It sounds like you only have the one key since you've been speaking in the singular about it. The first thing I did when I got my VX was get two duplicate keys made. One hangs on the key rack in the house and the other is in one of those magnetic key containers that you put under the car somewhere. Did the same thing with my BMW key except the BMW key isn't duplicatable. It's a complicated looking thing only available from the dealer and expensive but the spare has helped when my regular key disappeared down behind the sofa cushion and took two days to find!