Cheap Peugeot 408 Gearbox

The Peugeot 408 is a single-generation model that ran from 2022 onwards in its current form for the UK and European market, so gearbox compatibility is primarily tied to the engine code rather than the model year alone. The engine code stamped on your V5 or revealed by a VIN check is the most reliable starting point when asking a breaker to match a unit. Always confirm the specific gearbox ratio and mounting configuration with your breaker against your registration before purchasing.

Within the same generation of the 408, gearboxes from closely neighbouring years are often interchangeable provided the engine codes match exactly, but Peugeot can introduce ancillary or mounting changes during a production run without altering the year badge. Give your breaker both registration numbers and let them cross-reference the exact engine codes to confirm compatibility before you commit.

The 408 shares platform and powertrain architecture with other Stellantis models including the 308 and 3008, so some gearbox units may be mechanically identical where the engine codes match. However, bell-housing interfaces, mounting points, and wiring harness connections can differ between models even with the same base unit, so this is not a straightforward swap to assume. Confirm compatibility with your breaker by supplying the engine code and registration for both vehicles before buying.

Trim level alone does not determine gearbox fitment on the Peugeot 408; what matters is the engine code, fuel type, and whether the car is specified with the automatic or manual transmission. A GT and an Allure running the same engine code and gearbox type will use the same unit, though there may be cosmetic or software differences to be aware of. Focus on matching the engine code and transmission type rather than the trim badge when sourcing a replacement.

Yes, petrol and diesel gearboxes are not interchangeable even if the external housings look similar, because the internals, ratios, and mountings are engineered around the specific engine's torque characteristics. Always confirm that the fuel type of the donor vehicle matches your own, and cross-reference engine codes with your breaker to make sure the unit is the correct variant.

Whether your replacement gearbox requires any ECU pairing or immobiliser coding depends on the specific transmission control unit fitted and how your car's electronics are configured, and this can vary. This is something you should confirm directly with your breaker and the garage carrying out the installation, as we cannot state this as fact for every combination.