2015 Audi A4 4.2L Petrol · VG02 AUS

Despite the modest 54,782 miles on the odometer, the mechanical story of this A4 is dominated by a single significant failure event in July 2025 which revealed several concurrent defects of varying severity. A dangerous nearside front tyre with exposed plies or cords, a major fluid leak from the nearside rear shock absorber, and headlamp aim issues on both sides were all identified on the same day, requiring an immediate retest the next day where the vehicle passed without recorded defects, indicating the issues were rectified. With passes recorded in 2024 and again in July 2026 with no advisories, the vehicle appears to have recovered well from that cluster of failures, though the nature of the defects suggests the car may have been subject to a period of neglect or component ageing prior to that point. The rear brake advisory from 2023, while minor, was an early indicator that the braking system was beginning to demand closer monitoring as the vehicle accumulated standing time. At roughly 4,980 miles annually over its eleven-year life, this A4 sits firmly in low-mileage territory for its class and age, a usage profile that often masks mechanical wear through inactivity rather than active use. The mileage progression across tests appears relatively stable, suggesting the car has likely seen a mixture of short journeys and extended periods of garaging rather than sustained long-distance motoring. Mechanically, this pattern typically shifts the primary concerns away from high-wear drivetrain components and towards items that degrade through standing: rubber components such as suspension bushes, shock absorber seals and gaiters can harden, perish, or weep fluid even with minimal mileage on them, which is directly relevant to the shock absorber leak flagged in 2025. Brake discs and callipers are particularly prone to corrosion and binding when a vehicle is used infrequently on short trips, and the 2023 advisory regarding a fluctuating offside rear brake hints at exactly this type of irregular contact pattern. A prospective buyer should pay particular attention to the condition of the suspension, especially given the recorded nearside rear shock absorber fluid leak. On a test drive, listen for clonking or knocking noises from the rear over uneven surfaces, particularly across speed bumps or potholes, and feel for excessive float or poor damping control during successive undulations in the road. Inspect the rear shock absorber bodies and surrounding coil springs for any signs of fresh oil residue, and check the nearside rear tyre shoulder for uneven wear which can indicate a weakened damper. The brake system also warrants a thorough functional check; with the 2023 fluctuating brake advisory in mind, test the pedal feel from cold and after several firm applications, noting any judder, pull to one side under braking, or a rear bias imbalance that could suggest a binding calliper sticking on or off. Given the confirmed tyre failure in 2025, a careful inspection of the remaining tyres and a spare if fitted is essential, looking closely for any cuts, bulges, or exposed cord, and checking that all four tyres are of matching brand, size, and tread depth, as mismatched fitments can mask handling issues. The headlamp aim issues, though a relatively straightforward adjustment on most Audis, are worth verifying by parking on level ground facing a garage door at night to confirm both beams sit symmetrically and at the correct height. Finally, given the low annual mileage, it is prudent to check the condition of the exhaust mounting rubbers, the auxiliary drive belt and tensioner for cracking, and the state of the coolant and brake fluid, as fluids that have sat unchanged for extended periods can degrade and lead to more costly downstream failures on a vehicle that otherwise presents in good cosmetic order.