1st Gen R50 Cooper Most liked posts in thread: Easily swappable OEM seats from other models into an R50?

R50 and R53 use the same seats. A JCW is just an R53.

Just search: https://www.google.com/search?q=swap+seats+r56+to+r53
In summary, it's been done successfully

 

I have been thinking of buying a replacement front drivers seat for my '06 R50. It has a leather interior, and when I bought the car last year, one of the main reasons to buy (apart from it being a Chili Red MINI) was the immaculate condition of the whole car. One owner, low miles, traded against a Lexus. I am the only regular user of the car, and want to maintain the condition of the seats.

 

Gen2 seats fit fine....
There are a couple threads on the "other" site.... Airbag connectors, etc are all fine.....one might have needed an "adjustment" but the poster, a mechanic reported he did both in an hour....

 

Mostly, the convertible went to 2008 as a 1st gen.