0445110489 — Technical Research
Bosch solenoid common-rail injector for the Ford 1.5 TDCi (DV5) engine, fitted across Fiesta, B-MAX, C-MAX, Focus, EcoSport, Transit Connect and Transit Courier. Ford service number CV6Q-9F593-AA; Bosch alternate 0986435288. Failures are driven mainly by poor fuel filtration, contamination and back-leakage wear; a replacement is coded to the ECU via its IQA correction value. 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 0445110489 1.5 TDCi Common Rail Injector (Ford Fiesta/Focus/Transit Connect)
Bosch solenoid common-rail injector for the Ford 1.5 TDCi (DV5) engine, fitted across Fiesta, B-MAX, C-MAX, Focus, EcoSport, Transit Connect and Transit Courier. Ford service number CV6Q-9F593-AA; Bosch alternate 0986435288. Failures are driven mainly by poor fuel filtration, contamination and back-leakage wear; a replacement is coded to the ECU via its IQA correction value. 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 1.5 TDCi.
Excess back-leakage bleeds 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 IQA/correction value to the correct cylinder with Ford IDS/FDRS before road test.
- InstallationRenew the copper combustion washer and clamp bolt and torque to spec.
- MisdiagnosisRead live correction and back-leakage data to find the weak cylinder before removal.
- WarningFix contamination (filter/water/debris) first to protect the new injector.
- TestingBench-test across delivery and back-leakage points and verify spray pattern.
What is Bosch injector 0445110489?+
A Bosch solenoid common-rail diesel injector for the Ford 1.5 TDCi (DV5) engine. Ford service number CV6Q-9F593-AA; Bosch alternate 0986435288.
Which vehicles use 0445110489?+
Ford Fiesta, B-MAX, C-MAX, Focus, EcoSport, Transit Connect and Transit Courier 1.5 TDCi.
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector.
What is the Ford part number?+
Ford service numbers include CV6Q-9F593-AA and CV8Q-9F593-AA referencing Bosch 0445110489.
Does it need coding?+
Yes - write the IQA/correction value to the correct cylinder with Ford IDS/FDRS when fitting.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.5 TDCi Fiesta run rough?+
A leaking or worn injector unbalances fuelling; read live correction data and bench-test to confirm the cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause, not just the injector.
Do I need a new copper washer?+
Yes - the combustion washer is single-use; reusing it causes blow-by and carbon build-up.
Does a remanufactured 0445110489 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then coded on fitment.