DFIR00203D — Technical Research
Delphi solenoid common-rail injector for the Hyundai-Kia 1.4 CRDi (D4FC) engine in the i20, i30, ix20, Ceed, Rio and Venga. Hyundai/Kia OE 33800-2A760 and 33800-2A780; Delphi equivalent R00203D (also catalogued 28540276). Replacements are coded to the ECU with the injector trim 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.
Delphi DFIR00203D 1.4 CRDi (D4FC) Common Rail Injector (Hyundai/Kia)
Delphi solenoid common-rail injector for the Hyundai-Kia 1.4 CRDi (D4FC) engine in the i20, i30, ix20, Ceed, Rio and Venga. Hyundai/Kia OE 33800-2A760 and 33800-2A780; Delphi equivalent R00203D (also catalogued 28540276). Replacements are coded to the ECU with the injector trim 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 1.4 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 code to the correct cylinder with GDS/diagnostic before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp to spec.
- MisdiagnosisRead live back-leakage data to find the weak cylinder before removal - a single failing unit upsets the small 1.4.
- WarningFix contamination (filter/water/debris) first; the 1.4 CRDi is sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Delphi injector DFIR00203D?+
A Delphi solenoid common-rail diesel injector for the Hyundai-Kia 1.4 CRDi (D4FC) engine. Hyundai/Kia OE 33800-2A760/33800-2A780; Delphi equivalent R00203D.
Which vehicles use DFIR00203D?+
Hyundai i20/i30/ix20 and Kia Cee'd/Rio/Venga 1.4 CRDi (D4FC).
Is it solenoid or piezo?+
It is a Delphi solenoid common-rail injector.
Does DFIR00203D need coding?+
Yes - code the injector trim code to the correct cylinder with GDS/diagnostic when fitting.
What are the OE part numbers?+
Hyundai/Kia 33800-2A760 and 33800-2A780 reference Delphi DFIR00203D (R00203D).
Is this the same as the 1.5 or 1.6 CRDi injector?+
No - DFIR00203D is the 1.4 CRDi (D4FC) part. Confirm the OE number and engine code before fitting.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.4 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 DFIR00203D perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then trim-coded on fitment.