Second Hand BMW 7 Series Catalytic Converter

Catalytic converters are fitted to petrol-engined 7 Series models, while diesel variants use a different emissions system based around a diesel oxidation catalyst and DPF rather than a traditional petrol-style cat. If you have a petrol 7 Series — such as a 730i, 740i, or 750i — you will have one or more catalytic converters in the exhaust system. Diesel owners searching for a 'cat' may actually be looking for a diesel oxidation catalyst or DPF; confirm with your breaker which component you need based on your fuel type and registration.

The E65 and E66 are the same generation of 7 Series — the E65 is the standard wheelbase and the E66 is the long-wheelbase version built from 2001 to 2008. Because the exhaust system follows the engine code rather than the wheelbase, a cat from an E65 with the same engine code may correspond to your E66, but the physical routing differences between the two wheelbases can affect which components interchange. Confirm the exact engine code and wheelbase against your registration with the breaker before ordering, as catalytic converter interchange is strong confirm-with-breaker territory.

These are from different generations entirely: the E65 ran from 2001 to 2008, while the F01 replaced it from 2008 onwards through to 2015, and the engine codes between a 730i and a 750i differ significantly regardless of generation. Catalytic converters are matched to the engine code and emissions era, so a unit from an older generation or a different engine family is very unlikely to be a direct fit and could cause MOT failure. Always provide your exact engine code and registration to the breaker so they can source a cat from the correct generation and engine variant.

Trim level has no bearing on catalytic converter fitment; SE and M Sport 7 Series models share the same exhaust and emissions components when they carry the same engine code. The cat is determined by engine code, fuel type, and the emissions standards applicable to the year of manufacture — not by interior specification or badging. You can disregard trim entirely when searching, but do confirm the engine code from your V5C or registration plate with the breaker.

The F01 generation (2008–2015) spans the Euro 5 era for most of its production run, with Euro 6 becoming the relevant standard for new registrations from September 2015 — after the F01 had been replaced by the G11. A 2013 registration would sit firmly in the Euro 5 period, meaning the catalytic converter should correspond to Euro 5 calibration for your specific engine. This matters because fitting a unit from a different emissions era may not meet MOT requirements or may trigger warning lights; confirm the emissions compliance of any used cat against your registration with the breaker before purchase.

Catalytic converters on larger-engined premium cars like the 7 Series do carry meaningful scrap value, which means quality used examples from breakers can sometimes be harder to source or priced higher than equivalent cats from smaller vehicles. A reputable UK breaker should be able to supply a tested unit, but confirm the mileage, condition, and that the engine code matches yours before agreeing a price. Because interchange specifics for cats are complex, always confirm fitment details against your exact registration with the breaker rather than relying on year or model alone.