Used Mercedes-Benz C-Class Catalytic Converter

The W204 ran from 2007 to 2014 and the W205 from 2014 onwards, and these are distinct generations with different exhaust architectures, so a catalytic converter from a W204 is very unlikely to be a direct fit on a W205. Even where engine codes appear similar across the boundary, the emissions calibration and physical mounting can differ. Always confirm the exact part against your registration with the breaker before ordering.

The W204 was facelifted in 2011, and while the two phases share the same basic platform, exhaust and emissions components can differ between pre- and post-facelift builds depending on the engine code and the Euro emissions standard the car was built to meet. Whether the catalytic converter from a pre-2011 W204 will interchange with a post-2011 car is strong confirm-with-breaker territory — give your registration and engine code to the breaker and let them verify the match.

Trim level — whether SE, Sport, AMG Line, or Avantgarde — does not affect catalytic converter fitment; what matters is the engine code, fuel type (petrol or diesel), and the emissions standard the vehicle was built to. A cat from a Sport-trimmed car with the same engine code and emissions era as your AMG Line should be the same part, though used cats may carry surface differences from their previous vehicle. Confirm the engine code match with the breaker to be sure.

Diesel C-Class models typically have both a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF) as separate components in the exhaust system, so the catalytic converter does exist on diesel variants. The exact configuration depends on the engine code and the emissions era — Euro 5 and Euro 6 cars can differ in layout. Whether a specific diesel cat from one car will interchange with yours is something you should confirm with the breaker against your registration and engine code.

In most cases the catalytic converter sits close to the engine in the front section of the exhaust, and that section is typically shared between the saloon and estate on the same engine code — but the rear sections of the exhaust system do differ between body styles. Confirm with the breaker that the part number matches your body style and engine code before purchasing, as small differences in the front pipe routing can sometimes exist.

AMG variants like the C63 and C43 use different engines to the standard C-Class range — the C63 historically used a 6.2-litre naturally aspirated V8 or later a 4.0-litre twin-turbo V8, and the C43 a 3.0-litre twin-turbo V6 — so their catalytic converters are not interchangeable with standard four-cylinder or six-cylinder non-AMG models. Each AMG variant has its own exhaust configuration tied to its specific engine, and whether any two AMG cats interchange is best confirmed with the breaker using your exact engine code and registration.