Welcome
I have a Mini Cooper in 2003.
I have to buy a set of front seats and rear seats of the Mini Cooper S in 2010.
Is mount in my car will fit into the new seats and install them at home?
I read that I'll just have to make modifications to the Airbag connectors.
Below are pictures of these seats.
Greetings from Polish

 

very interested to know if anyone's ever tried it as well.

I have an R50 with driver side wear and would love to replace them with newer seats

 

Yes they fit but the connectors don't match so you'll need to do some wiring. The passenger seat occupancy sensor may be a different design too.