Answer to: How do I replace the cabin air filter in a Mini Cooper?Here is a link to a good video on u-tube that is just what you looking for.
Answer to: I need model # for the beltYou can also go to this BMW site and select the year, model etc. of your MINI and you then get pull down menus for all the main sections of the car I use it a lot for my 2007 Cooper S and find it to be a valuable source for part numbers as well as an idea of what parts go where and how they interconnect. The link will take you to a belt that is for a 2005 MINI that I picked at random, you can backtrack to the first page and enter the data specific to your car. If you enter the last 7 digits of your VIN it will save you a lot of typing. Good luck