The rear door automatic open/close function stopped working with all sources. on 2008 Infiniti QX56

The rear door automatic open/close function stopped working with all sources... the button on key fob, the handle and the button on dash. Door must be opened and closed manually. What happened? What is the likley required repair and cost?
Thanks

Asked by for the 2008 Infiniti QX56
2 answers
bobby4babe@yahoo.com
well, does the door lock and unlock when using the key fob, sounds like the electric motor that lifts the rear door up is bad.