Don't think just because you drive a newer vehicle you don't need a fire extinguisher.. also make sure if your is old that it still is good, hopefully it has a pressure gauge, and make sure to take it out and shake it and even "thump" it against a tire to make sure the ingredients are still mixed and loose, you never know when you will need it!
www.rc4x4.org/rcforum/index.php/topic,17058.msg109650/topicseen.html