2021 Audi A4 S LN BLK ED 35 Tfsi Mhev SA 2.0L Petrol · YF71 AHA

The 2021 Audi A4 S Line in question presents a clean MOT history, with both the June 2025 test at 16,511 miles and the November 2024 test at 16,473 miles passing without any defects recorded. This indicates a stable maintenance trend, with no recurring issues or advisories to suggest neglect or progressive mechanical deterioration. The absence of even minor faults—such as tyre wear, fluid leaks, or suspension advisories—suggests the vehicle has been well-maintained or stored under controlled conditions. For a buyer, this level of compliance is rare for a car of this age and mileage, though it raises questions about whether the mileage reflects genuine low usage or potential odometer irregularities. The recorded mileage of 16,511 miles over five years is exceptionally low, averaging just 3,302 miles annually, which is well below the UK fleet average for a vehicle of this age. The gap between the two MOT tests—just 38 miles over six months—further implies either very light use or prolonged periods of inactivity. Such low mileage could mean reduced wear on consumables like tyres and brake pads, but it also raises the possibility of the car sitting unused for extended periods, which may accelerate battery degradation (particularly relevant for the MHEV system) or lead to fluid stagnation in the braking or cooling systems. Without additional service records, it’s impossible to confirm whether routine maintenance—such as oil changes or brake fluid renewal—has been adhered to. Given the spotless MOT history, a buyer should still conduct a thorough pre-purchase inspection, focusing on components that are less likely to be caught by the MOT but critical to long-term reliability. Priority should be given to the hybrid battery health, as low mileage can mask degradation; any warning lights or reduced electric-only range would be red flags. The suspension should be checked for stiffness or uneven wear, as infrequent use might not have stressed components enough for MOT advisories to appear. Brake binding or uneven pedal feel could indicate neglected fluid changes, and the exhaust system should be inspected for corrosion or leaks, especially if the car has been stored outdoors. Finally, the interior electronics—such as the infotainment system—might show signs of disuse, but this is purely cosmetic unless it affects safety-critical functions.