Keyless2Go New Uncut Replacement Transponder Ignition Car Key 4C Chip TOY48BT4 This is a brand new uncut transponder key for select Lexus vehicles. Please check product description for vehicle fit guide. A website link to free DIY programming instructions will be provided with every order. 1 original key (black key) required in order to do self-programming. Otherwise you will need to get this key programmed by an automotive locksmith or dealership. Replacement for part numbers: TOY48BT4 CANADIAN VEHICLES: vehicles made for Canadian market do not have onboard DIY programming available and will require dealer/locksmith programming; please contact us before purchasing if you have any questions.