0445110263 — Technical Research
Bosch solenoid common-rail injector for the Mercedes OM646 2.1 CDI (OM646.982/983) fitted to the Vito and Viano (W639), and also seen on related OM646 vans. Mercedes OE A6460700487; related Bosch family number 0445110179. Each injector must be coded to its cylinder position with Mercedes Xentry after fitting. Failures are driven by poor fuel filtration, 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 0445110263 2.1 CDI (OM646) Common Rail Injector (Mercedes Vito / Viano W639)
Bosch solenoid common-rail injector for the Mercedes OM646 2.1 CDI (OM646.982/983) fitted to the Vito and Viano (W639), and also seen on related OM646 vans. Mercedes OE A6460700487; related Bosch family number 0445110179. Each injector must be coded to its cylinder position with Mercedes Xentry after fitting. Failures are driven by poor fuel filtration, 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 2.1 CDI.
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.
- InstallationCode the injector correction value to the correct cylinder with Mercedes Xentry before road test.
- InstallationRenew the combustion seal and heat-shield/clamp hardware; torque to spec.
- MisdiagnosisRead live back-leakage data to find the weak cylinder before removal.
- WarningFix contamination (filter/water/debris) first; the OM646 is sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Bosch injector 0445110263?+
A Bosch solenoid common-rail diesel injector for the Mercedes OM646 2.1 CDI engine. Mercedes OE A6460700487.
Which vehicles use 0445110263?+
Mercedes Vito and Viano (W639) 2.1 CDI (OM646.982/983), and related OM646 vans.
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector.
Does 0445110263 need coding?+
Yes - each injector must be coded to its cylinder position with Mercedes Xentry after fitting.
What is the OE part number?+
Mercedes A6460700487 references Bosch 0445110263.
How is 0445110263 different from 0445110179?+
0445110179 is a related Bosch number in the same Mercedes OM646 family; always match the OE number stamped on your injector before ordering.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my Vito or Viano 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 0445110263 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then coded on fitment.