Acura 2009 RDX - Manual (Page 126)

You should have received a key
number tag with your keys. You will
need this key number if you ever
have to get a lost key replaced. Use
only Acura-approved key blanks.
These keys contain electronic
circuits that are activated by the
immobilizer system. They will not
work to start the engine if the
circuits are damaged.
Protect the keys from direct
sunlight, high temperature, and
high humidity.
Do not drop the keys or set heavy
objects on them.
Keep the keys away from liquids.
If they get wet, dry them
immediately with a soft cloth.
The valet key does not contain a
battery. Do not try to take it apart.
The master key can be retracted into
the remote transmitter. To use the
key, push the release button to
release the key from the transmitter.
The key should be fully extended.
To retract the key, push the release
button and at the same time push the
key into the remote transmitter until
it is securely latched.
Always use the fully-extended key
when you insert it to the ignition
switch. If the key does not fully
extend, the immobilizer system may
not operate properly and may
prevent the engine from starting.
The key may come in contact with
your finger while being retracted or
extended. Make sure your fingers do
not touch the pivot of the key when
retracting or extending the key.
Retractable Master Key
Keys and Locks
120
RELEASE BUTTON
Push