Unfortunately, the rubber dissolves on my car key. I then ordered an original replacement housing from Denso, the electronics are transplanted and the key is sanded (unfortunately, the key itself is tightly welded to the housing). BUT: I can open the car now and when I turn the key, I hear the starter too. However, there seems to be a secret chip in there somewhere (in addition to the remote control unit), which is responsible for the immobilizer. How can I have this unlocked?