John Deere Remanufactured Electronic Unit Injector – RM100251. John Deere Remanufactured Electronic Unit Injector. Replaces SE501959 and Remanufactured replacement for RE533608. Refer to John Deere parts catalog for fitment. New – Open Box (Plastic bag containing injector is opened) Please view associated photos. Please note : It is the responsibility of the purchaser to ensure the correct fitment of these parts. Techsource13 is not responsible for confirming or ensuring vehicle/application fitment. We are simply the reselling party. Techsource13 will not and can not facilitate. All sales are final.