Did you check for any vacuum leaks, I would suggest to start with that, then clean the ICV, throttle body, and MAF... I get the eml,traction control, and brake ( all in yellow ) once a day at least .. Haven't not replaced anything yet, but my car idles good and there are no leaks at alll.. I have a check engine light with- idle control valve stock open which is code p1500 .. I might end up replacing that soon...keep us updated
bimmers is the way to go........