Bosch 0445120049 Common Rail Injector For Mitsubishi Fuso 4M50

Bosch 0445120049 is a complete common rail diesel fuel injector assembly engineered for the Mitsubishi Fuso Canter platform equipped with the 4M50-7AT7 4.9L turbo-diesel engine. This unit directly replaces OEM references ME223002 and ME223750, delivering OEM-calibrated solenoid response and atomization characteristics critical for return-to-service reliability in light commercial truck fleets.

The following table outlines the primary technical parameters and cross-reference data for this common rail injector:

This injector is engineered for the Mitsubishi Fuso Canter series, specifically the FE chassis range utilizing the 4M50 engine family, with documented fitment spanning approximately 2005 through 2009 build years. The primary engine variant is the 4M50-7AT7, a 4.9-liter four-cylinder turbocharged diesel producing 110 kW, widely deployed in urban delivery and light-duty distribution roles. It is important to note that the 4M50 engine family utilized more than one injector part number across different production periods and emission configurations; therefore, the engine model alone is insufficient as a fitment confirmation. Always verify against the original injector number or engine serial number prior to ordering.

Proper installation of the 0445120049 requires more than mechanical fitting. Before removal of the original unit, the high-pressure fuel lines and injector bore must be thoroughly cleaned to prevent debris ingress into the new assembly. A critical step post-installation is the entry of the injector calibration code (often referred to as the correction or trim code) into the ECU for the specific cylinder position using a compatible diagnostic platform; failure to code the injector will result in imbalance correction errors and degraded running quality. The fuel system should be flushed or the filter replaced if contamination is suspected, as residual particulate matter remains the leading cause of premature replacement injector failure. Following Mitsubishi Fuso service procedures for tightening torques and leak testing is mandatory.

For diesel repair facilities and parts distributors, the 0445120049 represents a high-turnover application driven by the operational profile of the Canter platform: frequent cold starts, extended idling, and short-haul duty cycles accelerate internal injector wear. Common failure indicators include rough idle at operating temperature, intermittent misfire, visible black smoke, fuel dilution in the engine oil, and hard starting when cold. The common rail system relies on precise solenoid actuation and control valve response to maintain rail pressure consistency across all four cylinders; a single degraded injector can induce system-wide pressure oscillation and cascade symptoms. Carrying this unit as stock supports both direct replacement and preventive maintenance schedules for fleet operators.

Q1: Can I install one 0445120049 injector without replacing all four?
A: Technically yes, provided the remaining three units pass flow and return testing. However, in higher-mileage 4M50 engines, mixed injector condition often leads to cylinder imbalance codes and uneven combustion. We recommend bench-testing all four before partial replacement.

Q2: Does this injector come pre-coded for my specific ECU?
A: No. The calibration code printed on the injector body must be programmed into the ECU after installation using a diagnostic tool capable of Mitsubishi Fuso injector coding. The code is unique to the individual injector, not the part number.

Q3: What distinguishes the 0445120049 from the 0445120048?
A: They are distinct Bosch injector numbers and should not be treated as interchangeable based solely on shared 4M50 engine applications. The 0445120048 relates to different build configurations and emission tiers. Always match the number on the original injector.

Q4: Is this a genuine Bosch new unit or a remanufactured injector?
A: This listing is for a new complete injector assembly, not a remanufactured or repaired unit. No core return is required. It is supplied as a full assembly, not a nozzle or valve kit.

Q5: What fuel system conditions void warranty coverage?
A: Contamination-related failures-water intrusion, metal particulate in the fuel, or debris from a failed high-pressure pump-are not covered. The root cause of the original injector failure must be diagnosed and corrected prior to installation.

Q6: Do you ship internationally for workshop inventory?
A: Yes. We supply diesel repair shops and parts distributors worldwide. Confirm your engine serial number and original injector number before ordering to ensure correct fitment across the 4M50 production range.