how to fix a coolant leak in Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

535 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 a coolant leak 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 high voltage battery before starting work.
•Allow the engine to cool completely before opening the cooling system.

Symptoms

•Coolant puddles or stains under the vehicle
•Warning message on the display indicating low coolant level
•Increased engine temperature readings
•Loss of heating in the cabin
•Unusual odors from the front of the vehicle

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or damage.
2
Check all coolant hoses for signs of wear, leaks, or loose connections.
3
Examine the coolant pump for any signs of leakage or failure.
4
Look for leaks around the radiator and its connections.
5
Use a pressure tester on the cooling system to identify leaks under pressure.
6
Scan the vehicle for any related error codes 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

•Coolant drain pan
•Socket set
•Screwdrivers
•Pliers
•Funnel
•Pressure tester (optional)

Parts Required

•New coolant reservoir (if damaged)
•New coolant hoses (if leaking)
•New coolant pump (if faulty)
•Tesla-approved coolant

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Diagnostic Steps

1
Inspect the coolant reservoir for cracks or damage.
2
Check all coolant hoses for signs of wear, leaks, or loose connections.
3
Examine the coolant pump for any signs of leakage or failure.
4
Look for leaks around the radiator and its connections.
5
Use a pressure tester on the cooling system to identify leaks under pressure.
6
Scan the vehicle for any related error codes using a diagnostic tool.

Solution

1. Preparation

Gather tools and parts.
Disconnect the high voltage battery pack for safety.
Allow the vehicle to cool down completely before starting work.

2. Drain Coolant

Tools Required: Coolant drain pan, socket set.
Locate the drain valve on the bottom of the radiator.
Position the coolant drain pan underneath the valve.
Open the drain valve and allow the coolant to fully drain into the pan.

3. Replace Damaged Components

Tools Required: Socket set, screwdrivers, pliers.
Inspect the coolant reservoir, hoses, and pump.
If any component is damaged, remove it using appropriate tools.
Replace the damaged component with a new one.
- For hoses, ensure clamps are tightened securely.
- For the coolant pump, ensure the electrical connector is reattached.

4. Reassemble and Refill Coolant

Close the drain valve after all coolant has drained.
Tools Required: Funnel.
Refill the cooling system with the appropriate coolant (Tesla recommends using their proprietary coolant).
Fill until the reservoir reaches the "full" mark.

5. Bleed the Cooling System

Start the vehicle and allow it to reach operating temperature.
Turn on the cabin heater to maximum to help circulate coolant.
Monitor the coolant level and add more if necessary until it stabilizes.

6. Final Checks

Inspect all repaired areas for leaks.
Reconnect the high voltage battery pack.