Learn how to replace the front brake pads and rotors on Mazda CX-9, 1st generation crossover SUV. These instructions apply to CX-9 model years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017.
What you will need
A list of tools and parts required to change the brake pads and rotors on your Mazda CX-9 has been provided below.
- Mazda CX-9 Brake Pads & Rotors
- 17 and 19mm bolts (front)
- 14mm (rear)
- 21mm lug nuts
- Start engaging the parking brakes and ensure the gear shifter is in the Park. Next, access the brake fluid reservoir. Open the hood and remove the brake fluid reservoir cap. This is necessary and will make it easy later when pressing the caliper piston.
- Loosen Lug Nuts.
Before raising the car, make sure to break loose the lug nuts. Do not remove them yet; loosen them a turn or so.
- Raise Vehicle. Use a floor jack to raise one of the front wheels. Carefully lift the front of your car with a jack and then support both sides of the front with jack stands.
- Support with Jack Stands.
Always support the vehicle with jack stands. Do not rely only on a jack. Besides the jack stands and jacks, we recommend you slide the wheels under the car. Remove tire. Remove the lug nut.
- Remove the brake fluid cap. Remove the brake fluid container’s cap. The brake reservoir is located at the back right of the engine bay towards the driver’s side.
- Press the caliper piston. If you plan on using a flat screwdriver to press the caliper piston in, this is the time. If you use the C-Clamp or Brake Pad Compression tool, skip this step.
- Remove Caliper Bolts. Locate the two bolts on the back of the front brake caliper. Remove both bolts. Use a 17mm socket and a ratcheting wrench to loosen the lower and upper caliper bolts on the caliper’s back and pull each bolt slightly out. You need to slide them out to allow room to remove the caliper.
- Remove Brake Pads. Once you remove the two bolts, you will pull out the caliper and remove the brake pads. Loosen the two rotor retaining bolts using a Phillips screwdriver. These bolts can be difficult to come out.
- Notice the location of the wear sensors. If your vehicle uses wear sensors, notice the sensor’s location and the orientation of the wires. You need to make sure to install the new sensors similarly.
- Secure the brake caliper.
Use a wire to secure the brake caliper. Do not let the brake caliper hang, as this can cause damage to the brake hose. Lift the caliper off the brake pads and tie it with a rope to the strut to keep it from falling and void, putting tension on the brake line.
- Remove the Brake Pad Bracket. Before removing the rotor, remove the brake pad/caliper bracket. It is held in place with two bolts. Typically, these are 17mm bolts. Remove the bolts using a breaker bar.
- Removing the old rotor can be tricky. First, remove the screw that holds the rotor secure. Next, you need to remove the rotor. Try wiggling the rotor back and forth. If the rotor does not come loose, you may have to use a hammer to get it off. Also, spray penetrating oil and let it sit for 10 minutes before you try to remove the rotor.
It is time to install the new rotor. We recommend cleaning the hub area with a steel wire brush before installing the new rotor. Compare the old and the new rotors to ensure they are the same size and thickness, then carefully fit the new rotor. If you install new slotted rotors, ensure they are fitted correctly to spin in the proper direction.
- Install the new rotor. Slide the new rotor in place. Tighten the rotor retaining bolts.
- Next, install the bracket and tighten the two bolts on the back. Remember, the bolts on the back of the brake pad bracket must be tight. If you use a torque wrench, torque them at 70 ft-lbs.
- Using a dry towel or a rag, you can clean the dirt from the calipers and the pistons with a special spray for cleaning brake parts.
The new brake pads will probably be thicker than the older ones; you must use an even surface (e.g., the old brake pad) to press back the caliper pistons to fit the new brake pads inside the brake calipers. A C-clamp can be used to compress the pistons backward. Don’t push the pistons too far until the pistons are in line with the rubber dust boot. Put the new brake pads in place; ensure they are tightly and well-fitted.
- After fitting the new brake pads, you might experience light braking noise or squeaking; you can use CRC Disc Brake Quiet for brake pads to eliminate that noise.
- Install new caliper. Loosen the caliper from the rope carefully and tighten the lower caliper bolt using a 17mm socket and ratcheting wrench. Use brake caliper grease to lubricate the caliper bolts. Install a new caliper and tighten the two bolts.
- Refit the front wheel and spin the lug nuts with your hand. Tighten the lug nuts in a criss-cross pattern. Lower the vehicle until it puts some weight onto the wheel to prevent it from spinning, then complete tightening the lug nuts.
- Get into the driver’s seat, start the car, and pump the brake pedal a few times to restore brake pressure.
- Check the brake fluid level in the container and ensure it is above the “MIN” (minimum) indicator. If it is low, add the recommended brake fluid. Replace the brake fluid container cap once the brake fluid level is correct.
We hope you find the 2007-2017 Mazda CX-9 Front Brake Pad & Rotor Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Mazda.
- If your brake pedal used to feel soft, you might need to bleed the brake lines to flush out any air bubbles and/or replace the old brake fluid with new DOT3 brake fluid.
- Regularly check your car for any brake fluid leak signs and ensure the brake fluid volume does not decrease significantly.
- Check that the lug nuts are correctly tightened.
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