Delphi EJBR03902D Diesel Injector

On the Kia/Hyundai 2.9 CRDi (J3/HJ3) platform, a failing Delphi EJBR03902D injector typically presents as: hard starting or extended cranking; diesel knock and rough idle; black smoke under acceleration; loss of power / limp mode; 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: delphi injector internal wear causing rising back-leak and smoke; injector electrical faults logging circuit codes; fuel contamination damage following pump wear.

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

Run a leak-off comparison across all four injectors before ordering — multiple failures are common on neglected fuel systems. Programme the Delphi injector calibration code after fitting. Replace the fuel filter and inspect for contamination whenever an injector is replaced.

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 EJBR03902D 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-month parts warranty and free UK delivery.

The EJBR03902D trusted family covers 5 verified vehicle fitments across 2 makes: Kia and Hyundai. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

EJBR03902D supersedes or cross-references 20 further OE numbers, including R03902D, HRD343, R03901D, 33800-4X400, 33800-4X800, 33800-4X801, EJBR02401Z and R02401Z. 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.