Update: got the car back. The same cylinders' 2 and 3 misfire codes recorded, and this time per bmw PUMA they replaced all 6 injectors, coils, and spark plugs, close to 3k in repairs (warranty). I test drove it over the weekend, although not as intensily, and no errors appeared. I also feel the engine got a bit of lighter feel - faster rpm increase, great response, very nice and clean sound. Wonder if they reset the accelerator program or something else? Will have to drive more to see for sure. Thanks everyone for their input!
2013 BMW X5 35i Sport Activity SAV, 19", Space Gray, Black Leather, Dark Wood, Convenience, Cold Weather, NAV, BMW Apps, Running Boards, BMW Crossbars, BMW Tow Hook Bike Carrier