Reconditioned Citroën C4 1.2 PureTech Gearbox

Two engine codes, two possible gearboxes: why the 1.2 PureTech C4 requires precise identification before any replacement

On the C4 fitted with the 1.2 PureTech between 2014 and 2024, two engine codes exist side by side: EB2DT and EB2DTS. This detail directly determines the associated gearbox — 5-speed manual or 6-speed manual — and the two are not interchangeable. The 1.2 PureTech unit is also well known for timing chain issues, which can cause juddering or vibrations that are sometimes mistaken for a gearbox fault; a potential engine cause must be ruled out before drawing any conclusions about the transmission.

Characteristic symptoms and failure patterns on these manual gearboxes

Manual gearboxes on the 1.2 PureTech typically make themselves known through difficulty selecting gears, stiff or refused engagement — particularly on the lower ratios. Bearings and synchromesh rings are the most vulnerable components, especially on vehicles used frequently in urban environments where low-speed demands are repeated. A persistent rumbling noise that changes depending on whether the vehicle is in gear or in neutral points to a secondary shaft bearing. When these symptoms worsen, reconditioning the original gearbox or replacing it becomes unavoidable.

Identifying the correct gearbox by engine code and year

Whether the vehicle has a 5-speed manual or a 6-speed manual depends on the engine code stamped on the block, not simply on the engine capacity or quoted power output. Within this range, EDEN BOITES lists five distinct gearboxes covering both families. Checking the engine code remains the only reliable way to avoid a fitment error between gearboxes whose bellhousing, final drive ratio and mountings all differ.