2003 Toyota Prius Owners Manual - Page 194

137.If you lose your keys You can purchase a new key at your Toyota dealer if you can give them the key number and master key. Even if you lose only one key, contact your Toyota dealer to make a new key. If you lose all your master keys, you cannot make new keys; the whole hybrid vehicle immobiliser system must be replaced. See the suggestion given in "Keys" on page 18 in Section 2-1. If your keys are locked in the vehicle and you cannot get a duplicate, many Toyota dealers can still open the door for you, using their special tools. If you must break a window to get in, we suggest breaking the smallest side window because it is the least expensive to replace. Be extremely cautious to avoid cuts from the glass. If you lose your wireless remote control transmitter138. You can purchase a new wireless remote control transmitter at your Toyota dealer. Have the registered identification numbers of your transmitters deleted from your vehicle by your Toyota dealer as soon as possible to avoid the possibility of theft or an accident. Then, have the identification number of your new transmitter registered. At the same time, you must bring all of the remaining transmitters to have them registered again as well. You can use the wireless remote control system with the new transmitter. Contact your Toyota dealer for detailed information. 187