For an oil change it doesnt need to be removed.
However if you are going in for programming or diagnostic work the CAN wires MUST be removed. Map 0 is not sufficient enough. The system will not read the vehicle, it will try to connect and not detect the VIN. You can manually enter the VIN but it still will not connect and give an error to the tech. CAN wires need to be removed, everything else can stay connected.
2013 Alpine White F10 535i. JB4 S2, Quad Tip Magnaflow Exhaust, H&R Springs
2011 335ix Le Mans Blue w/ M Sport SOLD
2003 Turbo Cobra 765rwhp/650rwtq 9.77@126 pump gas, lifting @ the 1000ft mark