You should just be able to remove the duct for the alternator (by pulling the lilltle plastic key out), un-clip the clips holding the air cleaner assembly together, tilt the forward section toward the front of the car and I think you can clip the old filter out and slip the new one in.
Most problems are usually something simple !
Originally Posted by noego
It's Deja Poo - as in, I've heard this **** before.
Calypso Red 1992 525i with 200K miles
1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold