The message "Check Brake Light Circuit" has been popping up on my 1997 M3. It happens sporadically. Upon visual inspection, there seems to be nothing wrong: The brake lights behave correctly, no fuses are burned. The message sometimes goes away when the ignition is turned off and back on. Sometimes it persists.
I'd like to say that this is seasonal - I've seen it happens more often when it is cold. But I can't confirm it. It seems to happen whenever the hell it feels like it. I live in Florida, so this may not mean much anyway.
I took it to the dealer, of course the message refused to show then. Mechanic grumbled something about brake pedal sensor, and $500 to diagnose (!).
Anyone encounter this problem, and any advice?
Thanks!
t o n y