Apparently this is a known problem. The rotors should be changed but it is the calipers that are the official problem. Change both and there is longevity of use.
I actually had to manufacture a part to change the brakes, because none of the piston tools fit the Mazda 3. Once you have everything off (tires, rotor, cliper) will will have to release the valve so that the pressure can be relieved. You will see 2 small indentions on the piston. You will have to alternate between turning that piston head and compressing the piston with a clamp. It took me a long time, and I broke a clamp before I realized you have to turn the piston head. I will try to get somes pics when i do it again to show everyone.
DOT 3 brake fluid
The Mazda 3 is 2mm, probably the same - 2mm
popery 4
probably the parking brake indicator
The type of brake fluid a Mazda 323 made in 1997 uses is called Dot 3. This is the standard type of brake fluid for most modern cars.
23mm front 9mm rear
1. Tire iron to remove wheel 2. 17mm wrench to remove caliper 3. C-clamp or large pliers to compress caliper piston That's all :)
DOT 3 Brake Fluid
You need a special brake piston tool to do this. Here is a link that shows what this tool looks like: http://www.lislecorp.com/tool_detail.cfm?detail=416 Basically, you put this on the end of a 3/8 inch drive, then use the side of the tool where the pins match your brake piston. Engage the pins from the tools into the piston slots, press in and turn clockwise. It will take a lot of turns to move it back in the bore.
Yes, the 2006 Mazda 3 has 4 wheel disc brakes.
My 2007 Mazda 3 has good instructions in the owner's manual, so assuming the 2005 also does, refer to it. See sources and related links below for more information on bulbs.