[bimmergixxer]

I just had this happen to my E92 M3 this week with the "increased emissions" on the Idrive and yellow engine symbol and when I hooked up the scanner it showed P0128. I checked my coolant level and it was on the low end, so I topped it upped with coolant and distilled water and reset the code. No new code since and the car runs great, so am I just lucky or are some people changing thermostats just because the garage says so? I hope this may help.