BOSCH 0445110520 Common Rail Injector – 2.3 Multijet Diesel

This BOSCH 0445110520 common rail injector is a genuine solenoid-type diesel fuel injector designed for the Fiat Ducato, Citroën Jumper, Peugeot Boxer, and Iveco Daily platforms equipped with the 2.3-liter F1A/F1C Multijet engine family. Operating within a rail pressure regime typically exceeding 1,600 bar, this injector delivers the precise pilot, main, and post-injection events required for Euro 4 and Euro 5 emission compliance. Each unit carries the Bosch calibration code necessary for ECU programming after installation, a step that directly impacts combustion balance and injector lifespan.

The 0445110520 is a solenoid-actuated injector built to Bosch's original equipment tolerances, with a 2.3L diesel application focus that demands consistent return flow characteristics and stable spray pattern geometry across the duty cycle. | Parameter | Specification | |-----------|---------------| | Part Number | 0445110520 (0 445 110 520) | | Injector Type | Solenoid, Common Rail | | Engine Displacement | 2,287 cc | | Fuel System Pressure | Up to 1,800 bar (system-dependent) | | OEM Cross-References | 5801594342, 5801483286 (Iveco / Case New Holland) | | Calibration Code | Required for ECU programming | | Seal Components | Copper gasket and O-rings included | This injector is supplied with new copper washers and O-rings, both of which are single-use items that must be replaced at every removal to prevent compression leakage and combustion gas blow-by.

The BOSCH 0445110520 serves the Fiat Ducato (250 platform, 2006 onward), Citroën Jumper, and Peugeot Boxer vans across the 110 Multijet, 130 Multijet, 150 Multijet, and 180 Multijet variants, covering power outputs from 82 kW to 130 kW. The Iveco Daily 2.3L also shares this injector in multiple model years, including the 35 S 13 and 30 S 13 configurations. The engine codes F1AE3481G, F1AE3481D, F1AE3481E, F1AGL411D, F1AGL411A, and F1AGL411C appear repeatedly across these applications, confirming the injector's role as a high-volume OE replacement for the Stellantis and Iveco commercial vehicle fleet.

Fitting the 0445110520 demands clean-bench discipline: the injector bore must be free of carbon deposits and the copper gasket seat must be flat, or combustion gases will erode the sealing surface and cause compression leakage. The high-pressure pipe should be tightened to 27 ± 2 N·m, and the pressure plate bolts to 20 N·m + 90° following the OEM sequence. The most critical step is programming the injector's calibration code into the ECU via a diagnostic scanner; omitting this step results in rough running, cylinder imbalance, and elevated emissions even if the mechanical installation is perfect. Any contamination introduced during installation, whether from a dirty fuel line or an improperly seated micro filter, can alter return flow and trigger a premature injector fault.

For diesel repair shops, the 0445110520 represents a high-turnover wear item on some of Europe's most common commercial vans. These injectors typically degrade through nozzle erosion, internal seat wear, or solenoid coil failure, producing symptoms such as hazy idle, black smoke under load, or fuel dilution in the engine oil. When return flow testing reveals one injector exceeding its peers by more than 50%, replacement is the economically rational choice over reconditioning, particularly when internal precision surfaces show scoring or the piezo stack is not the failure mode (solenoid units being more rebuild-friendly than piezo). Stocking this number as part of a matched set approach reduces comebacks and supports fleet maintenance schedules where downtime is measured in lost revenue.

Q1: Can I install a single 0445110520 without coding it?
No. The calibration code must be written to the ECU. Un-coded injectors cause imbalance, smoke, and potential piston damage.

Q2: Is the 0445110520 compatible with both 110 and 180 Multijet engines?
Yes, it covers the F1A/F1C 2.3L range, but confirm the engine code and OEM cross-reference before ordering.

Q3: What causes early failure in these injectors?
Fuel contamination and water ingress are the primary killers. The micro filter and copper gasket replacement at installation is not optional.

Q4: Do I need to replace all four injectors at once?
On high-mileage vans, replacing as a matched set prevents repeat labor and restores fuel balance across all cylinders.

Q5: Does the 0445110520 come with installation hardware?
New copper gaskets and O-rings are included. The pressure plate bolts are typically reused if within spec.

Q6: How can I verify the injector before installing it?
Request a return flow test report or bench test data if available. A leak-off comparison against known-good units confirms health.