I don't have one in my daily driver. I probably should. I do have one in my dually and in my Dart. The one in my dually I mounted to the seat mount on the driver's side so that as soon as I open the door I can reach down and release it and go. The one in the Dart is between the seats. Make sure they are very secure just in case you are in an accident. A 5 lb. extenguisher can do alot of damage rolling and flying around inside your vehicle.