 Rear air clicking
I just fix mine. The problem is the plastic motors that control the blend doors on the rear air. They strip out and slip. Remove all the plastic from the left rear to expose the air unit. The only tool you will need for this is a #50 star socket to pull the lower seat belt bolt loose. Loosen the 3 bolts that hold the rear air in place (10mm)one you will need a deep well, and pull the the air unit forward from the front carefully and you will see the plastic motors. Should be white with wires pluging into the top of them. 3 8mm hold them in and they slid right out and you can replace them. It's easier to replace them both than trying to figure which one is bad. If one is broken, the other soon will be. Tell the dealer you need the rear air blend door motors. My parts #s were 1L2Z-19E616-BA 2L2Z-19E616-BA . I bought each motor wholesale for around $38 each. They retail for around $67. It's not a hard fix, about an hour. the hardest part is getting the seat belt bolt out. Good luck and email me any questions. | 
