28657626 — Frequently Asked Questions
Verified answers about the Delphi 28657626 2.2 BlueHDi (DW12RU / 4HA / 4H03) Common Rail Injector (Peugeot Boxer / Citroen Jumper / Fiat Ducato).
What is Delphi injector 28657626?
A Delphi common-rail diesel injector for the PSA/Stellantis 2.2 BlueHDi (DW12RU) engine. OE 9824388280.
Which vehicles use 28657626?
Peugeot Boxer, Citroen Jumper/Relay and Fiat Ducato with the 2.2 BlueHDi engine, from 2019.
Is it solenoid or piezo?
It is a Delphi solenoid common-rail injector.
Does 28657626 need coding?
Yes - it must be coded to the vehicle ECU with a PSA/Delphi-capable diagnostic tool after fitting.
What are the OE part numbers?
PSA 9824388280 references Delphi 28657626 (cross 1637131480 / 28492677).
Which engine codes does it fit?
The 2.2 BlueHDi DW12RU family - 4HA (DW12RUE, BlueHDi 120) and 4H03 (DW12RUD, BlueHDi 140); confirm by VIN.
What are the symptoms of failure?
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my Boxer or Ducato run rough?
A worn or leaking injector unbalances fuelling; read live back-leakage data and bench-test the weak cylinder.
What causes these injectors to fail?
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 28657626 perform like new?
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then coded on fitment.