Where is the drain plug on manual transmission 2004 Mazda 6 2.3?

The drain plug for the manual transmission on a 2004 Mazda 6 2.3 is located on the bottom of the transmission case. To access it, you may need to raise the vehicle and position a drain pan underneath. The plug is typically a hex or square shape, so use the appropriate tool to remove it and allow the fluid to drain completely. Always ensure to replace the drain plug securely after draining.