2004 Isuzu Rodeo remote head key shell is meant for customers who have a working remote head key that is cracked or broken. You do not need to purchase the complete remote key if your remote functions are working normally. The blade is molded into the plastic head on remote head keys, so it must be cut to match your original key before you can use it. Once the new key shell is cut you can remove the remote part and transponder chip from your original key, place it into the new shell and it will work just as normal. The new shell will NOT start the vehicle without the original remote part and transponder chip inside of it.