Update for Engine Control Module. Should I Update?
The BMW dealer says they have an update for my CPU and its going to cost me $140 plus tax. They say it will fix my idle surge I have on cold starts. I asked if it my tweak or make anything better performance wise and he said no it will probably take some out. I am like what?
What do you guys think?
JB4 Stage 2 | Injen CAI | BMW PE | AR Catless DP | Alpina TCU Flash | Eibach Pro Kit | Custom TCKline Koni's | 19" RS7 Wheels | DWS Tires