Which Small Vibration Motor Do I Need To Replace The Rumble In My Controller?

Good diagnosis with the isolated test; that is exactly how to confirm a dead motor.

Those generic small vibration motor listings are mostly for hobby electronics, and they are the wrong place to shop. Controller rumble motors are eccentric rotating mass motors, and two things matter: the body size, which has to fit the motor cradle in the shell, and the weight on the shaft, which sets how strong the rumble feels. The left motor in an Xbox controller carries a heavier weight than the right. Fit the wrong one and it either will not sit in the cradle or the rumble feels wrong.

So buy a motor sold for your exact controller and side. Listings for Xbox One controllers often come as a left and right pair, which is handy, because the other motor is usually just as old.

Then check how yours connects. Depending on the controller, motors are either soldered to the board or joined by short wires, so open the shell and look before ordering, and match the listing to what you find.

Before replacing anything, check two cheap causes: a weight that has slipped off the shaft, or a broken wire at the motor. Either looks like a dead motor in the test.

One exception to keep in mind: a DualSense uses voice coil actuators, not spinning motors, so Xbox or DualShock motors are not interchangeable with its parts.