Bosch 0445110558 Common Rail Injector – Deutz TCD3.6 L4 Replacement

Bosch 0445110558 is a solenoid-type common rail injector engineered for Deutz KHD TCD3.6 L4 diesel engines, serving as a direct replacement for OEM 04123831. This CRI2-16 series injector delivers precise fuel atomization under high rail pressure, restoring combustion efficiency and emissions compliance in agricultural machinery, construction equipment, and industrial power units. Each unit arrives fully assembled with a copper sealing washer and is factory-tested for leak-down and spray pattern integrity.

The 0445110558 fits a wider equipment footprint than the engine designation alone suggests. In Deutz-Fahr tractors, it serves Agrotron 410, 420, 430, and 440 models, plus the Agroplus and Agrofarm series. Same Explorer and Lamborghini Spire tractors share the same injector body. For construction and road maintenance fleets, Hamm H7i and H10i single drum rollers rely on this injector for consistent torque under variable load. JLG lift equipment also lists the 0445110558 via the 4123831AM cross-reference. Because these machines often operate in dust-heavy or high-vibration environments, the injector's internal tolerances face constant stress, making genuine Bosch quality essential for fleet uptime.

Before removal, confirm the replacement OEM number matches the original unit-misidentification between 0445110558 and visually similar CRI2 injectors leads to driveability complaints. Always replace the copper combustion seal and clean the injector bore to remove carbon deposits that can skew nozzle protrusion. Apply the specified tightening torque in stages, and code the injector into the ECU if the engine management system requires IMA or trim data entry. Never reuse a leak-off connector that shows fuel weeping at the return nipple. After installation, run a leak-off test and verify rail pressure stability at idle and under load before releasing the machine to the customer.

In a common rail system, the injector is the final actuator translating rail pressure into combustion. The 0445110558 uses a solenoid valve to control needle lift, enabling multiple pilot and post-injection events per cycle. When wear develops internally, symptoms include rough idle, white smoke, fuel dilution, and increased fuel consumption. For diesel repair shops, stocking this injector reduces vehicle downtime for Deutz-powered equipment operators who cannot afford hydraulic or agricultural downtime. For distributors, the broad cross-reference compatibility creates demand across tractor, roller, and industrial engine segments. High return flow is the most common failure indicator-bench testing before and after replacement confirms the repair's success. Keeping this injector on the shelf also shortens diagnosis time, since technicians can swap a known-good unit to isolate faults before committing to a full set replacement.

Q1: How can I verify the 0445110558 is correct before installation?
A: Compare the Bosch number stamped on the injector body against the original. The OEM 04123831 is the most reliable identifier; engine code alone is insufficient.

Q2: Does the injector arrive with installation hardware?
A: Most suppliers include a new copper washer and protective cap. Bolts and return line seals may be sold separately-confirm with your vendor.

Q3: What causes repeat injector failures in TCD3.6 engines?
A: Fuel contamination and water ingress through the filter are primary causes. Inspect the fuel rail and tank for debris before fitting new units.

Q4: Can I mix this injector with other CRI2 variants?
A: No. Flow class and solenoid response differ across CRI2-16 variants. Installing mismatched injectors causes cylinder imbalance and potential DTCs.

Q5: What is the typical service interval for these injectors?
A: Bosch does not publish a fixed interval. Leak-off testing every 1,000 hours and replacement upon return flow exceeding specification is the practical rule.