Should the spare key already be programmed when the dealer gives it to you?
Are you saying you programmed your spare key without already have two other programmed keys? Did you follow the instructions in the manual?For kicks and giggles I bought a spare '15 smart key off eBay, specifically one with the pony on it... Long story short, I programmed it to 2 different '15 rental Mustangs and mine at home... All worked fine! Only problem would be if you want the spare mini key. Some eBay keys have a blank, some don't. Just follow the directions in your owner's manual.
Do you have a link to the vendor? I would like to do this as well (I have both of my original keys) to make one with the limits in place.For kicks and giggles I bought a spare '15 smart key off eBay, specifically one with the pony on it... Long story short, I programmed it to 2 different '15 rental Mustangs and mine at home... All worked fine! Only problem would be if you want the spare mini key. Some eBay keys have a blank, some don't. Just follow the directions in your owner's manual.