late4lunch

Hi, I have a 1997 lexus es300 that our key was lost. My husband took out the ignition cylinder lock and in the process of replacing it a plug that comes out of the ignition switch broke. What is that plug and what does it do? Can he glue the plug back together and use it still? Help I'm scared with this self help method he is creating more issues than just the lost key?

LeX2K

A plug? What plug? Need more information. Regarding your other thread you cannot get a copy of a key and expect it to work the engine computer will reject it car will not start. You need at least one master key to be able to program additional keys. If you don't have a master key you'll need to seek out a locksmith.

late4lunch

Thanks for your response, we actually found the original key, but have already bought the new ignition lock cylinder. How do we program the new keys to work with the cars computer?

OdisJohn12

But sometimes when you doesn't have any master key then at that time keys also programmed by their vin number. Dealer can only program that keys , if you say locksmith , then they won't be able to re program keys without master keys.

speedkar9

The plug that broke is the key detection switch. It closes, telling the car that a key is inserted in the ignition, and is also responsible for the key reminder and lockout protection.

To program your new key, you can use the existing key as the "master" key, and add additional master keys yourself:

If your old master key doesn't match the new cylinder lock, you can put some aluminum foil around the new key to block its transponder signal, then bring the original key back up to the key ring so it senses that key as the master initially.

frankrodr

Making an addition key from a locksmith or dealer is really beneficial as it can also help you in future also.

DJPsystems

97 does not have a transponder chip in the key. There is no need to do any reprogramming.

ADAMMILNE

Thanks for the help but reprogramming is necessary, hiring nearby locksmith for help is vital.

dianehalle

Thanks for the help guys , i would surely call locksmith cleveland for programming the car key.