2017 Audi Q7 3.0L Diesel · GX67 GME

The 2017 Audi Q7 passed its most recent MOT on 2025-12-22 at 99,034 miles, but the record reveals a worsening maintenance trend rather than a stable one. The tester flagged a Nearside Rear Oil leak and a rear differential output leak at that final test, both classified as minor. This is the third consecutive test to record a rear differential oil leak, with identical advisories appearing in January 2023 at 61,060 miles and October 2021 at 42,735 miles. A recurring fluid leak that persists across multiple annual inspections suggests the issue has never been properly rectified, only monitored. The vehicle has effectively been losing differential oil for at least five years. The mileage progression tells a coherent story. Between October 2021 and January 2023, the Q7 covered roughly 18,325 miles in 15 months. From January 2023 to December 2024, it added 26,863 miles over nearly two years. The final recorded jump from December 2024 to December 2025 shows just 1,111 miles added in 12 months, a sharp drop that may indicate the vehicle has been standing for extended periods or used only for short trips. This uneven usage pattern is worth noting because prolonged standing can accelerate suspension bush perishing, brake disc surface corrosion, and tyre sidewall deterioration. Buyers should inspect the rear differential and axle area thoroughly. A persistent output seal leak, if left unresolved, can lead to differential bearing failure or, in the worst case, loss of drive to the rear wheels. Check the underside of the rear subframe and suspension arms for corrosion, particularly given the vehicle's age and the possibility of long stationary periods. The brake disc wear advisories recorded in January 2023 across all four corners suggest the braking system was already showing significant wear at 61,060 miles. Verify whether discs and pads have been replaced since then, as the record shows no subsequent advisory on brakes, which could mean either replacement or that wear has plateaued under the low mileage seen in the final year. Tyre condition also demands attention. Both rear tyres were flagged as worn to 3mm and wearing on the edge in January 2024 at 74,762 miles, indicating possible rear wheel alignment issues or worn rear suspension bushes causing uneven camber. Inspect the inner and outer edges of all four tyres for uneven wear patterns. Given the vehicle's weight and the Quattro drivetrain, tyre and suspension condition are closely linked. A pre-purchase inspection by a qualified technician, focusing on the rear differential, rear suspension geometry, and underside corrosion, is strongly recommended before committing to this vehicle.