2004 Audi A4 1.8L Petrol · M25 AAM

The latest MOT test for this Audi A4 was passed on 03 December 2025, however, the recent inspection history indicates a deteriorating maintenance trend. Following a clean pass in late 2024, the vehicle has recently accumulated several significant advisories and a failure related to headlamp aim. The shift from a defect-free status to multiple warnings regarding the braking system, exhaust, and electrical routing suggests that the vehicle is entering a phase of increased component fatigue and requires proactive mechanical attention to maintain roadworthiness. With 137,080 miles recorded over approximately 22 years, the vehicle has averaged roughly 6,231 miles per year. This level of usage is considered moderate and typical for its age, suggesting the vehicle has not been subjected to extreme high-mileage wear. However, the relatively low annual mileage can be deceptive; it often means the vehicle has spent significant time stationary, which can lead to age-related degradation of rubber components, such as suspension bushes and brake hoses, and can encourage corrosion on brake discs and calipers due to a lack of regular movement and cleaning. A prospective buyer should focus heavily on the braking system during a test drive. The recurring advisory for a binding offside rear service brake is a serious concern that may lead to overheating, reduced fuel economy, and uneven tyre wear. Listen for any scraping or dragging sounds from the rear of the car and check for excessive heat radiating from the offside rear wheel after a short drive. The reported corrosion on both rear brake hoses and the loose ABS wiring are also critical points; these should be inspected for structural integrity to ensure the hydraulic system and electronic braking assistance remain reliable and do not suffer a sudden failure. Furthermore, the advisory regarding a corroded exhaust with a small leak indicates that the exhaust system is nearing the end of its life and will likely require replacement to prevent further degradation or emissions issues. During the inspection, check the underside for any signs of significant structural corrosion and listen for any rattling that might indicate the loose heat shield or further exhaust fatigue. Given the age and mileage profile, it is also essential to verify the service history for time-based fluid changes, particularly brake fluid, as moisture ingress can accelerate the corrosion noted in the brake hoses. Finally, inspect the tyres for sidewall perishing or cracking, which is a common issue in vehicles with lower annual mileage.