2018 Audi Q5 S Line TDI Quattro S-A 2.0L Diesel · SR18 OUN

The 2018 Audi Q5 S Line TDI Quattro S-A presents a stable and improving maintenance trend, culminating in a clean pass on 3 December 2025 at 70,915 miles with zero defects recorded. That outcome is particularly significant because it follows a failure just hours earlier on the same day at 66,708 miles, where the tester flagged Nearside Rear Brake pad(s) worn below 1.5 mm. The immediate retest pass confirms the issue was rectified promptly, suggesting the previous owner addressed the defect without delay. Prior to that isolated brake wear event, the record shows four consecutive clean passes stretching back to March 2023, indicating consistent baseline upkeep across multiple test cycles. The mileage accumulation of roughly 8,864 miles per year over eight years sits squarely within typical usage for a vehicle of this age and class. The intervals between tests reveal steady annual progression: 54,744 miles in March 2023, 60,809 miles in March 2024, 66,708 miles in March 2025, and 70,915 miles by December 2025. There are no suspicious gaps or sudden spikes in accumulation that would suggest long periods of disuse or odometer anomalies. The record is clean and well-documented, with no advisory items noted at any point across the entire history. Despite the otherwise spotless record, the March 2025 failure on rear brake pads warrants attention during any in-person inspection. Buyers should examine the condition of all four brake calipers for signs of binding, particularly the nearside rear, and check the thickness of remaining pad material across all corners. Uneven wear between nearside and offside rear pads can indicate a sticking caliper slider or a seized handbrake mechanism, both common on Quattro variants. The rear brake discs should also be measured for minimum thickness and inspected for lipping or scoring. Beyond the braking system, a thorough underbody inspection is advisable given the vehicle's age and the typical wear profile of a Quattro all-wheel-drive diesel at this mileage. Check the front and rear suspension bushes, drop links, and anti-roll bar links for play or deterioration. The exhaust system, including the DPF and associated sensors, should be assessed given the TDI powertrain's sensitivity to short-journey use. Structural corrosion around the subframes, sills, and inner wing arches deserves close scrutiny, as does the condition of the Haldex coupling service history, which is not captured in MOT records but is critical to Quattro drivetrain longevity.