0445120258 Original Fuel Injector – Doosan OE 400903-0031

0445120258, also written as 0 445 120 258, is the original common rail injector for selected Doosan DL08 / DL08K diesel engine applications. The corresponding Doosan OE number is 400903-0031 (search format 4009030031).

As an original-specification unit, this injector is supplied where the correct OE cross reference matters. Bo-sch officially lists 0445120258 as an Injector, CR System, and the unit is associated with the DX300LC-3 excavator application.

OE Cross Reference

Injector Repair Parts

The parts catalogue lists 0433172214 as the hole-type nozzle and F00RJ02429 as the valve set for injector 0 445 120 258.

Why Confirm by OE Number

Different versions of the Doosan DL08 engine may use different injection components, and some catalogues also list DX350-series references. Always confirm by the original injector number or Doosan OE number rather than by machine model alone.

Typical Application

Confirmed and reference applications are listed separately; not all DX350 units use this injector.

Order Confirmation

Before ordering, please provide one of the following:

1. Injector number: 0445120258 / 0 445 120 258
2. Doosan OE number: 400903-0031
3. Injector photo
4. Engine model and serial number
5. Excavator model and production information

Different versions of the DL08 engine may use different fuel injection components; confirmation by the injector number is recommended.

Doosan DL08 Fuel System Note

Doosan DL08 spans several emission versions and more than one common rail fuel system. This page locks only the reliably confirmed relationship: 0445120258 / 0 445 120 258 / 400903-0031 → Doosan DL08 / DL08K → common rail injector. Other DL08 injectors, high-pressure pumps and common rail components are treated as related DL08 products only; they are not mandatory matched parts for 0445120258. Always confirm by the number stamped on the existing injector, the engine and the machine information.

Related Products

0445020157 CP3S3 high pressure fuel pump – compatible fuel-system reference for selected Doosan DL08K common rail applications. This is a related reference only and is not a mandatory matched part for 0445120258.