0445117047 — Technical Research
Bosch piezo common-rail injector (Bosch CRI3-20) for the Mercedes-Benz 2.0-litre diesel (engine OM654) fitted to the C/E/A/B-Class, GLA/GLC and Vito 220d. Mercedes OE A6540700187. Each injector carries an IMA/correction code that must be programmed to the ECU with Mercedes XENTRY on fitment. The OM654 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 0445117047 2.0 d (OM654) Piezo Common Rail Injector (Mercedes C/E/A-Class, GLC, Vito 220d)
Bosch piezo common-rail injector (Bosch CRI3-20) for the Mercedes-Benz 2.0-litre diesel (engine OM654) fitted to the C/E/A/B-Class, GLA/GLC and Vito 220d. Mercedes OE A6540700187. Each injector carries an IMA/correction code that must be programmed to the ECU with Mercedes XENTRY on fitment. The OM654 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 OM654.
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 Mercedes XENTRY 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.
- WarningConfirm the OE number A6540700187 stamped on the old injector; the OM654 is a piezo system - do not interchange with OM651 solenoid injectors.
- TestingBench-test on a piezo-capable CR tester across delivery and back-leakage points before refit.
What is Bosch injector 0445117047?+
A Bosch piezo common-rail diesel injector (CRI3-20) for the Mercedes 2.0 diesel (OM654). Mercedes OE A6540700187.
Which vehicles use 0445117047?+
Mercedes C/E/A/B-Class, GLA/GLC and Vito 220d with the 2.0 OM654 engine, from 2016 onward.
Is it solenoid or piezo?+
It is a Bosch piezo common-rail injector (CRI3-20).
Does 0445117047 need coding?+
Yes - program the IMA/correction code to the correct cylinder with Mercedes XENTRY when fitting.
What is the OE part number?+
Mercedes A6540700187 references Bosch 0445117047.
Does it fit the older OM651 2.1?+
No - the OM651 uses a different (solenoid) injector. The OM654 2.0 uses the piezo 0445117047; 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 OM654 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 0445117047 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then IMA-coded on fitment.