This generation Focus (2018– ) with a diesel manual typically uses small-capacity Euro‑6 diesel engines that return strong motorway economy but can suffer DPF and EGR soot issues if used mainly for short trips. The manual clutch and dual‑mass flywheel on older diesels can be an expensive wear item if the car has high urban mileage; on the plus side, Ford parts and independent garages are common in Ireland so servicing and parts are straightforward to source.

• DPF regeneration history and signs of frequent regenerations or soot smell after cold starts (short-trip use can clog the DPF)
• EGR valve and intake for heavy soot deposits and poor throttle response under load
• Clutch operation and bite point (look for slipping or judder; replacement on diesel manuals can be costly)
• Turbocharger play and boost hose condition (loss of boost, smoke, or whistling under acceleration)
• Lower sills and rear wheel-arch inner lips for corrosion/drain-blocking and rear suspension for knocks