1. Open the front cover and locate the wiper pump.
2. Unscrew the screw or buckle connecting the wiper pump and the wiper arm with a wrench or the corresponding tool purchased from the auto parts market.
3. Disconnect the power cord or interface cord connected with the water pump.
4. Remove the pipe installed on the water pump.
5. Remove the old wiper pump and install a new one.
6, reverse operation, reconnect the power cord, pipeline, wiper arm, etc.