The OBDII is on your car. You can access it under the driver side dash to the left of the steering wheel. It is a small black door that says OBD in raised letters. You will need a coin to unluck the cover. They just plug in the computer.
<span style='font-size:8pt;line-height:100%'><span style='color:blue'>1998 BMW 323is Coupe, Black
18" M3 Hyper Silver Rims
2 12" Rockford Fosgate Subs; Sealed
1.0 Farad Capacitor
800 Watt 2-Way Rockford Fosgate Amplifier</span></span>