I took apart my old key as suggested by John. Using a flat screw driver and hammer I was able to open the joints of the key.

The micro switch had become detached from the board (see attached picture) small square piece in middle of picture.

I soldered the four tags on the switch to the board. The key started working.

The next thing to do is to synchronize the system as per the Owner's Manual.

I hope this will help others in an emergency as it is time consuming to order new key.

Parry

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