why does my Tesla Model 3 Original (2017-2023) make a loud noise when braking

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

538 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix loud noise when braking in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on the braking system.
•Allow the vehicle to cool before working on the brake components.

Symptoms

•Loud grinding or squeaking noise when applying brakes
•Reduced braking efficiency or responsiveness
•Vibration felt through the brake pedal
•Brake warning light illuminated on the dashboard
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear and damage using a visual check.
2
Check brake rotor condition for scoring, warping, or rust.
3
Examine brake calipers for proper function and any signs of leakage.
4
Inspect brake fluid level and condition in the reservoir.
5
Scan vehicle for error codes related to the braking system using an OBD-II scanner.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Brake bleeder tool
•Brake cleaner

Parts Required

•Brake pads
•Brake rotors (if needed)
•Brake fluid (DOT 3 or DOT 4)

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Diagnostic Steps

1
Inspect brake pads for wear and damage using a visual check.
2
Check brake rotor condition for scoring, warping, or rust.
3
Examine brake calipers for proper function and any signs of leakage.
4
Inspect brake fluid level and condition in the reservoir.
5
Scan vehicle for error codes related to the braking system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the 12V battery to ensure safety while working on the braking system.

2. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the wheel covering the brake assembly using a socket set.
2. Remove the caliper bolts using a proper socket or wrench.
3. Lift the caliper off the rotor and support it without stressing the brake line.
4. Remove the old brake pads from the caliper bracket.
5. Inspect the pads for thickness; replace if worn below manufacturer specifications (usually 3mm).
6. Install new brake pads in the caliper bracket, ensuring proper orientation.

3. Inspect and Replace Brake Rotors (if necessary)

Sub-steps:
1. Check the rotor for grooves or significant wear. Replace if necessary.
2. To remove the rotor, remove any retaining screws and slide the rotor off the hub.
3. Install the new rotor, ensuring it is seated properly.
4. Reattach any retaining screws to secure the rotor.

4. Reassemble and Test

Sub-steps:
1. Reattach the caliper over the new pads and secure it by tightening the caliper bolts to the manufacturer's torque specifications (generally around 30-40 Nm).
2. Reinstall the wheel and tighten the lug nuts to the correct torque (usually around 100-120 Nm).
3. Reconnect the battery and lower the vehicle.

5. Brake Fluid Check and Top-Off

Sub-steps:
1. Inspect the brake fluid reservoir for proper level and top-off with manufacturer-approved brake fluid (DOT 3 or DOT 4).
2. Bleed the brake system if air is present, using a brake bleeder tool.