Vehicle Exterior, 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 nuts.
Disconnect the connector.
Remove the keyless antenna.
Install in the reverse order of removal.

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

Courtesy of MAZDA MOTORS CORP.