2018 Audi A6 2.0L Diesel · YG18 AAC

The most recent MOT, dated 23 July 2026, resulted in a failure. The test recorded a major fault with the engine management indicator lamp being inoperative or signalling a malfunction, together with excessive wear on both near‑side and off‑side front lower suspension arm pins or bushes. This represents a clear deterioration from the preceding three years, during which the car passed its MOT without any recorded defects, apart from routine advisories about under‑tray fittings. The emergence of two serious mechanical issues in a single test suggests that the vehicle’s maintenance condition is now worsening and requires immediate remedial work before it can be considered road‑worthy. At 90 200 miles the 2018 Audi A6 has accrued an average of roughly 11 300 miles per annum. This annual usage sits comfortably within the typical UK range for a vehicle of its class and age, indicating that the car has not been subjected to extreme short‑trip abuse or unusually high mileage stress. There are no obvious gaps in the recorded mileage that would imply long periods of inactivity, so the wear on consumables such as tyres, brake pads and fluid seals is likely to be consistent with its calendar age rather than being accelerated by excessive mileage. The engine management fault must be investigated with a full OBD‑II scan to retrieve any stored diagnostic trouble codes. An inoperative MIL can mask underlying sensor failures, emission‑control problems or ignition issues and may lead to poor fuel economy, rough running or a failure to meet emissions limits. On a test drive the buyer should listen for irregular idling, hesitation on acceleration, or any warning lights that illuminate intermittently. A qualified workshop should verify the operation of the crankshaft position sensor, oxygen sensors and the catalytic converter, and replace any faulty components before the vehicle is re‑tested. The front lower suspension arm bush wear is a safety‑critical concern. Excessively worn bushes will allow movement of the control arm, producing clunking noises over bumps, a vague steering feel and uneven front‑tyre wear. The buyer should check for play by rocking the front wheels at the 12 o’clock position and feel for any looseness in the steering column. Reconditioning or replacement of the front lower arm bushes, together with a visual inspection of the rear suspension for similar wear, is advisable. Given the car’s eight‑year age, the buyer should also examine tyre sidewalls for cracking or perishing, assess the 12 V battery’s cranking performance, verify that brake discs are free from severe rust or scoring, and confirm that all service‑book stamps are present for scheduled oil, coolant and transmission fluid changes. Addressing these time‑related items alongside the identified faults will bring the vehicle back to a reliable and road‑worthy condition.