Mazda 3 manuals

Mazda 3 Service Manual: Front Brake (Disc) Inspection

Mazda 3 Service Manual / Brakes / Disc Brakes / Front Brake (Disc) Inspection

Brake Judder Repair Hints


1. Brake judder concern has the following 3 characteristics:

Steering wheel vibration

1. The steering wheel vibrates in the rotation direction. This characteristic is most noticeable when applying brakes at a vehicle speed of 100140 km/h {62.286.9 mph}


Floor vibration

1. When applying the brakes, the vehicle body shakes back and forth. The seriousness of the shaking is not influenced by vehicle speed.

Brake pedal vibration

1. When applying the brakes, a pulsating force tries to push the brake pad back. The pulsation is transmitted to the brake pedal.

2. The following are the main possible causes of brake judder:

Due to an excessive runout (side-to-side wobble) of the disc plate, the thickness of the disc plate is uneven.

1. If the runout is more than 0.05 mm {0.002 in}

at the position 10 mm {0.39 in}

from the disc plate edge, uneven wear occurs on the disc plate because the pad contacts the plate unevenly.

2. If the runout is less than 0.05 mm {0.002 in}

, uneven wear does not occur.

The disc plate is deformed by heat.

1. Repeated panic braking may raise the temperature in some portions of the disc plate by approx. 1,000 C {1,832 F}

. This results in a deformed disc plate.

Due to corrosion, the thickness and friction coefficient of the disc plate change.

1. If the vehicle is parked in damp conditions for a long time, corrosion occurs on the friction surface of the disc plate.

2. The thickness of corrosion is uneven and sometimes appears like a wave pattern, which changes the friction coefficient and causes a reaction force.

Inspection and repair procedure

Lateral runout inspection

1. To secure the disc plate and the hub, insert the washer (thickness 10 mm {0.39 in}

, inner diameter more than 12 mm {0.47 in}

) between each hub bolt and the hub nut, then tighten all the hub nuts.


2. After tightening all the hub nuts to the same torque, put the dial gauge on the friction surface of the disc plate 10 mm {0.39 in}

from the disc plate edge.

3. Rotate the disc plate one time and measure the runout.

Thickness variation inspection

1. Clean the disc plate-to-pad friction surface using a brake cleaner.

2. Measure the points indicated in the illustration using a caliper (micrometer).

3. Subtract the minimum value from the maximum, and if the result is not within the specification, machine the disc plate using a lathe.


Disc Plate Thickness Inspection


1. Measure the thickness of the disc plate.

Disc Pad Thickness Inspection

1. Jack up the front of the vehicle and support it with safety stands.

2. Remove the wheels and tires.

3. Verify the remaining thickness of the pads.

4. Replace the pads as a set (right and left wheels) if either one is at or less than the minimum thickness.

Caliper (Rear) Disassembly/Assembly
1. Disassemble in the order indicated in the table. 1 Dust seal (See Dust Seal Assembly Note.) 2 Bleeder cap 3 ...

Front Brake (Disc) Removal/Installation [Mzr 2.0, Skyactiv G 2.0, Mzr 2.5]
1. Remove in the order indicated in the table. 2. Install in the reverse order of removal. 3. After installation, pump the brake pedal a few times and verify that the brakes do not drag. ...

Other materials:

Setting the time The clock can be set at any time when the ignition is switched to ACC or ON. To adjust the time, press the clock button ( ) for about 2 seconds until a beep is heard. The clock's current time will flash. Time adjustment To adjust the time, press the hour/ ...

Front Seat Cushion Trim Removal/Installation
WARNING: Handling a front seat (with built-in side air bag) improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings before handling a front seat (with built-in side air bag).. CAUTION: After removing a front seat ...

Front Seat Belt Removal/Installation [Two Step Deployment Control System]
WARNING: Handling the front seat belt (pre-tensioner seat belt) improperly can accidentally deploy the pre-tensioner seat belt, which may seriously injure you. Read the air bag system service warnings and cautions before handling the front seat belt.. WARNING: The side ...

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