2021 Audi S4 Black ED TDI Mhev Quattro A 3.0L Diesel · 750 RKL

The 2021 Audi S4 Black Edition TDI MHEV Quattro presents a clean MOT history over the past two years, with both the June 2024 (32,008 miles) and June 2025 (39,801 miles) tests passing without any defects or advisories. This indicates a stable maintenance trend, suggesting the vehicle has been well cared for by its previous owners in terms of compliance with basic roadworthiness standards. The absence of recurring issues—such as brake binding, suspension wear, or emissions failures—implies that major mechanical components have not deteriorated beyond MOT thresholds. However, the lack of advisories does not preclude the need for a thorough pre-purchase inspection, as some wear items (e.g., tyres, brake pads, suspension bushes) may still require attention even if not yet critical. The mileage accumulation of 7,800 miles annually is consistent with typical usage for a vehicle of this age, neither excessively high nor abnormally low. The gap between tests—approximately 12 months—aligns with the standard MOT frequency for a four-year-old car, and the mileage progression (7,793 miles over 12 months) shows no signs of rapid degradation or prolonged inactivity. The absence of multiple MOTs in a short period also suggests the car has not been subject to repeated failures, which could otherwise indicate neglect or unresolved mechanical issues. For a prospective buyer, the primary focus should be on consumable and wear items that, while not yet critical, may require imminent attention. Given the MHEV system, inspect the hybrid battery health and software for any pending updates or error codes, as these can degrade silently. Check the condition of the brake discs and pads—even without advisories, Audi’s high-performance brakes may show uneven wear or glazing under heavy use. The suspension, particularly the coil springs and anti-roll bars, should be scrutinised for signs of sagging or corrosion, especially on a Quattro model where drivetrain angles can accelerate wear. Finally, verify the tyre condition, including tread depth and sidewall integrity, as the last MOT did not record any advisories on them, which could imply they were borderline at the time of testing. While the MOT history is reassuring, the car’s age and performance-oriented nature mean a pre-purchase inspection by a specialist Audi technician is advisable. Pay particular attention to the drivetrain seals, differential fluids, and MHEV-specific components, as these are less likely to be flagged in a standard MOT but can lead to costly failures if overlooked. The clean record suggests the car has been maintained responsibly, but no MOT can fully substitute for a hands-on mechanical assessment.