Compatible for Ford C-MAX II, FOCUS III, Galaxy II, MONDEO IV, S-MAX 2.0 TDCi, 2.2 TDCi A DPF injector is a type of fuel injector that is used in diesel vehicles equipped with a particulate filter (DPF). The DPF injector is responsible for injecting a regeneration additive into the DPF, which helps burn soot particles trapped in the filter. The regeneration additive is usually composed of urea or ammonia, and it is injected into the DPF when the engine reaches a high temperature. The regeneration additive reacts with the soot particles to form harmless gases which are then exhausted through the exhaust system. Ford : 1 682 360, 1 693 654, 1 708 267, 1 856 982, 1682360, 1693654, 1708267, 1856982, AV61-9T540-BC, AV61-9T540-BD, AV61-9T540-BE, AV61-9T540-BF, AV619T540BC, AV619T540BD, AV619T540.