Used Mercedes-Benz Citan Fuel Injection Pump

The engine code is the single most important detail for matching a fuel injection pump — it matters far more than the year or badge on the van. You'll find it on your V5C logbook or by running a VIN check, and it will typically be something like OM607 or OM651 depending on the variant. Always quote this code to your breaker when requesting a quote, as two Citans from the same year can have different engines and completely incompatible pumps.

The first-generation Citan ran from 2012 to 2021, so both years sit within the same generation, but that alone does not confirm the pump will interchange. What actually determines compatibility is whether both vans share the same engine code — if they do, there is a strong chance of a match, but ancillary and mounting changes can occur mid-production without a formal model update. Confirm the engine codes on both vehicles and then check directly with your breaker against your registration before buying.

No, trim level does not affect fuel injection pump fitment — the pump follows the engine, not the badge or body configuration. Whether your Citan is a Van, Tourer, or Mixto, if the engine code matches the donor vehicle, the mechanical compatibility is the same. You may find cosmetic differences between stripped-out Van models and passenger-focused Tourer versions, but these are irrelevant to the pump itself.

No — diesel and petrol fuel injection systems are fundamentally different, and the pumps are not interchangeable under any circumstances. The Citan was offered with both diesel and petrol engines in the UK, so always confirm the fuel type as well as the engine code when sourcing a used pump. A breaker will need both pieces of information to supply the correct unit.

This is an important question, but one we cannot answer with a blanket rule — ECU pairing and immobiliser coding requirements vary and must be confirmed with your breaker against your specific registration. Some pumps on modern Mercedes engines require coding to the vehicle after fitment, which can affect cost and complexity. Ask your breaker upfront whether the pump they supply has been coded before, and factor in any additional programming work when comparing quotes.

The second-generation Citan (W420) launched in 2022 with a revised platform and updated engines, making it a distinct generation from the original W415 model that ran from 2012 to 2021. Because of this generational boundary, crossing a pump from one generation to the other is unlikely to be straightforward even if the engine code appears similar on paper. We would route this firmly to your breaker to verify against both registrations before purchasing.