I just replaced the bulbs in my OBC. There are 3, 2 on the sides for the display and 1 on the bottom for the buttons. When you pull out the radio, there is a release lever in the radio hole on the right side next to the OBC. It is hard to see and sometimes very difficult to pull. (I had to remove more of the console the first time to get the OBC out.) Pull the lever toward you and the OBC pops out. Bulbs are probably dealer items.