2004 Audi A6 3.1L Petrol · SN04 LMG

The vehicle currently holds a roadworthy status but the maintenance history reveals a pattern of structural and mechanical neglect. While it passed its latest test in July 2025 at 194,704 miles, this followed a significant failure just months prior due to an engine management light fault and a front oil leak. The trend appears unstable, as the 2024 failure highlighted multiple critical failures across braking, suspension, and structural integrity, suggesting that repairs are only addressed when legally necessary rather than as a preventative measure. At 194,704 miles over 22 years, the Audi has averaged approximately 8,850 miles per year, which is consistent with typical usage for a vehicle of this age. The record shows consistent annual testing with roughly 5,000 miles covered between June 2024 and July 2025. However, the high mileage places immense stress on age-related components such as the drivetrain, suspension bushings, and braking system, particularly given the recurring issues with corrosion in the sills and sub-frame. A buyer must conduct a thorough physical inspection of the chassis and lower sills. The 2023 record notes that both sills were heavily welded, and the 2024 test flagged excessive corrosion on suspension mounting areas, which indicates a history of advanced structural rust that may continue to spread. The buyer should also inspect the rear sub-frame for further degradation, as previous tests confirmed corrosion present but not yet at a critical stage. The braking and suspension systems require close scrutiny. The 2024 failure recorded poor parking brake efficiency, imbalanced rear brakes, and thin pads, followed by a fractured offside front coil spring. Although these were reportedly rectified, the presence of a front oil leak noted in July 2025 must be monitored to ensure it does not escalate into a major engine failure. The engine management light should also be checked with a diagnostic tool, as its previous failure suggests a potential underlying sensor or electronic issue that remain unresolved.