Delphi DFIR00203D Diesel Injector

On the 1.1 / 1.4 CRDi platform, a failing Delphi DFIR00203D injector typically presents as: hard starting or long cranking, especially when hot; rough idle that improves at higher revs; misfire or uneven running under light load; black smoke under load, white smoke on cold start; loss of power and poor fuel economy.

When two or more of these appear together, suspect the injector before peripheral systems — a comparative leak-off test and live-data cylinder-balance review will isolate the failed unit without tear-down.

The documented failure modes on this platform are: excessive injector back-leak preventing rail pressure from building; nozzle wear degrading the spray pattern and causing rough running and smoke; fuel contamination damage — delphi common-rail systems are sensitive to poor-quality diesel.

Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

Run a leak-off (back-leak) comparison across all injectors before condemning one — a hard-start with P0087 often traces to a single high-return injector. Delphi injectors carry a C2I/C3I calibration code — register the new code after fitting. Rule out air in the low-pressure fuel system before replacing hardware on cranking-no-start complaints. Use fresh sealing washers and clean the injector seats before refitting.

Never condemn a common-rail injector on a fault code alone — codes identify the circuit or cylinder, while leak-off volumes and correction values identify the component.

Each remanufactured DFIR00203D is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is then calibrated on a common-rail test bench against the manufacturer's specification sheet — delivery, back-leak and response are all verified before the injector is sealed and despatched with its calibration data on file.

Every unit carries a 12 months and free UK delivery.

The DFIR00203D trusted family covers 9 verified vehicle fitments across 2 makes: Hyundai and Kia. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

DFIR00203D supersedes or cross-references 12 further OE numbers, including 28235143, 28540276, EMBR00201D, EMBR00202D, EMBR00203D, HRD357, R00201D and R00202D. Always match the reference etched on your failed unit's body — cross-references within a family are verified equivalents, but etched numbers remain the source of truth.