Hello: is only suitable for models from 2013. Please have a look at https://www.appleladen.ch/store/speicher/ssd-hd/ssd-fuer-macbook-air you will find SSDs for earlier models. Excellent service!

I bought an owc aura pro a few years ago and it worked, now it's having little issues, so I ordered a new one, it will take me 30 min. To change it

This OWC Aura Pro SSD is identical in construction to the original component and is also recognised immediately by the Mac. Therefore, no, there are no restrictions.