If your HVAC controls are starting to wear or the screens are starting to go bad (as were mine), the replacement is a simple DIY repair with only minimal tools and skills. With the car powered off — I suppose you should actually disconnect the battery — begin by removing the trim around the HVAC control unit. Carefully pry it free using a plastic pry tool. My car has the HVAC controls in the lower position. It may be located instead in the position below the radio, but the process is essentially the same. Once the trim is removed, remove the screws on either side. If in the lower position, remove the batwings. There is a lower tab that sits behind the cross member that’s at the top of the batwings that you have to press up as you pull out the control unit. The wire harness may be very short, so spin the unit in the opening and pinch each of the connectors to release them. Note the order and color of the connectors for when it’s time to reconnect them. Connect the new control unit to the connectors. If unsure of the condition of the new control unit, reconnect the battery and turn the ignition key to the accessory position. Check functions. If all is OK, then press the control unit into position, reinstall screws, reposition batwings, and replace trim. It should take you 10-15 minutes at most.