0445110574 — Technical Research
Bosch 0445110574 (Bosch 0445110573, exchange 0986435286, OE A6510703187) CRI2 common-rail injector for the Mercedes-Benz 2.1 CDI OM651 — the Bosch-supplier variant. The OM651 was factory-fitted with two injector suppliers; the Delphi-supplied OM651 injector is a separate authority (28342997). Not interchangeable — confirm the Bosch OE A6510703187 marking. Remanufactured, calibrated, 12-month warranty. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Nozzle coking / poor spray pattern; Water-in-fuel corrosion.
Bosch 0445110574 2.1 CDI Common Rail Injector (Mercedes C/E-Class, Sprinter, Vito OM651 — Bosch supplier)
Bosch 0445110574 (Bosch 0445110573, exchange 0986435286, OE A6510703187) CRI2 common-rail injector for the Mercedes-Benz 2.1 CDI OM651 — the Bosch-supplier variant. The OM651 was factory-fitted with two injector suppliers; the Delphi-supplied OM651 injector is a separate authority (28342997). Not interchangeable — confirm the Bosch OE A6510703187 marking. Remanufactured, calibrated, 12-month warranty. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Nozzle coking / poor spray pattern; Water-in-fuel corrosion.
A leaking or out-of-calibration injector unbalances cylinder fuelling, felt as a shake at idle.
Excess back-leakage bleeds rail/line pressure during cranking, causing long or failed starts.
Out-of-range delivery or pressure deviation triggers a torque cut and limp home.
Poor atomisation or a dribbling nozzle over-fuels the cylinder.
Cylinder-specific injector, balance or fuel-metering fault codes are logged.
- InstallationCode each injector's calibration code to the correct cylinder with Mercedes Xentry on fitment before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp/nut to manufacturer spec.
- MisdiagnosisRead live back-leakage and per-cylinder contribution data to confirm the weak cylinder before removal.
- TestingBench-test across delivery and back-leakage points and verify spray pattern before refit.
- WarningConfirm fitment by OE number and engine code before ordering; injector sub-variants are not always interchangeable.
What is injector 0445110574?+
0445110574 is a Bosch common rail solenoid injector (cri2) diesel injector for the Mercedes-Benz 2.1 CDI (OM651, Bosch supplier). It is supplied remanufactured, bench-tested and calibrated to OEM specification.
Which vehicles use 0445110574?+
It is fitted to the Mercedes-Benz 2.1 CDI (OM651, Bosch supplier) — including Mercedes-Benz C-Class (W204) 200/220 CDI (OM651, Bosch); Mercedes-Benz E-Class (W212) 200/220 CDI (OM651, Bosch); Mercedes-Benz GLK (X204) 200/220 CDI (OM651, Bosch); Mercedes-Benz Sprinter (906) 210/213/313/316 CDI (OM651, Bosch). Confirm fitment by OE number and engine code.
What type of injector is 0445110574?+
It is a Bosch Common Rail Solenoid Injector (CRI2). Always confirm the OEM markings on the injector body before fitting.
Does 0445110574 need coding when fitted?+
Yes — each OM651 injector has a calibration code that must be programmed to the correct cylinder with Mercedes Xentry on fitment.
What are the symptoms of a failing 0445110574?+
Common signs are rough idle and vibration, hard starting, power loss or limp mode, black smoke and an engine-management light.
What causes these injectors to fail?+
Most failures come from poor fuel filtration, contamination and water in the fuel leading to wear, high back-leakage and nozzle coking. Fix the cause before fitting replacements.
Is a remanufactured 0445110574 as good as new?+
A properly remanufactured injector is stripped, fitted with new wear parts, reassembled and recalibrated on a common-rail test bench to OEM tolerances, then supplied with a warranty.
Should I replace one injector or the full set?+
Replace the confirmed faulty injector first. On high-mileage engines fitting a matched set reduces the chance of a repeat fault, but it is not mandatory if the others test within spec.
Do you bench-test the injector before dispatch?+
Yes. Every unit is tested for delivery, back-leakage and spray pattern on a calibrated common-rail tester before it leaves us.
Is delivery and warranty included?+
Yes — the price includes free UK delivery and a 12-month warranty.
Is the Mercedes OM651 a Bosch or Delphi injector?+
The OM651 2.1 CDI was factory-fitted with both. This 0445110574 is the Bosch-supplier injector (OE A6510703187); the Delphi-supplier injector is a separate part (e.g. A6510704987). They are not interchangeable — confirm the OEM marking before ordering.
Does the Mercedes OM651 injector need coding?+
Yes — each OM651 injector carries a calibration code that must be programmed to the correct cylinder with Mercedes Xentry on fitment.