How do you program 1998 Lexus gs 300 key?

To program a 1998 Lexus GS 300 key, you typically need to use the keyless entry remote. Start by inserting the key into the ignition and turning it to the "On" position (not starting the engine) and then back off, repeating this process five times. After the fifth turn, the doors should lock and unlock to indicate the programming mode is active. Press the "Lock" button on the remote within 30 seconds to program it; the doors will again lock and unlock to confirm successful programming.