Delphi DCR02501AA1 Diesel Injector

1.9D · Remanufactured

Delphi DCR02501AA1 remanufactured diesel injector for Citroen and Peugeot 1.9D DW8B engines. Professionally tested and calibrated to OEM specification. Includes: OEM Tested, 12 Month Warranty, Free UK Delivery.

Shared engine codes

WJY, WJZ

Compatible vehicles

Common DCR02501AA1 injector failure symptoms

Hard starting or extended cranking; rough or uneven idle; loss of power under load; excess smoke from the exhaust; cylinder misfire or contribution fault codes. When two or more appear together, suspect the injector before peripherals — a comparative leak-off test isolates the failed unit without tear-down.

What causes these injectors to fail

Injector back-leak beyond specification; nozzle wear degrading the spray pattern; combustion gas leaks past the injector seat washer. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How workshops diagnose DCR02501AA1 faults

Run a comparative leak-off (back-leak) test across all injectors before condemning a single unit. Compare requested vs actual rail pressure in live data at idle and under load. Inspect injector connectors and wiring before replacing hardware. Never condemn a common-rail injector on a fault code alone.

How every unit is tested before despatch

Each remanufactured DCR02501AA1 is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is calibrated on a common-rail test bench against the manufacturer's specification — delivery, back-leak and response verified — and despatched with a 12-month parts warranty and its calibration data on file.

Vehicle coverage at a glance

The DCR02501AA1 trusted family covers 6 verified vehicle fitments across 2 makes: Citroen and Peugeot. Every fitment listed is registry-verified.

OE & cross-references

DCR02501AA1 cross-references 2 further OE numbers, including LDCR02501AA1 and SU00100486. Always match the reference etched on your failed unit's body.

Related fault codes & engine guides

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UK diesel injector specialists supplying OEM tested and calibrated remanufactured injectors. Trusted by garages and mechanics nationwide with 12-month warranty on every part.