Just had a call from the wife. The unlock button doesn't work on the key fob. The other two do however. She took the key apart and back together and it works. 
My thoughts are dry solder joint somewhere. 

 

Anyideas on anything else it could be ?

Could be the battery is on the way out?

I did think that but only 1 button didn't work

9 hours ago, ryan-re said:

Just had a call from the wife. The unlock button doesn't work on the key fob. The other two do however. She took the key apart and back together and it works. 
My thoughts are dry solder joint somewhere. 

 

 

 

You might be right. I had a similar situation on another make of car after the key fob had been dropped onto a hard surface.

I found a hairline crack on a track on the pc board, but yours could be a mechanically induced dry joint at a component too.