Peugeot 407 ECU Replacement Parts

The 407 ran from 2004 to 2011 with a facelift in 2008, and that facelift can bring ancillary changes that affect whether an ECU will swap directly across that boundary, so you should confirm compatibility against your registration with the breaker before buying. What matters most is that both cars share the same engine code, fuel type, and gearbox type — if those match, there is a much better chance of compatibility, but it is not guaranteed. Always give the breaker your engine code from your V5 or a VIN check rather than relying on year alone.

No — petrol and diesel ECUs are completely different units and are not interchangeable under any circumstances. The ECU is programmed specifically for the engine management of that fuel type, so you must match fuel type exactly. Make sure you also supply your engine code to the breaker, as there are multiple petrol and diesel variants of the 407 and the engine code narrows it down far more precisely than fuel type alone.

Trim level does not affect ECU fitment on the 407 — SE, SX, Executive, and GT are badge and equipment differences, not mechanical ones. What determines compatibility is the engine code, fuel type, and gearbox type, so a unit from any trim will work provided those details match your car. You may find the donor car's interior spec or colour differs from yours, but that has no bearing on whether the ECU is the right one.

Yes, automatic and manual gearbox variants can require different ECUs because the engine management system interacts with the transmission, so you need to match gearbox type as well as engine code and fuel type. Always tell the breaker whether your 407 has a manual or automatic gearbox when requesting a quote. Giving them your full engine code alongside this information gives them the best chance of sourcing the correct unit.

ECU pairing and immobiliser coding is something you need to confirm with the breaker and your fitting garage rather than something we can state as fact here, as practice can vary depending on the specific unit and how it was previously paired. Many used ECUs do require coding to the recipient vehicle's immobiliser before the car will start, so budget for that possibility when getting quotes. Ask the breaker directly whether the unit they are supplying has been tested and what coding work they recommend.

The engine code matters far more than the engine size description, because '2.0 HDi' covers more than one variant of that engine used in the 407, and different variants have different ECUs that are not interchangeable. You will find the engine code on your V5 registration document or via a VIN check, and it is the single most useful detail you can give a breaker when requesting a quote. Relying on '2.0 HDi' alone risks being quoted a unit that does not match your car.