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In the 2015 Mazda3, the recommended brake fluid type is dot 3, and for power steering, you should use dot 4 brake fluid. Brake fluid plays a crucial role in safeguarding the metal components within calipers, wheel cylinders, master cylinders, and ABS control valves. Its primary function is to protect against corrosion, especially as moisture infiltrates the system. To enhance this protective quality, corrosion inhibitors are mixed into the base brake fluid. Any decrease in brake fluid levels can activate the brake light, and leaks can severely compromise stopping power while driving. If you notice a hard-to-stop or mushy brake pedal, it could be a sign of low brake fluid causing that spongy feeling when you press the brake pedal.
For the 2015 Mazda3, it is recommended to use DOT 4 brake fluid as the power steering fluid type.
The 2015 Mazda 3 is equipped with an electronic power steering system, meaning it does not need any type of fluid for operation.
The brake fluid type needed for a 2015 Mazda 3 is DOT 3.