Rear Deflector

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the side step molding. (See SIDE STEP MOLDING REMOVAL/INSTALLATION .)
Remove the rivet using the following procedure.
1. Hold the rivet.
  
  Fig 1: Side Step Molding, Rear Deflector And Rivets
  Courtesy of MAZDA MOTORS CORP.
2. Set the following diameter drill to the drill.
  Drill bit diameter
  
  Rivet: 4.5 mm {0.18 in}
  CAUTION:
  - Always use a drill bit of the specified diameter when removing the rivet. If an inappropriate diameter drill bit is used, the rear deflector and the side step molding may be damaged.
3. Gouge off the rivet flange using a drill and remove the rivet.
  
  Fig 2: Drilling Rivet Flange Using Drill
  Courtesy of MAZDA MOTORS CORP.
4. Remove any rivet shavings from the rear deflector and the side step molding.
Remove the rear deflector while detaching the tab.

Fig 3: Side Step Molding, Rear Deflector And Tab
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.