0445110327 — Technical Research
Bosch solenoid common-rail injector for the GM 2.0 CDTi (A20DT/A20DTH/A20DTJ) engine in the Vauxhall/Opel Insignia, Astra J, Zafira C and Cascada. Bosch exchange 0986435201; GM OE 55566050/55496735. Replacements are coded to the ECU with the injector correction value. Failures are driven by poor fuel filtration, contamination and back-leakage. 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 0445110327 2.0 CDTi (A20DT) Common Rail Injector (Vauxhall/Opel/Saab/Chevrolet)
Bosch solenoid common-rail injector for the GM 2.0 CDTi (A20DT/A20DTH/A20DTJ) engine in the Vauxhall/Opel Insignia, Astra J, Zafira C and Cascada. Bosch exchange 0986435201; GM OE 55566050/55496735. Replacements are coded to the ECU with the injector correction value. Failures are driven by poor fuel filtration, contamination and back-leakage. 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 2.0 CDTi.
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 GM MDI/Tech2 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.
- WarningFix contamination (filter/water/debris) first; the 2.0 CDTi is sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Bosch injector 0445110327?+
A Bosch solenoid common-rail diesel injector for the GM 2.0 CDTi (A20DT/A20DTH/A20DTJ) engine. Bosch exchange 0986435201; GM OE 55566050/55496735.
Which vehicles use 0445110327?+
Vauxhall/Opel Insignia A, Astra J/GTC, Zafira C and Cascada 2.0 CDTi, plus Saab 9-5 2.0 TiD (A20DTH).
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector.
Does 0445110327 need coding?+
Yes - code the injector correction value to the correct cylinder with GM MDI/Tech2 when fitting.
What are the OE part numbers?+
GM/Vauxhall 55566050 and 55496735 reference Bosch 0445110327; the Bosch exchange number is 0986435201.
Does it fit all 2.0 CDTi power outputs?+
The A20DT/A20DTH/A20DTJ share the injector, but always confirm the OE number and engine code for the exact variant.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 2.0 CDTi 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 0445110327 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then coded on fitment.