2008 Audi A5 3.2L Petrol · SM08 VJU

An emissions-related failure and a documented crack in the catalytic converter represent the most immediate mechanical concerns for this vehicle, following a failed test on 27 August 2026. While the car achieved a pass on that same date after addressing the Lambda reading issue, the advisory regarding a minor exhaust gas leak from a crack in the nearside catalytic converter remains a pertinent point of interest. This follows a period of relatively stable testing between 2020 and 2025, though the history shows recurring issues with tyre degradation and brake disc condition, suggesting a pattern of components ageing due to environmental factors rather than high-frequency usage. The recorded mileage of 42,314 miles over approximately 18 years indicates a very low annual accumulation of roughly 2,351 miles. Such a low usage profile often results in components such as tyres and brake discs being subject to more age-related degradation, such as perishing or surface pitting, than wear-related degradation from high mileage. There is a notable gap in the testing history between October 2020 and September 2024, which, when combined with the low annual mileage, may indicate periods where the vehicle was not in regular use. Prospective buyers should pay close attention to the exhaust system during a test drive. Given the advisory for a crack in the nearside catalytic converter, listen for any unusual hissing, ticking, or increased engine note that could indicate the leak is worsening or causing further exhaust gas irregularities. The recent failure regarding the Lambda reading suggests the engine's ability to manage the air-fuel mixture was compromised, so monitoring for inconsistent idling or hesitation under acceleration is advisable to ensure the emissions system is functioning within specified limits. Attention should also be directed toward the tyres and braking components, which have appeared frequently in previous advisories. The history of tyres being flagged as cracking or perishing suggests the rubber may be hardening due to age. During a test drive, check for any vibration through the steering wheel or a pulsing sensation through the brake pedal, which could relate to the previously noted pitting on the front brake discs. Furthermore, given the 2019 failure involving a fractured offside front coil spring, a visual inspection of the suspension components for any signs of weeping from dampers or excessive movement in the bushes would be a prudent measure.