My '99 beetle only came with one remote key and it's very old....I got another key fob but it's not exactly the same...The old one's transmitter is 1J0 959 753 F while the new one is 1J0 959 753 DJ. The key fob are the same and I asked a vw dealer to cut it. I'm pretty sure that this model is too old to have a immobilizer. Question is, is there any way to make my vehicle recognize this new transmitter? If not I wanna know what's the difference between them? I know that they are both 315MHz.