SKYACTIV-G (VIN L & VIN M)

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
Insert a tape-wrapped flathead screwdriver into the service hole in the position shown in the illustration.

Courtesy of MAZDA MOTORS CORP.
Move the flathead screwdriver in the direction of the arrow (1) shown in the illustration, and pull up the main fuse cover in the direction of the arrow (2) shown in the illustration to detach the main fuse cover tab from the main fuse.

Courtesy of MAZDA MOTORS CORP.
Remove the main fuse cover.
Remove the nuts.

Fig 1: Main Fuse, Engine Wiring Harness, Front Wiring Harness And Nuts With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the main fuse.
Install in the reverse order of removal.