i would check to see whether your key fob is programmed to unlock both passenger and driver's door or just driver's door. look in owner's manual and you will see that either are possible. If you lock doors by using key fob and it is programmed to only unlock driver's door, you can only unlock passenger door from inside. This is a safety feature to allow you to get away quickly without someone you don't want opening passenger door to ride with you. For example, someone who desires ride in your beautiful new Viper.