Key set

1 The electronic key is a remote control with an integrated mechanical key.
The remote control has a long-life battery that is charged automatically when the electronic key is in the ignition lock. To keep the batteries charged, use each of the keys at least once every six months.
When you unlock the vehicle, the settings of various systems stored in the memory for the key in use are restored, see Personal Profile on the following page.
Information on required vehicle maintenance work is also stored in the electronic key, see "Storing service data in the electronic key" on page 106.
2 Keep the spare key in a safe place, for example in your wallet. This key is not intended for regular use.
3 The adapter is designed for installing the spare key. It can be attached to the inside of the glove compartment lid, on the left. For more information on using the adapter, refer to section "Spare key adapter".
Test yourself
A quick BMW X3 quiz: every answer comes with an explanation and a link to the manual page.