Vehicle Interior, Rear

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable
Remove the rear seat cushion. (See REAR SEAT CUSHION REMOVAL/INSTALLATION .)
Disconnect the connector.
Remove the nuts.
Remove the keyless antenna.
Install in the reverse order of removal.

Fig 1: Keyless Antenna, Connector & Nuts With Torque Specifications (Vehicle Interior, Rear)

Courtesy of MAZDA MOTORS CORP.