Remote Keyless Entry Receiver
WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
The remote keyless entry receiver is shown with the steering column removed. The remote keyless entry receiver receives the air pressure signal transmitted by the transmitter in each wheel.
Courtesy of NISSAN MOTOR CO., U.S.A.