Peugeot 408 Engine Replacement Parts

The Peugeot 408 in the UK is a second-generation model launched in 2023, a completely different platform from the original 408 sold here between roughly 2010 and 2014, so engines from those two generations are not interchangeable. Within each generation, the engine code stamped on your V5 or available via a VIN check is the single most reliable guide to compatibility — two cars badged identically can carry different engines depending on the exact build date. Always supply your engine code to the breaker so they can match it precisely rather than relying on year alone.

Both the 2011 and 2013 cars fall within the first-generation 408 (approximately 2010–2014), so they share the same basic platform, but whether a specific engine transplants cleanly depends on the engine code rather than the model year. Ancillary brackets, mounting positions, and sensor configurations can change at any point in a production run, so confirm with the breaker that the donor engine code matches yours before purchasing. Providing your full engine code from the V5 is the quickest way to get a confident answer.

Both years sit within the second-generation 408 launched in 2023, so the platform is the same and a match is plausible if the engine codes align. However, Stellantis can introduce ancillary or mounting changes mid-production without a formal facelift, so you should confirm with the breaker against your specific registration rather than assuming year-to-year compatibility is guaranteed. Matching engine codes remains the safest starting point.

For engine fitment purposes, trim level makes no practical difference — an Active, Allure, and GT sharing the same engine code are mechanically equivalent under the bonnet. Trim affects interior specification, equipment levels, and some exterior features, none of which influence whether an engine will physically fit or run correctly. Confirm the engine code matches your car and let the breaker worry about trim; you may simply receive a donor engine pulled from a different specification car, which is perfectly normal.

No: petrol and diesel engines are entirely different units and are not interchangeable, even within the same generation of the 408. A diesel swap would require extensive ancillary changes, different engine management, and substantial supporting components, making it impractical as a like-for-like replacement. Always confirm you are quoting for the same fuel type, and supply your engine code to the breaker to ensure an exact match.

ECU pairing and immobiliser compatibility are genuine concerns with modern Peugeot engines, particularly on the second-generation 408 with its Stellantis electronics, but whether coding is needed in your specific case depends on your car's setup and what the donor engine comes with. This is not something we can state as a blanket rule, so raise it directly with the breaker against your registration — a good breaker will tell you whether the engine they have is likely to need coding and can sometimes advise on what a specialist will charge.