2012 Audi A5 2.0L Diesel · VE12 ABF

The defining mechanical story for this 2012 Audi A5 is one of episodic but genuine failure risk, with a single dangerous tyre defect and a handful of major mechanical items flagged within a relatively short testing window. The most recent examination on 2025-10-07 returned a clean pass with no advisories, which superficially looks reassuring, but this must be viewed against the broader pattern: a failure just three days before the 2024 pass that included emissions testing being aborted, a rough offside front wheel bearing, an insecure rear exhaust, and both rear inner tyres being worn close to the legal limit. A further failure on 2023-10-30 recorded a dangerous nearside rear tyre bulge due to structural separation alongside a lower suspension arm bush that had progressed from advisory to major wear in the space of a single test. The alternation between clean passes and failures carrying major and dangerous defects suggests that components on this chassis are being addressed reactively rather than holding up consistently between annual tests. Mileage accumulation is broadly typical for the vehicle's age at 140,644 recorded miles over fourteen years, averaging just over 10,000 miles annually. There are no extended gaps in the testing record that would indicate long periods off the road, and the mileage progression between annual tests appears steady rather than displaying any sudden jumps or anomalies. For a vehicle of this age and accumulated mileage, the mechanical implication is that consumable items such as suspension linkages, wheel bearings, exhaust mounting hardware, and tyre inner edges will be approaching the end of their natural service life, particularly on a car of this weight and chassis specification. The fact that the inner shoulder wear on the rear tyres was flagged twice in quick succession is also worth noting, as this often points to suspension geometry rather than purely inflation or alignment issues. Given the specific history, the most important components to scrutinise on a physical inspection are the front suspension arms and their inner bushes, particularly the rear arm inner bush that was recorded as both advisory and major on the offside front within twelve months. On a test drive, listen for clonking or knocking over uneven surfaces, particularly at low speed over speed humps, and feel for vagueness or a slight judder through the steering wheel that could indicate worn bushes allowing movement beyond manufacturer tolerance. The offside front wheel bearing previously recorded as rough when rotated should be rechecked by jacking the corner and spinning the wheel by hand to feel for grittiness or notchiness, and any humming that changes pitch with cornering would confirm renewed wear. The rear exhaust mounting failure from the 2024 test points to corroded or snapped hangers and rubber doughnuts, common on a car of this age exposed to road salt and winter moisture, so the system should be inspected with the vehicle on a ramp for any signs of sagging, rattles, or heat shield contact. The tyre separation history on the nearside rear is particularly relevant, as structural bulges can occur without warning and the inner edge wear pattern on both rear tyres warrants a careful check of wheel alignment and a thorough inspection of the sidewalls and inner shoulders for any remaining bulges or cracking. Finally, the incomplete emissions test on the 2024 failure should prompt a current check for any stored diagnostic trouble codes, visible smoke on start-up, or rough idle, as emissions-related majors on a petrol Audi of this era frequently trace back to ageing sensors, ignition components, or catalyst efficiency rather than a single replaceable part.