Differential Oil Replacement

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.

Place the vehicle on level ground.
Remove the filler plug.
Remove the drain plug and drain the differential oil into a container.

Fig 1: Filler Plug, Drain Plug And Washer
Courtesy of MAZDA MOTORS CORP.
Install a new washer and the drain plug, and tighten.
Tightening torque

40-53 N.m {4.1-5.4 kgf.m, 30-39 ft.lbf}

Add the specified differential oil from the filler plug until the level reaches the brim of the plug hole.

Rear differential oil type	Rear differential oil capacity (approx. quantity)
MAZDA LONG LIFE HYPOID GEAR OIL SG1	0.35 L {0.37 US qt, 0.31 Imp qt}

After filling with differential oil, perform oil level inspection.
Install a new washer and the filler plug, and tighten.
Tightening torque

40-53 N.m {4.1-5.4 kgf.m, 30-39 ft.lbf}