One problem related to air bag on-off switch has been reported for the 2009 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Ford Mustang based on all problems reported for the 2009 Mustang.
Takata recall: ref. Nhtsa id #: 10945038 submitted on January 13th. During July 2016, I received a recall notice from Ford motor company about the passenger side air bag inflator needing replaced. The letter stated that a ruptured inflator may cause serious injury or death. I have read the risks of both keeping the status quo and the risks involved with deactivating the inflator. Since the replacement part and repair notice has not been received by Ford to date, I want to deactivate the passenger side inflator until a replacement part is installed. Today, March 24th, 2017, I called the NHTSA customer service number to learn the process to have a dealership deactivate the switch. I was directed to the NHTSA website and entered "deactivate air bag" in the search box. I located appendix c and took the completed form to my nearest Ford dealership. At the end of my phone call, I asked if takata will assume the labor cost for this effort or whether I will be expected to pay. The NHTSA customer service rep told me that I would not bear that cost. I drove my car to sam pack five star Ford in plano, TX and the service tech told me that they do not do that and wondered where I got the form since it lacked a gov't letterhead and looked like something I generated myself. After more insistence on my part, the service tech went to his supervisor. The response was that 1) they never did this before 2) I would have to get further authorization from Ford customer service 3) they do not have the labels to put on/in the car and would have to order them; assuming there is a part # for them, and 4) I would be charged $135 for their labor to deactivated since it is not part of the remove and replacement of the inflator. Ford made a copy of my completed form and stated that they would pursue direction through their channels.