Brake Lights On
 

My wife and I just found that when the headlights on our Ti are on, all our brake lights are also on. They make no change when you apply the brakes.

When the headlights are off the brakes lights appear to work fine.

Anyone got any thoughts.

Brake lights on
 

problem solved, it appears that when I replaced one of brake lights the recommended replacement was a single filament, when in reality it should have been a dual. go figure

glad you got it figured out, BMWs seem to do odd things when they get the wrong bulbs