2009 Audi S4 Avant 4.2L Petrol · CB09 LSB

The most recent MOT test conducted in January 2026 resulted in a pass, although it noted a minor failure regarding a registration plate lamp and an advisory for wearing rear brake pads. When reviewing the broader history, the maintenance trend appears to be slightly declining. While the vehicle enjoyed several clean passes between 2019 and 2022, the emergence of recurring advisories concerning rear sub-frame and coil spring corrosion from 2023 onwards suggests that age-related structural degradation is becoming more prominent. The recorded mileage of 101,100 miles over seventeen years is notably low, averaging approximately 5,947 miles per year. While this suggests less mechanical wear on the drivetrain and engine internals compared to a high-mileage example, such low annual usage often indicates periods of prolonged standing or a history of short-distance journeys. This usage profile can be detrimental to rubber components, exhaust systems, and fluid stability, often leading to premature perishing of seals and the accumulation of moisture within the braking and cooling systems. Prospective buyers must pay close attention to the recurring advisories regarding the rear sub-frame and coil springs. A physical inspection of the rear chassis is essential to determine if the corrosion is merely superficial or if it is beginning to compromise the structural integrity of the mounting points. During the test drive, listen for metallic clunks or knocks when traversing uneven road surfaces, as this may indicate that the corroded springs or associated suspension bushes have deteriorated beyond the point of an advisory. Furthermore, the 2024 note regarding perishing tyres should prompt a thorough check of all current tyre sidewalls for fine cracking, which occurs when rubber ages and loses its elasticity. The latest advisory regarding thin rear brake pads indicates that a brake service is now due. You should inspect the brake discs for heavy corrosion or significant lipping, which is common in low-mileage vehicles that have stood for long periods. It is also advisable to check for binding calipers that may cause the vehicle to pull or the wheels to run hot after a drive. Given the vehicle's age, ensure the service history reflects calendar-based fluid changes rather than solely mileage-based intervals, as oil and coolant degrade over time regardless of distance travelled. Finally, verify the health of the 12V battery, as infrequent use often leads to premature battery failure.