Rear wiper motor stopped spaying and started leaking into the tailgate, new motor £120 + ouch, Ebay £35 much better, arrived wel boxed didn't work GRRRRR. so simple rebuild instructions for the rear wiper motor. Remove the wiper arm, carefully pull off the plastic washer jet while it's still on the car as it's much easier. remove the trim panel, remove the hose and the connector. undo the 3  nuts drop off the motor. Remove the back panel use TORX bit. if like me your spay tube is broken in