Used Peugeot 308 Engine

Both years fall within the 308 Mk1 generation (2007–2013), but 2014 is actually Mk2 territory (2013 onwards), so you are looking across a generation boundary — the engine bays, mounts, and ancillaries changed significantly between those two cars. The engine code is the key detail here: if both cars share the same engine code, there may be scope for a swap, but whether mounts, ancillaries, and ECU wiring cross that boundary cleanly is something you must confirm with the breaker against your registration. Never assume a Mk2 engine drops straight into a Mk1 without checking.

The 308 Mk2 ran from 2013 and received a facelift in 2017, and many engine codes carried across that update, particularly the PureTech petrol and BlueHDi diesel families. However, whether ancillary brackets, engine mounts, or sensor positions changed at the facelift point is something you must confirm with the breaker against your specific registration — don't assume a straight swap just because the engine code matches. Supplying your engine code (found on your V5 or via a VIN check) alongside your reg will let the breaker verify compatibility quickly.

Trim level does not affect engine fitment on the 308; the GT Line, Active, and Allure badges are cosmetic and equipment grades, not mechanical variants. What matters is that the engine code, fuel type, and gearbox type match — a GT Line and an Allure with the same engine code are mechanically the same under the bonnet. Bear in mind a donor car from a different trim may come with different ancillaries or wiring looms attached, so let the breaker know your full spec when getting a quote.

The engine code is the single most useful piece of information you can supply — it is more reliable than year or trim alone because Peugeot used several different engines across overlapping model years. You can find the engine code on your V5C or through a VIN check, and it removes ambiguity around fuel type, displacement, and output variants. Pass it to the breaker alongside your registration plate and they can match the correct unit with confidence.

No — diesel and petrol engines are not interchangeable and a swap between fuel types is a major engineering project, not a like-for-like parts job. When sourcing a used 308 engine, the fuel type must match your existing car exactly. Always confirm the engine code with the breaker to make sure you are being quoted the correct unit for your car.

The gearbox type can affect which engine variant is appropriate, as some 308 engines were paired with specific transmission types and the flywheel, mounts, and sometimes ancillaries may differ between manual and automatic applications. Supply your gearbox type as well as your engine code when contacting a breaker, so they can source a suitable unit. Whether a given donor engine is fully compatible with your transmission setup is worth confirming with the breaker against your registration before purchase.