2004 Audi A4 1.8L Petrol · DF04 WSL

The most recent MOT on 1 May 2025 was passed, with a minor fault for an inoperative registration‑plate lamp and advisories noting the presence of an under‑tray and rust on several suspension components. Over the past decade the vehicle has consistently passed its tests, but the pattern of advisories – recurring corrosion of suspension parts, a worn front lower arm bush noted in 2020 and earlier tyre‑wear warnings – indicates a maintenance trend that is stable in terms of safety compliance yet shows a gradual build‑up of age‑related wear rather than an improvement. At 52 533 miles the car averages roughly 2 400 miles per year, which is markedly low for a 2004 model. Such limited annual usage often points to long periods of inactivity or very light duty, both of which can accelerate the ageing of rubber components, seals and fluids even while mechanical wear remains modest. The low mileage reduces the likelihood of high‑stress wear on the engine, gearbox and drivetrain, but it also raises the possibility of corrosion developing in hidden areas and of components such as bushings and mounts having been subjected to prolonged static loads. When inspecting the vehicle, pay particular attention to the front suspension. The 2020 advisory about a worn lower arm pin or bush suggests that the bushings may be approaching the end of their service life; feel for any clunking or looseness when applying pressure to the wheel at the 12 o’clock and 6 o’clock positions, and listen for squeaks when the steering is turned sharply at low speed. Examine the under‑tray and the underside of the chassis for rust, especially around the suspension mounting points, as the repeated “some suspension components are rusty” notes imply progressive corrosion that could eventually affect structural integrity. Verify that all exterior lighting, including the registration‑plate lamp, functions correctly, and check that the rear registration plate is legible and securely fixed, as previous advisories highlighted deterioration. Given the vehicle’s age and low mileage, also scrutinise the condition of the tyres – the sidewalls should be free of cracks, dry rot or bulges, and the tread depth should be well above the legal minimum; even if the tread appears adequate, tyres older than six years may need replacement regardless of wear. Inspect the brake discs for surface pitting or scoring and ensure the pads have sufficient thickness, as a 2014 advisory noted disc wear that may have progressed. Test the battery’s charge and assess for any signs of sulphation, since long periods of storage can weaken electrolyte performance. Finally, confirm that the engine oil, coolant, brake fluid and gearbox oil have been changed in accordance with a time‑based service schedule, as fluids degrade with age even when mileage is low, and any contamination could lead to premature component wear.