windshield, registration card, insurance card, drivers door jam...but most imports like Hondas need the seriel number in order to get the radio code, not the vin number. this can be found on the back of your radio or sometimes there is a way to display the seriel number on the radio. You can on Honda's but I dont know if it crosses over to Acuras. To get the seriel number on Hondas youturn the vehicle on batt powerradio offhold down presets 1 and 6, than hit power button