Why does my 2019 Mazda CX-5 KF make a grinding noise when braking?

A grinding noise when braking in your 2019 Mazda CX-5 KF can be indicative of several issues, primarily related to the brake system. Below are detailed steps to diagnose and resolve the problem.

Tools Required:

• Socket set (for wheel removal)
• Torque wrench (for reinstallation of lug nuts)
• Brake pad gauge (to measure pad thickness)
• Micrometer (to measure rotor thickness)
• Brake cleaner (for cleaning components)
• Lubricant (for caliper pins)
• Jack and jack stands (for safely lifting the vehicle)

Parts/Components That May Need Replacement:

• Brake Pads: If worn down or damaged.
• Brake Rotors: If scored or below minimum thickness.
• Brake Calipers: If they are sticking or damaged.
• Brake Hardware Kit: Includes shims, clips, and other necessary components.

Estimated Time for Repair:

• Brake Pad Replacement: 1-2 hours
• Brake Rotor Replacement: 2-3 hours (if necessary)
• Caliper Replacement: 1-2 hours (if necessary)

Safety Warnings:

• Always ensure the vehicle is securely lifted and supported on jack stands before working underneath it.
• Wear safety glasses and gloves to protect against debris and sharp edges.
• Properly torque lug nuts to the manufacturer’s specifications upon reinstallation to avoid wheel detachment.

Conclusion:

If the grinding noise persists after replacing the brake pads and/or rotors, further investigation may be necessary, including checking the brake fluid level and condition, as well as inspecting the brake lines for leaks or damage. If you are not comfortable performing these inspections or repairs, it is advisable to seek assistance from a qualified automotive technician.