You can just restore your coins from the seed. I'm not sure whether you can do it directly on the device or not but you could just restore them in another wallet then send to your new ledger.
Phew, glad to hear that, I am not keep that much , about 4 Bitcoins in total in my Ledger but they are very dear to me. I will restore them in another wallet and then send to my new Ledger if anything happens to my actual Ledger. Thanks.
Ok so the question was if you lose your security card and your hardware breaks, yes you can just use the seed on the new ledger hardware, but if you dont have access to the security card then i think you are screwed, as you can see your bitcoin but cant move them, correct me if i'm wrong this is my understanding.
this makes the security card and the QR that allows you to get another one very important to secure as well.