how to check for air in the brake lines of my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

critical

Severity

3 min read

557 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 check for air in the brake lines of your Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and safety tips.

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety goggles and gloves when handling brake fluid, as it is corrosive.
•Ensure the vehicle is securely supported on jack stands before working on the brakes.

Symptoms

•Spongy or soft brake pedal feel
•Longer stopping distances than usual
•Brake warning light illuminated on the dashboard
•Unusual noises when braking, such as hissing
•Brake fluid leakage near wheel wells or under the vehicle

Diagnostic Steps

1
Inspect the brake fluid reservoir for proper fluid level and condition.
2
Visually check brake lines and connections for any signs of leaks.
3
Perform a brake pedal pump test to assess pedal firmness.
4
Use a brake bleeder kit or vacuum pump to check for air bubbles during bleeding.
5
Check for any stored error codes in the vehicle's OBD-II system related to the braking system.

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

•Brake bleeder kit or vacuum pump
•Wrenches (specific sizes for bleeder valves)
•Brake fluid

Parts Required

•Brake fluid (DOT 3 or DOT 4, as per manufacturer specification)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the brake fluid reservoir for proper fluid level and condition.
2
Visually check brake lines and connections for any signs of leaks.
3
Perform a brake pedal pump test to assess pedal firmness.
4
Use a brake bleeder kit or vacuum pump to check for air bubbles during bleeding.
5
Check for any stored error codes in the vehicle's OBD-II system related to the braking system.

Solution

1. Preparation

Gather necessary tools and materials.
Ensure the vehicle is parked on a level surface and secured with wheel chocks.
Wear safety gloves and goggles for protection.

2. Inspect Brake Fluid

Open the hood and locate the brake fluid reservoir.
Check the fluid level; it should be between the minimum and maximum marks.
If the fluid is dark or contaminated, replace it before proceeding.

3. Bleed the Brakes

Positioning:
- Ensure the vehicle is securely raised on jack stands.
- Remove the wheel to access the brake caliper.
Connect Bleeder Kit:
- Attach a brake bleeder kit or vacuum pump to the bleeder valve on the brake caliper.
Open the Bleeder Valve:
- Use a wrench to open the bleeder valve slightly while monitoring for fluid flow.
- Have an assistant press the brake pedal to create pressure.
Check for Air Bubbles:
- Observe the fluid exiting the bleeder; air bubbles indicate trapped air.
- Close the bleeder valve before releasing the brake pedal to prevent air from re-entering.
Repeat:
- Repeat the bleeding process until no air bubbles are present, usually 3-5 cycles per caliper.
- Start bleeding from the wheel farthest from the master cylinder (typically the passenger rear).

4. Final Checks

After bleeding each brake, ensure to top off the brake fluid reservoir.
Replace wheel and lower the vehicle back to the ground.