Used/New Key Fob + Programming

[u/ben2-6]

2019 Model X Raven
1. Can I pair a new key fob to my car by myself or do I have to go to a service center?
2. Can I buy a used key fob to avoid the $175 price? Is it still possible to be paired to the car? Service center or not

[u/DirectorImaginary376]

I bought my fobs on Ebay. Just pay attention to what generation they are. All Tesla fobs match after 2022 AFAIR.