Simple Installation: For vehicles with electronic control (ETC) systems, or drive by wire, this device plugs into the OE connector located behind the accelerator pedal. It is a simple installation, requiring no cutting of any wires. Three Position Settings: Off (no light): Device is not active and vehicle is stock. Sport (Green): Device is active, throttle response and acceleration are improved over the mild setting. Race (Red): Device is active, throttle response and acceleration are improved over the mild setting. Better Drivability: In addition to the increased throttle response and the improved acceleration, there is also a noticeable difference in the transmission shifts (for vehicles equipped with Automatic transmissions). The product fits the following: 2008-2014 1-Series w/ A/T, 2014 2-Series w/ A/T, 2001-2014 3-Series w/ A/T, 2014 4-Series w/ A/T, 2003-2014 Z4 w/ A/T, 2001-2015 M3 w/ A/T, 2015 M4 w/ A/T