What tool to check if m4 has been remapped?

[Jk89]

I’m considering buying a g82 M4 from an independent dealer.

It has a few mods so I want to check if it has ever been remapped or ever had bm3.

Insurance companies seen to be able to check in seconds now so I was wondering what I need to buy to do the same?

[Jk89]

Thanks for the replies.

I worry about bm3 and jb4 more than anything.

I’ll get a bmw inspection.