This generation Passat sits on VW's MQB platform and petrols are usually TSI units (common sizes: 1.4, 1.8 or 2.0). The automatic is often a DSG dual‑clutch box on petrols — confirm whether it’s a DSG or a torque‑converter, because DSGs need periodic fluid/pressurised clutch service. Petrols are smoother and quieter than diesels but typically use more fuel on long motorway runs, so check the exact engine and consumption figures for the advertised car.

• Confirm gearbox type and full service history: if it’s a DSG, ask for DSG fluid/clutch changes and test for jerky or hesitant shifts and mechatronic warning lights.
• Check for oil leaks and signs of above‑normal oil consumption (engine bay, undertray and front subframe); TSI engines can show oil leaks or turbo oil issues.
• Run the engine cold and listen for timing‑chain/tensioner rattle on start‑up (some TSI engines can show chain noise that becomes costly if ignored).
• Inspect ignition coils and spark plug condition (misfires and rough idling are common on higher‑mileage petrol TSIs).
• Thoroughly check suspension bushings, rear spring condition and corrosion under the body and around wheelarches/sills (10 years in Ireland = check for salt‑related rot).