I know some of you may recommend buy the used original diamond shape key rather than China diamond shape key. After that just wait for someone to reprogram the key for you. If you buy the China diamond shape key is really can say waiting for reprogram but if for original key then is just not only waiting for reprogram !!!!!!!!China key will not has the ELMos transponder but it has normal PCF transponder wherelse the original key will have ELMos transponder. For China key you just need to reprogram the PCF transponder or replace the PCF transponder than you can start your engine. But original key cannot reprogram the used ELMos transponder and cannot just only replace with PCF transponder. ELMos is attached to remote circuit and if put in a PCF transponder it will crash each other and stop you to start your engine. In this situation you must remove the ELMos transponder from the circuit. After remove the ELMos transponder, the key will not charge electric to the battery and you need to do the by pass to charge the battery.Or straight away replace the ELMos transponder and reprogram it. But this solution is difficult abit and i am sure all the locksmith will not do this for you.So start from now on if you guys really want to buy the key for spare better think first before you buy.