Peugeot 306 Catalytic Converter Replacement Parts

Yes, petrol-engined Peugeot 306s were fitted with a catalytic converter as standard, in line with emissions regulations introduced during the 1990s. Diesel 306s used a different exhaust after-treatment approach and do not have a traditional catalytic converter. If you have a diesel 306, confirm with your breaker exactly what exhaust components your vehicle requires.

The Peugeot 306 ran from 1993 to 2002, with a significant facelift in 1997 that updated the bodywork and brought some engine changes. The cat is matched to the engine code and emissions specification of the car, not the body style, so the key question is whether the engine code is the same across the two cars. Because catalytic converter interchange across model-year boundaries is strong confirm-with-breaker territory, always check the exact engine code against your registration with the breaker before buying.

No, trim level does not affect catalytic converter fitment on the 306 — trims such as L, LX, XR, XS, XT, GTi-6 and Cabriolet all used the same cat as others sharing the same engine code and fuel type. The engine code is what determines the correct part, not whether the car is a base-spec or a higher trim. One thing to be aware of is that a used cat from a donor car may show different surface finish or heat shielding, but this has no bearing on whether it will fit or function correctly.

No — diesel 306s do not use a catalytic converter in the same way as petrol models, so a petrol cat cannot simply be swapped across. The exhaust systems are fundamentally different between fuel types. Make sure you specify your fuel type clearly to the breaker so they quote you the correct component for your vehicle.

Yes, the GTi-6 uses the XU10J4RS engine which is different from the engines fitted to mainstream petrol 306 variants, so it will require a cat that corresponds to that specific engine code. You should not assume a cat from a standard 1.6 or 1.8 306 will interchange with a GTi-6 unit. Always quote your exact engine code and registration to the breaker, as GTi-6 cats can be harder to source and confirming the match is particularly important.

The key factors are that the cat must match your engine code and was manufactured to the same or equivalent emissions standard as the original fitment, since fitting a cat from the wrong specification can cause an MOT failure on emissions even if it physically bolts on. A used cat should also be free from cracks, rattling internals or physical damage before fitting. Confirm the engine code and emissions compatibility directly with the breaker against your vehicle's registration before purchasing.