2021 Audi A6 S LN Blck ED 40 TDI Mhev SA 2.0L Diesel · CJ21 NVF

The most recent DVSA MOT test for this 2021 Audi A6 S 40 TDI MHEV occurred on 2025-07-03, resulting in a clean pass with no recorded defects. However, the vehicle’s MOT history reveals a notable inconsistency: while two consecutive tests in 2024 (July 12 and July 2) were also passed without issues, the prior MOT on 2024-07-02 resulted in a failure, albeit without specific defects listed. This pattern suggests a potential underlying mechanical or maintenance-related anomaly that may have been either overlooked or temporarily masked during the failed test, warranting closer scrutiny of the vehicle’s service history and recent operational conditions. The absence of advisories or failures in the last two MOTs does not entirely dismiss the possibility of latent wear or a recurring issue, particularly given the vehicle’s age and mileage, so a thorough pre-purchase inspection is essential to confirm the absence of persistent problems. The recorded mileage of 90,376 miles for a 2021 model represents a relatively high annual usage rate of approximately 18,075 miles per year, which is elevated for its age. Such mileage accumulation typically accelerates wear on critical components such as the suspension system, brake assemblies, drivetrain elements, and internal combustion engine consumables. The significant gap between the 2024-07-02 MOT failure and the subsequent clean tests may indicate either a one-off event or a temporary operational deviation, but the overall trend suggests sustained, aggressive use. This could lead to accelerated degradation of suspension bushes, coil springs, and potentially binding calipers if the vehicle has been subjected to rough road conditions or prolonged periods of high load. Additionally, the high mileage may contribute to increased stress on the turbocharged 40 TDI engine, necessitating careful inspection of turbocharger health, oil system integrity, and exhaust emissions components to preclude long-term mechanical fatigue or failure. Given the MOT history’s mixed results and the vehicle’s high mileage, the prospective buyer should prioritise a comprehensive pre-purchase inspection that includes a thorough examination of the suspension and steering components. Pay particular attention to the front and rear suspension for signs of excessive play, clunking noises during cornering or over bumps, or uneven wear patterns on the tyres, which may indicate misalignment or worn control arm bushes. During the test drive, listen for any unusual grinding or rattling sounds from the suspension, and check for uneven tyre wear, particularly on the inner edges of the front tyres, which could signal camber issues or suspension failure. The brake system should also be scrutinised for signs of binding calipers, excessive brake dust accumulation, or corrosion on the brake discs, as high mileage can exacerbate these issues. Additionally, inspect the exhaust system for leaks, rust, or excessive backpressure, which may indicate turbocharger or catalytic converter problems common in high-mileage diesel vehicles. For a vehicle of this age and mileage, the buyer should also verify the service history to ensure compliance with the manufacturer’s recommended maintenance schedule, particularly for fluid changes, including the engine oil, differential fluid, and brake fluid, which should have been replaced at the 60,000-mile mark and again at 90,000 miles. Given the TDI’s turbocharged nature, check for any signs of oil dilution in the fuel system or turbocharger wear, as these are critical areas for high-mileage diesel engines. The battery should be tested for capacity and cleanliness, as prolonged idling or high mileage can accelerate corrosion in terminals or degrade the battery’s performance. Finally, inspect the vehicle’s exterior for signs of rust, particularly in the wheel arches, undercarriage, and around the rocker panels, as the high mileage and potential exposure to harsh conditions may have accelerated corrosion. If the vehicle has been stored for extended periods, check the tyre sidewall for signs of perishing or cracking, which can compromise structural integrity and roadholding.