Delphi EJDR00504Z Diesel Injector
2.0/2.2L TDCi · EJDR00504Z
Remanufactured Delphi EJDR00504Z diesel injector for Ford Mondeo, Transit Connect, Focus and Jaguar X-Type 2.0/2.2 TDCi applications. Direct replacement cross-referencing 4S7Q-9K546-BD, R00504Z, HRD326, 1307705, 1376699. Fits D5BA, SDBA, D6BA, HJBA, HJBB, HJBC, HJBE, FMBA, N7BA and N7BB engine codes. OEM-tested and calibrated with full flow and leak-back verification on CR318 PRO test bench. Includes 12-month unlimited-mileage warranty. Supplied as an exchange unit — return your old injector within 30 days.
7
Engine codes
13
OE / cross-refs
3
Vehicle fitments
12mo
Warranty
Common failure symptoms
On the 2.0/2.2L TDCi platform, a failing Delphi EJDR00504Z injector typically presents as: cold-start rattle and white smoke; hard starting or non-start when warm; uneven idle and cylinder knock; loss of power under load; fuel knock worsening with mileage.
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.
When two or more symptoms appear together, suspect the injector before peripherals (EGR, glow plugs, turbo). A live-data leak-off test on each cylinder is the fastest route to the failed unit.
What Causes These Injectors To Fail
The documented failure modes on this platform are: delphi injector internal wear causing rising back-leak; injector calibration drift causing rough running despite no hard fault; electrical connector faults logging injector circuit codes.
Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.
How Workshops Diagnose EJDR00504Z Faults
Delphi injectors on this platform carry a C2I calibration code — programme it after fitting or expect rough running. Run a leak-off comparison across all four injectors; a single high return identifies the failing unit. Check the injector loom and connectors above the rocker cover for heat damage before condemning injectors.
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.
How Every Unit Is Tested Before Despatch
Each remanufactured EJDR00504Z 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.
Vehicle Coverage At A Glance
The EJDR00504Z trusted family covers 3 verified vehicle fitments across 1 make: Ford. Every fitment listed on this page is registry-verified — no scraped or assumed applications.
OE & Cross-References
EJDR00504Z supersedes or cross-references 12 further OE numbers, including R00504Z, HRD326, R00503Z, EJDR00503Z, 4S7Q9K546BD, 1307705, 1376699 and 02CS27643. 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.
Related fault codes & engine guides
Trusted compatibility
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Enter your UK registration to verify your vehicle is in this trusted family. We'll cross-check the engine code against D5BA / SDBA / D6BA and the rest of the cluster.
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Frequently asked
Related engine guides
Other Delphi and same-platform injector families worth checking.
All cross-references in this family
Every reference below resolves to a PDP linked to this trusted family. EJDR00504Z, R00504Z, HRD326, R00503Z, EJDR00503Z, 4S7Q9K546BD, 1307705, 1376699, 02CS27643, JDE4157, DI356, 87058, 0870124.
Delphi know-how from the Knowledge Centre
Identification, coding, fitting and the mistakes that cause comebacks.