This is the third-generation A3 (8V) era — many cars of this year use TFSI petrol engines paired to a 6- or 7-speed S tronic dual-clutch automatic. The S tronic needs periodic fluid/mechatronics attention and can be costly to repair if neglected; smaller TFSI engines (1.0/1.2/1.4/1.5) are common and the 1.5 introduced cylinder-deactivation features that like regular oil changes. Parts are widely available in Ireland, but dealer labour and diagnostics for gearbox/electronics run above mainstream levels.

• Drive test for S tronic behaviour: no harsh shifts, hesitation, shudder from cold or delayed engagement — listen for clutch/mechatronics noise.
• Cold-start engine noise: listen for timing-chain/tensioner rattle in the first 10–20 seconds (reported on some TFSI units).
• Check engine oil level and look under the plastic cover for oil leaks around turbo/oil-separator areas (symptom of higher oil consumption).
• Check rear suspension and anti-roll link condition — knock or uneven tyre wear can indicate worn mounts or alignment issues.
• Verify parking sensors, rear camera and MMI functions work correctly (electronically-controlled features can be expensive to fix).