I've had two pumps fail. They are mounted by a press-in fit into the washer reservoir bottle. To replace, siphon fluid out of the bottle, remove the electrical connector and the rubber hoses, and pull up on the pump. Clean off the reservoir where the pump goes and make sure the reservoir interior is free of dirt and gunk. To install, push the new pump back into the hole. The challenge is access down there among various headlight wires and body components.