why does my Acura MDX YF3 (2022-Present) make a grinding noise when braking

Symptoms

• Grinding noise when applying brakes
• Possible vibration or pulsation in the brake pedal
• Reduced braking efficiency
• Warning lights on the dashboard (if applicable)

Diagnostic Steps

1. Visual Inspection:

   • Check the brake pads and rotors through the wheel spokes for visible wear.
   • Look for any debris lodged in the brake assembly.

2. Remove Wheel:

   • Use a lug wrench to remove the wheel for better access to the brake components.

3. Check Brake Pad Thickness:

   • Measure the thickness of the brake pads. If they are less than 3mm, they need replacement.

4. Inspect Rotors:

   • Look for scoring or grooves on the rotors. Use a micrometer to measure rotor thickness and ensure they are within specifications.

5. Listen for Noise:

   • While a helper applies the brakes, listen for noise directly from the brake components.

6. Check for Brake Fluid Leaks:

   • Inspect the brake lines and calipers for any signs of fluid leakage.

Repair Instructions

1. Gather Tools and Parts:

   • Tools Required: Lug wrench, socket set, torque wrench, brake cleaner, caliper tool, and a micrometer.
   • Parts Required: New brake pads, possibly new rotors (if worn or damaged), brake fluid (if needed).

2. Lift the Vehicle:

   • Use a floor jack to lift the vehicle and secure it on jack stands.

3. Remove the Wheel:

   • Use the lug wrench to take off the wheel.

4. Remove Brake Caliper:

   • Use the socket set to remove the caliper bolts. Carefully slide the caliper off the rotor and suspend it with a bungee cord or similar to avoid stress on the brake line.

5. Inspect and Replace Brake Pads:

   • Remove the old brake pads and compare them to the new ones.
   • If replacing, install the new pads into the caliper bracket.

6. Inspect Rotors:

   • If the rotors are worn beyond specifications, remove them by unscrewing the rotor retaining screws (if equipped) and sliding them off the hub.
   • Install new rotors if necessary.

7. Reassemble:

   • Slide the caliper back over the new pads and rotor. Reinstall the caliper bolts and torque them to manufacturer specifications.
   • Reinstall the wheel and torque the lug nuts to specifications.

8. Repeat on Other Side:

   • If necessary, repeat the process on the opposite side.

9. Lower the Vehicle:

   • Remove the jack stands and lower the vehicle back to the ground.

10. Test Brakes:

    • Before driving, pump the brake pedal a few times to seat the new pads against the rotors.

Estimated Time for Repair

• Approximately 1 to 2 hours depending on familiarity with the process and whether additional components need replacement.

Safety Warnings

• Always wear protective eyewear and gloves when working on brake systems.
• Ensure the vehicle is securely lifted and supported before working underneath it.
• Dispose of old brake pads and fluids properly according to local regulations.