2016 Audi A4 2.0L Petrol · YA65 YEE

Recurring emissions issues and exhaust system integrity represent the primary mechanical concern for this Audi A4, following a failure on 12 August 2026. The vehicle has demonstrated a pattern of exhaust-related faults, specifically failing twice due to Lambda readings falling outside specified limits, most recently accompanied by an advisory for a minor rear exhaust gas leak. While the car has passed its most recent inspection, the repetition of these emissions failures suggests that the underlying cause, whether related to oxygen sensors, fuel trim, or exhaust manifold integrity, requires close scrutiny to ensure the vehicle remains within legal environmental standards. The mileage profile is consistent with a vehicle of this age, averaging approximately 6,487 miles per year over its ten-year lifespan. This moderate usage pattern suggests the vehicle has not been subject to the heavy wear associated with high-mileage motorway commuting, nor the potential degradation from excessive periods of stationary use. Mechanically, this level of accumulation typically means that while major drivetrain components may still have significant life remaining, consumables such as suspension bushes, brake discs, and tyres will be at a stage where wear is expected and should be monitored. Prospective buyers should pay particular attention to the exhaust system and engine management performance. Given the history of Lambda sensor failures and gas leaks, a test drive should include several cold starts and varying throttle applications to listen for any irregular idling or changes in engine note that might indicate an exhaust leak or incorrect air-fuel mixture. It is also advisable to monitor for any hesitation or loss of power during acceleration, which could be a symptom of the emissions issues flagged in the 2024 and 2026 tests. Tyre condition and alignment also warrant inspection, following advisories in 2025 regarding tyres being worn close to the legal limit and unevenly worn on the edges. This pattern of edge wear can often indicate a need for wheel alignment or issues with suspension geometry. During a test drive, check for any steering pull to one side or vibrations through the steering wheel, and visually inspect the current tread depth and evenness across all four tyres to ensure they meet safety standards and that the previous wear issues have been properly rectified.