Bought a pair of these to replace one of the faulty steppers on my Ender 3. Although the seller claims they are plug and play, they require a little more work than that. The pins are hardwired to the stepper motor, so you'll need to remove the standard cable and connect the stepper motor wires directly to the motherboard. The stepper motors themselves are also twice the size of a standard Ender 3 stepper motor, which introduces some issues. The adjustment screw on the back left interferes with the stepper when printing starts. This can be fixed by moving the Y-axis limit switch closer to the front of the printer. The problem is that you are now wasting about three inches of print volume. The x-axis is set to a fixed height and these steppers won't fit in it. I don't think you could actually replace the X-Stepper with any of these. While good, they are too large for use with the Ender 3 and should be avoided for this printer.
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