Yaw Rate Sensor
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
The yaw rate sensor (located in the audio-navigation unit) detects the direction change (angular speed) of the vehicle The sensor is an oscillation gyro built into the navigation unit