as suspension bushes, dampers, and braking systems have undergone significant cycles of use. The steady mileage pattern reduces the likelihood of issues arising from long-term stationary periods, but it necessitates a close inspection of the drivetrain and chassis integrity due to the cumulative effects of road salt and mechanical fatigue over a decade and a half of operation. A physical inspection during a test drive should focus heavily on the rear suspension assembly to address the documented corrosion and shock absorber misting. Listen for any rhythmic knocking, clunking, or metallic banging sounds when driving over uneven surfaces or speed bumps, which could indicate that the corroded lower arms or the rear axle are losing structural rigidity. The light misting on the offside rear shock absorber should be monitored to see if it has progressed to an active leak; a failing damper may cause the rear of the car to feel unsettled, bounce excessively after bumps, or exhibit a lack of composure during cornering. Additionally, given the previous failure for contaminated brake fluid and the ongoing advisories regarding registration plate deterioration and wiper blades, the overall attention to consumable items should be verified. While the registration plate and wiper issues are minor, the historical brake fluid failure warrants a check of the braking system's responsiveness. During the test drive, pay close attention to the brake pedal feel for any sponginess or lack of firmness, and check for any pulling to one side under braking, which could suggest uneven caliper operation or issues within the hydraulic circuit.