Brought my E70 3.0SI in for a brake light out Tuesday. Dealer performed transmission update and performed complete car encoding with new software when they went to do QC check the "check engine" light came on (it has never been on before). Tech could not resolve check engine light issue so they called BMWNA engineer. It turns out that when they do the transmission update and then the complete car encoding they need to deselect the transmission portion of the encoding otherwise the software gets overwritten with the old code and causes the check engine issue. Picked up the car today and so far so good. No issues and no lights will keep you posted...