EJBR03902D — Technical Research
Delphi solenoid common-rail injector for the Kia 2.9 CRDi (J3) engine, principally the Carnival/Grand Carnival/Sedona. Kia OE 33800-4X400; Delphi equivalent R03902D. Note: do not confuse with the 33800-4X800 (EJBR02901D, Hyundai Terracan) - match the OE number stamped on the original injector and the engine code. Replacements are coded to the ECU with the injector trim code. 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.
Delphi EJBR03902D 2.9 CRDi (J3) Common Rail Injector (Kia Carnival/Sedona)
Delphi solenoid common-rail injector for the Kia 2.9 CRDi (J3) engine, principally the Carnival/Grand Carnival/Sedona. Kia OE 33800-4X400; Delphi equivalent R03902D. Note: do not confuse with the 33800-4X800 (EJBR02901D, Hyundai Terracan) - match the OE number stamped on the original injector and the engine code. Replacements are coded to the ECU with the injector trim code. 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 2.9 CRDi.
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 trim/correction code to the correct cylinder with the relevant diagnostic before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp to spec.
- MisdiagnosisConfirm the OE number (33800-4X400) on the original injector - 4X400 and 4X800 are different parts/engines.
- WarningFix contamination (filter/water/debris) first; the 2.9 CRDi is sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Delphi injector EJBR03902D?+
A Delphi solenoid common-rail diesel injector for the Kia 2.9 CRDi (J3) engine in the Carnival/Grand Carnival/Sedona. Kia OE 33800-4X400; Delphi equivalent R03902D.
Which vehicles use EJBR03902D?+
Kia Carnival II, Grand Carnival and Sedona 2.9 CRDi (J3).
Is it solenoid or piezo?+
It is a Delphi solenoid common-rail injector.
Does EJBR03902D need coding?+
Yes - code the injector trim/correction code to the correct cylinder with the relevant diagnostic when fitting.
What is the OE part number?+
Kia 33800-4X400 references Delphi EJBR03902D (R03902D).
Is 33800-4X400 the same as 33800-4X800?+
No - 4X800 is a different part (EJBR02901D, Hyundai Terracan). Match the OE number stamped on your original injector and the engine code.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my Carnival 2.9 CRDi run rough?+
A worn or leaking injector unbalances fuelling; read live back-leakage 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 EJBR03902D perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then trim-coded on fitment.