Piston Disassembly Note

WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.

Insert a piece of wood in the caliper as shown in the figure and blow compressed air through the bleeder screw installation hole to remove the piston from the caliper body.
CAUTION:
- The piston could be damaged if blown out with great force. Blow the compressed air slowly to prevent the piston from suddenly popping out.
  
  Fig 1: Inserting Piece Of Wood In Caliper
  Courtesy of MAZDA MOTORS CORP.