OEM Cummins Doser Injector 4377650 / 5506855

OEM CUMMINS DEF DOSER / INJECTOR 4377650 / 4354281 / 5578983 (kit) (A050S599) ALSO WORKS FOR 5506855

Per Cummins TSB 240215, the 5506855 doser injector is a direct replacement for the no longer available 4377650. The manifold is different, but there are no changes required. You may receive and updated version of this part, rest assured it is a direct replacement. We also offer various aftermarket gaskets for injectors, you can view these here.

This is not an aftermarket part, it is OEM.

These units are OEM "take-offs", they are brand new and unused but do not come in Cummins retail packaging. We buy complete emissions systems from Cummins and then break them down so that we can sell the pieces individually. Due to this, there may be paint marks or minor cosmetic blemishes, but the products will function without issue.