I have a 2003 BMW 325xi. Brake lights not working on 2003 BMW 325i

There are 3 brake lights on each side. Only one brake light on each side is working. I replaced the bulbs but the lights are still not working. On one side the two bottom lights are not working and on the other side an upper and lower bulbs are not working. Could this be a fuse?

Asked by for the 2003 BMW 325i