Rear Mudguard

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Remove the fastener.
LH

Fig 1: Locating Fastener And Cap Nut On Rear Mudguard
Courtesy of MAZDA MOTORS CORP.

RH

Fig 2: Cap Nut Location On Rear Mudguard
Courtesy of MAZDA MOTORS CORP.
Remove the cap nuts.
Remove the rear mudguard in the direction of the arrow shown in the figure.

Fig 3: Removing Rear Mudguard
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.