WARNING: This page is about a different car, the 2004 Mazda 6 and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Press the bushing out using the SSTs.
Fig 1: Removing Front Lower Arm (Rear) Bushing
Courtesy of MAZDA MOTORS CORP.
Remove the front lower arm (rear) from the press and tap the bushing out with a hammer.