Excuse this if it is a re-post. The key fobs for my '13 GT would not work ortook several button depressions to unlock, lock, trunk, etc. I opened them up and discovered that cheapdielectric grease was put on the battery and the contacts. Cleaned it off and the fobs work perfectly.

 

Unless you have replaced the battery, which it seems you have not done from your post, the battery may also be failing. Mine started needing multiple presses in less then a year. When I checked the voltage with a voltmeter, it was well below the battery voltage.

 

Nope. Battery was fine.

 

Huh! I was having those issues too! Thanks for posting, i got aggravated and switched to my other key

 

Mine started that, had it in the dealer for something else and they told me to bring the other key in and gave me a new key under warranty.

 

The fobs are cheap and poor quality. I had to return mine to the dealer 2 months after ownership because of this same issue. They said it's such a big deal for them that they rarely have the Mustang versions in stock. Took 3 weeks to get a new one

 

I just started having this problem with just about a year on the clock. It's rather annoying especially when you are carrying lots of stuff and can only juggle hitting the button once till you start dropping things. I'm going to see about taking mine apart and check for the grease that was mentioned.

 

I'm having the same issue with my fob for my '13 I've had since May 2012. I'm going to call my dealer and try to get a replacement while it's still under warranty.

 

Glad to see this, thought only mine didnt work

 

I have had the same problem... I just open the key, wipe clean, a snap back together. I have extra batteries as I thought that might be the problem. It is not. Mine start to have an issue every 3-4 weeks. So I open the key, wipe ( takes off a small amount of dirt), an put back... Works like it should. Yes, should not but works. Sucks, yes. But not a big issue.