Bosch 0445110216 Problems & Replacement Guide

The Bosch 0445110216 is a common-rail diesel injector fitted to BMW 2.0 and 3.0-litre diesel engines (engine codes 204D4 and 306D2). This guide covers the symptoms of a failing unit, the common faults we see on the bench, and what's involved in replacing it correctly.

What it fits

Our remanufactured 0445110216 is calibrated to OEM specification for BMW common-rail diesels running the 204D4 (2.0-litre) and 306D2 (3.0-litre) engines. It also replaces the following Bosch and BMW references:

• 0445110161
• 0986435091
• 7790092
• 13537790093
• 13537793836
• 13537794334

Always confirm the number etched on the injector body matches before ordering. If you're unsure, use our injector finder.

Symptoms of a failing injector

On common-rail engines, a worn or leaking injector typically shows up as:

• Rough or lumpy idle, sometimes with a knock from one cylinder
• Hard starting — particularly when warm — or extended cranking
• Black or grey smoke under load and poor fuel economy
• Loss of power or the engine dropping into limp mode
• Excessive back-leakage causing low rail pressure

Common faults we see

The most frequent failures on high-mileage common-rail injectors are nozzle wear (poor spray pattern and over-delivery), worn internal sealing surfaces causing excessive back-leakage, and sticking from poor-quality or contaminated fuel. Each unit we supply is stripped, fitted with new wear parts and re-calibrated to address these.

Testing before you condemn an injector

Before replacing, confirm the fault with a back-leakage (leak-off) test and live data: compare per-cylinder correction values and rail pressure. A single injector with high back-leakage will pull rail pressure down and upset the others. Our injector testing service can verify a removed unit against OEM tolerances.

Replacement and coding

When fitting, renew the copper washer and seals, torque the clamp and pipe unions to specification, and bleed the system. BMW common-rail systems store per-injector calibration data, so the new injector's calibration values normally need programming to the ECU before road testing.

FAQ

How much is a Bosch 0445110216?

Our professionally remanufactured 0445110216 is £90, supplied ready to fit with no core exchange required and a 12-month warranty included.

Which BMW engines use the 0445110216?

It's fitted to BMW common-rail diesels with the 204D4 (2.0-litre) and 306D2 (3.0-litre) engine codes. Always match the number etched on the injector body to be sure.

Does the 0445110216 need coding?

On BMW common-rail systems the ECU stores per-injector calibration values, so coding the new injector on fitment is recommended.

Summary

The Bosch 0445110216 suits BMW 2.0 and 3.0-litre diesels (204D4 and 306D2). Confirm the part number, verify the fault with a leak-off test, and code the new unit on fitment. View the Bosch 0445110216 product page or browse BMW diesel injectors.