0445110546 — Technical Research
Bosch solenoid common-rail injector for the Renault-Nissan 1.6 dCi (R9M / Energy dCi) engine, also used on Mercedes-badged applications. Renault OE 166007885R. Replacements are coded to the ECU with the injector classification (C2I) code. 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 0445110546 1.6 dCi (R9M) Common Rail Injector (Renault/Nissan/Mercedes)
Bosch solenoid common-rail injector for the Renault-Nissan 1.6 dCi (R9M / Energy dCi) engine, also used on Mercedes-badged applications. Renault OE 166007885R. Replacements are coded to the ECU with the injector classification (C2I) code. 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 1.6 dCi R9M.
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 classification (C2I) code to the correct cylinder with CLIP/diagnostic before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp to spec.
- MisdiagnosisRead live back-leakage / cylinder-balance data to find the weak cylinder before removal.
- WarningThe R9M is sensitive to fuel contamination - replace the fuel filter and check for water-in-fuel first.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Bosch injector 0445110546?+
A Bosch solenoid common-rail diesel injector for the Renault-Nissan 1.6 dCi (R9M / Energy dCi) engine. Renault OE 166007885R.
Which vehicles use 0445110546?+
Renault Megane IV/Scenic IV/Kadjar/Trafic III, Nissan Qashqai J11/X-Trail T32 and Mercedes Citan 1.6 dCi (R9M).
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector.
Does 0445110546 need coding?+
Yes - code the injector classification (C2I) code to the correct cylinder with CLIP/diagnostic when fitting.
What is the OE part number?+
Renault 166007885R references Bosch 0445110546; 166009489R is a related alternate.
Does it fit the twin-turbo Trafic 1.6 dCi?+
The R9M 450 twin-turbo shares the injector body, but always confirm the OE number and classification for the exact power variant.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.6 dCi run rough?+
A worn or leaking injector unbalances fuelling; read live cylinder-balance data and bench-test the suspect cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 0445110546 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then C2I-coded on fitment.