Moderate difficulty if you have large hands. One needs to remove the glovebox to clear some room. A short handle ratchet with an 8mm (9?) socket with an extension will work. This actuator replaces the one located at the passenger footwell/sidewall side, underneath the dash. There are 3 bolts that hold the actuator up. Remove the electrical plug and unscrew the bolts. The actuator can pulled gently away. The actuator's peg at the end of the arm goes into a slot that moves a vent door. The peg needs to be inserted into the slot before installation of the replacement.