Lexus RX450H Manual page 55

1-2. Key information

Card key (if equipped)

The mechanical key that is stored inside the card key should be used
only if a problem arises, such as when the card key does not operate
properly.

If it is difficult to take out the mechanical key, press down the lock
release button using a pen tip etc. If it is still difficult to pull it out, use a
coin etc.
52
RX450h_EE

To store the mechanical key in the
card key, insert it while pressing the
lock release button.