Had the X diagnosed at a dealer today. They said the same thing as my indy. I need a new ECU to fix my engine failsafe message. There are codes in the brain that will just not clear and everything else has been ruled out.

BMW quoted $2500 for everything
My indy quoted $1200 for the new ECU and $400 for labor.

I'm going with my indy, but wanted to know if there is anywhere I can buy the brain for cheaper.

I wanted to get a used brain/ECU, but my X is a 2001 so I've heard that a brain from something that new can not be reprogrammed.