Can i program a new key myself?

[Turbo Cow]

Just bought my 2021 mustang gt premium and it only has one key. Can I buy a new key and program it myself?

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[ORRadtech]

No.

You can program a 3rd key if you have 2 but not a second if you only have one.
My suggestion is to contact your local dealer and ask who they use for a mobile locksmith. He can program your key, delete the missing key and cut the emergency key in the fob.

 

[Unas2k5]

I used a key programmer to make an extra copy. I didn’t even need the first key.

 

[UncleSams_SVT]

I had to go to the dealership to get a second key made. I tried a locksmith but they did not have the ability to make a 2021/2022 Mustang key at that time.

I bought an OEM key online for $100, and the dealership charged me another $150 to cut/program it.

 

[ORRadtech]

I had to go to the dealership to get a second key made. I tried a locksmith but they did not have the ability to make a 2021/2022 Mustang key at that time.

I bought an OEM key online for $100, and the dealership charged me another $150 to cut/program it.

Not every locksmith can program or cut these keys. Heck, most dealers can't, or won't, cut the emergency key.
That's why I suggested he call the dealer and ask who they use.
The dealer I bought from used a mobile service that provides the keyfob, programs the car including deleting the missing key and cuts the emergency key.
I know a lot of people dismiss the emergency key but I've had to use it before and it's important to me that my fobs have one.

 

[Turbo Cow]

Thanks for the information. I called my local ford service dude and he referred me to his reputable locksmith who can program keys. Called him and he said no problem. $50.00 a key. I said cool and hung up. Then, the dealership I bought my new car from calls and says they found the other missing key! I picked it up today and now have both! They're reunited at last.

 

[RagmopInKona]

Side question, how long do the batteries tend to last.
I.E. should you think of replacing them every 3 years or 4?

 

[Cobra Jet]

Side question, how long do the batteries tend to last.
I.E. should you think of replacing them every 3 years or 4?

I just had to replace the fob batteries for my 2018, that I have had since new. I replaced because the "low key fob battery" message popped up in the dash cluster.

So for me, the fob battery only lasted 5 years. Is that normal life span for a fob battery that is used almost daily? I don't even know, but that was my interval.

 

[RagmopInKona]

I just had to replace the fob batteries for my 2018, that I have had since new. I replaced because the "low key fob battery" message popped up in the dash cluster.

So for me, the fob battery only lasted 5 years. Is that normal life span for a fob battery that is used almost daily? I don't even know, but that was my interval.

I was asking as one fob never gets used. just sits in a draw.

 

[ORRadtech]

My wife's '14 Fusion just gave the fob battery warning last week. It's a daily driven car too. 9 years on that battery but hers isn't a proximity fob so that may matter, idk. I replaced the batteries in both fobs.

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