A2C59511606 — Technical Research
Continental (Siemens VDO) piezo common-rail injector for the earlier Renault-Nissan K9K 1.5 dCi engine (Clio III/Modus/Megane II era). Renault OE 166009445R/8200380253; Nissan 16600-00Q0H. This is a distinct K9K sub-variant from A2C59507596 - confirm the OE number and engine code. Replacements are coded to the ECU with the injector classification (C2I) code. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Piezo stack degradation; Nozzle coking.
Continental/Siemens VDO A2C59511606 1.5 dCi (K9K) Piezo Common Rail Injector (Renault/Nissan/Dacia)
Continental (Siemens VDO) piezo common-rail injector for the earlier Renault-Nissan K9K 1.5 dCi engine (Clio III/Modus/Megane II era). Renault OE 166009445R/8200380253; Nissan 16600-00Q0H. This is a distinct K9K sub-variant from A2C59507596 - confirm the OE number and engine code. Replacements are coded to the ECU with the injector classification (C2I) code. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Piezo stack degradation; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the 1.5 dCi K9K.
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.
- MisdiagnosisDistinct K9K sub-variant from A2C59507596 - confirm the OE number (166009445R) and engine code before fitting.
- WarningThe K9K is very sensitive to fuel contamination - replace the fuel filter and check for water-in-fuel first.
- TestingBench-test on a piezo-capable CR tester; verify response and spray pattern before refit.
What is injector A2C59511606?+
A Continental (Siemens VDO) piezo common-rail diesel injector for the earlier Renault-Nissan K9K 1.5 dCi engine. Renault OE 166009445R/8200380253.
Which vehicles use A2C59511606?+
Renault Clio III/Modus/Megane II/Scenic II/Kangoo, Nissan Micra K12/Note and Dacia Logan/Sandero 1.5 dCi (K9K).
Is it solenoid or piezo?+
It is a Continental/Siemens VDO piezo common-rail injector.
How is it different from A2C59507596?+
Both are K9K 1.5 dCi Continental injectors but for different sub-variants/eras - confirm the OE number (166009445R vs 166006212R) and engine code.
Does A2C59511606 need coding?+
Yes - code the injector classification (C2I) code to the correct cylinder with CLIP/diagnostic when fitting.
What are the OE part numbers?+
Renault 166009445R/8200380253 and Nissan 16600-00Q0H reference this Continental injector.
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 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 plus piezo-stack ageing - fix the cause first.
Does a remanufactured A2C59511606 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated on a piezo-capable tester, then C2I-coded on fitment.