Replacement method of electric vehicle bearing: 1. Open the electric car seat, remove the screws on the seat and find the main controller; 2. Find the connection plug between the motor and the controller along the wires on the rear axle, note down the positions of the wires, unplug the motor wires one by one, remove the motor power cord and Hall wire, and note down the colors; 3. Then open the screws on both sides of the motor. You can see that the bearings on the stator need to be replaced together; 4. Then remove all the screws on the rear wheel motor, add up the rear wheel horizontally, with one screw side facing down, put a board on the axle pad, knock the rear axle with a hammer, remove the motor cover, replace the bearing and put it back in the reverse order.