my Tesla Model S Original (2012-2020) has a coolant leak what should I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

608 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 coolant leaks in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before starting work on electrical components.
•Allow the vehicle to cool completely before opening any coolant systems to avoid burns.

Symptoms

•Coolant puddles or stains under the vehicle
•Low coolant warning message on the dashboard
•Unusual odor of coolant inside the vehicle
•Decreased cabin heating performance
•Fluctuating temperature gauge readings
•Visible coolant residue on engine components

Diagnostic Steps

1
Inspect the ground beneath the vehicle for coolant puddles to identify the location of the leak.
2
Open the front trunk and visually inspect the coolant reservoir for cracks or damage.
3
Check the hoses connected to the coolant reservoir for signs of wear, cracks, or loose connections.
4
Examine the radiator and associated components for leaks or corrosion.
5
Use a pressure tester on the cooling system to identify any hidden leaks.
6
Scan the vehicle for any error codes related to the cooling system using a diagnostic tool.

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

•Socket set
•Screwdrivers
•Pliers
•Drain pan
•Pressure tester

Parts Required

•Coolant reservoir
•Replacement hoses
•Coolant

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Diagnostic Steps

1
Inspect the ground beneath the vehicle for coolant puddles to identify the location of the leak.
2
Open the front trunk and visually inspect the coolant reservoir for cracks or damage.
3
Check the hoses connected to the coolant reservoir for signs of wear, cracks, or loose connections.
4
Examine the radiator and associated components for leaks or corrosion.
5
Use a pressure tester on the cooling system to identify any hidden leaks.
6
Scan the vehicle for any error codes related to the cooling system using a diagnostic tool.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Allow the vehicle to cool completely before starting work to prevent burns from hot components.

2. Drain Coolant

Using a drain pan, locate the coolant drain plug on the radiator.
Carefully remove the drain plug and allow the coolant to completely drain into the pan.
Dispose of the old coolant in accordance with local regulations.

3. Replace Damaged Components

a. Coolant Reservoir Replacement

Remove the electrical connector from the coolant reservoir.
Disconnect the hoses from the reservoir by loosening the hose clamps.
Unscrew the mounting bolts holding the reservoir in place and remove it.
Install the new coolant reservoir by reversing the removal steps, ensuring a secure connection.

b. Hose Replacement

If any hoses are damaged, remove them by loosening the clamps.
Cut the old hose to ensure it can be removed easily if necessary.
Install new hoses, ensuring they are properly seated and clamps are tightened securely.

4. Refill Cooling System

Reinstall the drain plug on the radiator.
Fill the coolant reservoir with the appropriate Tesla-approved coolant mixture.
Allow the vehicle to run for a few minutes to circulate the new coolant and check for leaks.

5. Bleed the Cooling System

With the vehicle running, turn the heater on to the maximum setting.
Open the bleed valve (if equipped) to allow any trapped air to escape until a steady stream of coolant flows out.
Close the bleed valve securely once finished.