DOT-4 is recommended
In Haynes workshop manual.
To add brake fluid in a 1990 Mazda Protege, you need to locate the brake fluid reservoir and check the levels. The reservoir is located on the master cylinder for the brakes.
Above the brake pedal,its black plastic.
HOW DO I TIGHTEN EMERGENCY BRAKE CABLE ON A 2002 MAZDA PROTEGE 5?
Next to the master brake cly.
about 5mm then after that they will get hot and squeak
this is a guess but most Proteges use DOT3
behind the engine on the firewall
Switch is defective or out of adjustment.
I have a manual 96 Mazda Protege, with the parking break located behind the shifter. The adjustment bolt is located right next to the parking break on the left side (drivers side) of the parking break handle. you will have to remove the rubber cover around the parking break shaft in order to see the bolt.
Without more information, it may be because of your foot.
When you remove the caliper, the pads can be pressed out by hand.