A while back I printed out some instructions on replacing the lightbulbs in the radio display. Since I had to pull the radio to get the serial number for the radio code I decided to try to change the bulbs. I bought the replacement bulbs and some fine wire solder at Radio shack. To make a long story short, I was successful, almost to my surprise. Thank you to the person who documented the procedure. I wish I could identify you by name.
1990 535im 421,000 miles, 1987 325is, 1989 325is, 1990 m3, 1991 318is, 2001 X5 3.0