WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Press the bushing in using the SSTs
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Fig 1: Pressing Bushing In Using SSTs
Courtesy of MAZDA MOTORS CORP.
Insert the stopper plate rubber into the inner pipe of the bushing (front side).
Fig 2: Inserting Stopper Plate Rubber Into Inner Pipe Of Bushing (Front Side)