Ford Focus Catalytic Converter Replacement Parts

The Mk1.5 (facelift) Focus ran from 2004 to 2007, so a 2006 and 2005 car sit within the same generation, which is a good starting point for compatibility. However, the exact fit depends heavily on the engine code — a 1.6 petrol unit and a 2.0 petrol unit will not share the same catalytic converter, and even within the same displacement there can be variations. Always confirm the engine code from your V5C and check it against the donor vehicle with the breaker before buying.

The Mk2 and Mk3 Focus are distinct generations with different exhaust architectures, and a catalytic converter from one is very unlikely to fit the other directly. The Mk3 also introduced stricter emissions standards over its production run, including the Euro 5 to Euro 6 boundary around 2015, meaning a Mk2 cat could also cause an MOT emissions failure even if it could be physically fitted. Name the generation boundary clearly to the breaker and ask them to match by engine code and emissions standard, not just model year.

Trim level — whether that's Studio, Zetec, Titanium, or ST-Line — makes no difference to which catalytic converter a Focus requires. The cat is determined entirely by the engine code, fuel type, and the emissions legislation the car was built to comply with. When searching with a breaker, the trim name on your V5C is not relevant information; your engine code and registration are what matter.

Yes, the 1.0 EcoBoost petrol engine does have a catalytic converter — all petrol Focuses do, as the cat is essential for controlling hydrocarbon and CO emissions on petrol engines. However, the 1.0 EcoBoost went through several calibration and hardware updates across its production life, and not every EcoBoost cat will necessarily interchange, particularly across the Euro 5 to Euro 6 boundary. Give the breaker your full engine code and registration so they can confirm the correct unit rather than assuming all EcoBoost cats are the same.

Diesel Focuses have both — a diesel oxidation catalyst (DOC) and, on later models, a diesel particulate filter (DPF) as well. The two components serve different purposes and are separate parts, though they are sometimes housed close together or in a combined unit depending on the year and engine. Whether a used diesel cat or DPF from another Focus will interchange with yours is genuinely complex territory, so confirm the specifics with the breaker using your registration and engine code rather than relying on year or trim alone.

The Mk3 Focus facelift arrived in 2014, and that period sits around the transition from Euro 5 to Euro 6 compliance, meaning two 2014 cars could potentially be built to different emissions standards depending on when in the year they were registered and which engine they have. Using a catalytic converter from the wrong emissions era could result in an MOT failure even if it physically bolts on. Check your V5C registration against the breaker's donor vehicle carefully, and ask them to confirm the emissions standard of their part matches yours — this is not something to assume.