Acura RDX 2017 Owner's Manual page 123

uuLocking and Unlocking the DoorsuKey Types and Functions
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Keyless access remote
Models without two-way keyless
access remote
Release Knob
Built-in Key
Models with two-way keyless
access remote
Release Knob
Built-in Key
122
The built-in key can be used to lock/unlock the
doors and the tailgate when the keyless access
remote battery becomes weak and the power
door lock/unlock operation is disabled.
To remove the built-in key, pull it out while
pressing the release button. To reinstall the
built-in key, push the built-in key into the
keyless access remote until it clicks.