Bosch 0445110183 Common Rail Injector: Features, Testing & Repair Guide

If you work on small-displacement European diesel engines, the Bosch 0445110183 is a part number you will see over and over. This Bosch common rail injector is fitted on Fiat 1.3 Multijet, Opel 1.3 CDTI and Lancia platforms, and it is one of the most common CR injectors we see on a test bench. In this guide we walk through its technical features, the most common failures our customers report, a real repair case from our service records, and the test bench setup you need to diagnose it correctly.

1. What is the Bosch 0445110183?

The 0445110183 is a solenoid-type common rail injector from Bosch's 0445 11 family. It belongs to the electromagnetic CR generation (CRI2) rather than the later piezo (CRIN) family. It is widely used on the Fiat 1.3 Multijet 16V diesel engine, which was fitted across Fiat, Opel, Lancia, and Suzuki small cars from the mid-2000s onward. Within the Bosch 0445 11 series you will also see close siblings such as 0445110441 and 0445110698 - they share the same solenoid coil, nozzle nut, and overall dimensions, which is why a single set of test parameters usually covers the whole family.

2. Key Technical Features

• Solenoid valve actuation (CRI2 generation), 7-hole nozzle, 250 MPa peak rail pressure

• Standardized Bosch repair interface - same kit covers 0445110183 / 0445110441 / 0445110698

• Plastic fuel rail connection (12 mm), no piezo driver needed

• Common failure mode: coil insulation breakdown after 150,000 km, not the nozzle

• Compatible with most CR test benches from CR919A down to EPS118 (full coverage list at end of article)

3. Common Failures & Repair Cases

The single most frequent service complaint we receive for the 0445110183 is: "I tested four injectors and the machine gives different values on each one - how do I know they are good?" This exact wording is recorded in our after-sales Q&A database (case #208) and is the textbook symptom of one of three root causes:

3.1 Air in the high-pressure circuit

Even a tiny bubble trapped between the injector and the rail connector changes the effective injection volume. Always run at least three test cycles after installing a new injector and discard the first result. If values still drift, vent the high-pressure line at the rail pressure sensor port.

3.2 Leaking return line or loose connector

Check the return oil backflow connector on the injector body. If it is not seated firmly, ambient air is sucked into the return path and contaminates the backflow volume measurement. Tighten to torque spec and re-test.

3.3 Flow sensor calibration drift

This is the most overlooked root cause. After 2-3 years of service, the flow sensor's gain drifts and the displayed value shifts 5-8 % away from reality. The corrective action is to install a known-good new 0445110183, run five test cycles, and re-adjust the sensor parameters to 34000 / 37000 / 38000 so the new injector reads within the OEM tolerance window.

Because the 0445110183 is a CRI2 solenoid injector (not piezo), it is supported by virtually every common rail test b

4. Recommended Test Bench Setupench in the Beacon catalog. The minimum recommended setup is:

• Entry level: EPS118 / EPS205 - covers CRI1, CRI2 and most CRI2-16 solenoid injectors including 0445110183.

• Mid-range: CR819 / CR825 / CR918-S - supports CRI2 plus most HEUI and EUI EUP on the same bench.

• Professional: CR919A - large cam box, full HEUI fixture set, optional piezo upgrade for 0445116018 and CRIN family.

Whichever bench you choose, make sure your Bosch data card includes the 0445110183 reference values (injection volume at 1500 / 2000 / 2500 bar pilot + main, plus the backflow window). If your card is older than 2018, request an updated card from Beacon before testing.

5. Frequently Asked Questions

Q1: Can I test the 0445110183 on the EPS205?
Yes. The EPS205 and EPS206 cover all CRI2 solenoid injectors in the Bosch 0445 11 family including 0445110183. You only need piezo capability (and a different data card) if you are testing 0445116018 or other CRIN piezo injectors.

Q2: The customer wants a test video for the exact 0445110183 unit on their bench - can you send one?
We cannot send a video of the exact same physical unit because the 0445110183 is one of more than 7,000 injector part numbers we support, and we do not stock every variant. What we send instead is the test process video for the CRI2 family plus the reference data card - the procedure is identical, only the values change.

Q3: My values differ between two 0445110183 injectors - which one is bad?
Follow the three-step diagnostic in section 3.1-3.3 above. Most cases are resolved by bleeding air and re-tightening the return line; recalibrating the flow sensor handles the rest. A genuine defective coil or nozzle is the rarest outcome.

About Beacon Machines

Beacon Machines has been manufacturing diesel injector test benches, common rail pumps, and diagnostic equipment for the aftermarket since 2008. Our 90+ machine models cover CR / HEUI / EUI EUP / PT across all major OEM families. Every product ships with a one-year warranty and lifetime remote diagnostics.