2.2 / 3.0 CDi · Remanufactured
Mercedes-Benz OM646 / OM648 (W204 / W211 / X204) Delphi Remanufactured Common-Rail Injector. Genuine OEM markings on the injector body: EJBR04201D · A 646 070 0987 (Mercedes OE) · 250H8WS (Delphi calibration code). Confirm casting code on the injector body before fitting.
OM646.811, OM646.812, OM648.811, 646.811, 646.812
Chuffing / ticking noise from the injector area; diesel smell in the engine bay; hard starting and uneven idle; black smoke under load; loss of power with rail-pressure faults. When two or more appear together, suspect the injector before peripherals — a comparative leak-off test isolates the failed unit without tear-down.
Injector seat sealing failure allowing combustion gas blow-by and carbon build-up around the injector (widely documented on this engine family); injector back-leak beyond specification; nozzle wear causing over-fuelling. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.
Inspect around each injector for hardened carbon from seal blow-by before diagnosis — clean the seat thoroughly before fitting a replacement. Always fit a new copper sealing washer and follow the manufacturer seating procedure. Run a comparative leak-off test across all injectors before condemning one. Never condemn a common-rail injector on a fault code alone.
Each remanufactured EJBR04201D 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.
The EJBR04201D trusted family covers 5 verified vehicle fitments across 1 makes: Mercedes-Benz. Every fitment listed is registry-verified.
EJBR04201D cross-references 8 further OE numbers, including R04201D, HRD342, A6460700987, 6460700987, A6460700987 80, A646 070 0987, A646 070 0987 80 and 646 070 0987. Always match the reference etched on your failed unit's body.
UK diesel injector specialists supplying OEM tested and calibrated remanufactured injectors. Trusted by garages and mechanics nationwide with 12-month warranty on every part.