Programming a key

[camiller23]

Hi

I have a Toyota Yaris 07 and the key was falling apart, brought a new blank and casing and got it cut.

At the time a couple of days ago i just taped the transponder piece out of the old key on to the new key and and the car has been going great, when i had time to actually cut it out and insert it yesterday into the new cut key it worked first time. Brilliant! until..

However since then the key now wont turnover the car with the new cut key and original transponder inserted even though it worked the first time? Ive read on here lots to do with programming a new key but they all involve having existing black keys.

Can anyone advise on what i can do which does not include go to my local genuine dealer.

Thank you in advance Callum.

[(mr2)]

If you don't have an existing working MASTER key it will cost you a couple of grand from the dealer.

Was the transponder chip damaged at any stage of installing it in the new key? When cutting it out of the damaged key did you cut into the chip at all? I'm guessing that you also don't have a spare key?