0445110598 — Technical Research
Bosch solenoid common-rail injector for the BMW 1.5-litre three-cylinder diesel (engine B37) fitted to the BMW 114d/116d, 214d, X1 and Mini Cooper D. BMW OE 11617520469. Each injector carries an IMA/correction code that must be programmed to the ECU with BMW ISTA on fitment. The B37 is sensitive to fuel filtration; failures are driven by contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
Bosch 0445110598 1.5 d (B37) Common Rail Injector (BMW 1/2 Series, X1 / Mini Cooper D)
Bosch solenoid common-rail injector for the BMW 1.5-litre three-cylinder diesel (engine B37) fitted to the BMW 114d/116d, 214d, X1 and Mini Cooper D. BMW OE 11617520469. Each injector carries an IMA/correction code that must be programmed to the ECU with BMW ISTA on fitment. The B37 is sensitive to fuel filtration; failures are driven by contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the 3-cylinder B37.
Excess back-leakage drops cranking rail pressure.
Out-of-range delivery or rail-pressure deviation cuts power.
Poor atomisation over-fuels the cylinder.
Cylinder-specific injector or fuel-metering codes.
- InstallationProgram the IMA/correction code to the correct cylinder with BMW ISTA before road test.
- InstallationRenew the combustion seal and clamp hardware; torque to spec.
- MisdiagnosisRead live back-leakage data to find the weak cylinder before removal.
- WarningThis is the 1.5 three-cylinder B37 injector - it is not the 2.0 four-cylinder B47 unit; confirm 11617520469 stamped on the old injector.
- TestingBench-test on a Bosch-capable CR tester across delivery and back-leakage points before refit.
What is Bosch injector 0445110598?+
A Bosch solenoid common-rail diesel injector for the BMW 1.5 three-cylinder diesel (engine B37). BMW OE 11617520469.
Which vehicles use 0445110598?+
BMW 114d/116d (F20/F21), 214d (F45/F46), X1 (F48) and Mini Cooper D, roughly 2014-2022.
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector.
Does 0445110598 need coding?+
Yes - program the IMA/correction code to the correct cylinder with BMW ISTA when fitting.
What is the OE part number?+
BMW 11617520469 references Bosch 0445110598.
Does it fit the 2.0d (B47)?+
No - the 2.0 four-cylinder B47 uses a different injector. The 1.5 three-cylinder B37 uses 0445110598; confirm the OE number stamped on your injector.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my B37 run rough?+
A worn or leaking injector unbalances fuelling; read live back-leakage data and bench-test the weak cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 0445110598 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then IMA-coded on fitment.