what should I do if my Tesla Model S Original (2012-2020) is leaking coolant?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

580 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 12V battery before working on any electrical components.
•Allow the vehicle to cool before opening any coolant system components to prevent burns.

Symptoms

•Coolant puddling under the vehicle
•Low coolant level warning on the dashboard
•Sweet smell of coolant inside or around the vehicle
•Overheating of the battery or motor
•Reduced performance or power loss

Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and identify the leak source.
2
Check the coolant reservoir for cracks or damage.
3
Examine hoses connected to the coolant system for signs of wear, cracking, or loose connections.
4
Inspect the radiator and its connections for leaks or damage.
5
Use a coolant pressure tester to pressurize the system and locate leaks.
6
Scan for any error codes related to the cooling 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

•Socket set
•Coolant pressure tester
•Screwdriver set
•Clean container for coolant

Parts Required

•Coolant reservoir (if damaged)
•Replacement hoses (if damaged)
•Radiator (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and identify the leak source.
2
Check the coolant reservoir for cracks or damage.
3
Examine hoses connected to the coolant system for signs of wear, cracking, or loose connections.
4
Inspect the radiator and its connections for leaks or damage.
5
Use a coolant pressure tester to pressurize the system and locate leaks.
6
Scan for any error codes related to the cooling system using an OBD-II scanner.

Solution

1. Preparation

Gather tools: socket set, coolant pressure tester, and a clean container for coolant collection.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Allow the vehicle to cool down before proceeding to avoid burns.

2. Drain the Coolant

Place a clean container under the coolant drain valve.
Open the drain valve and allow the coolant to flow into the container.
Close the drain valve once the coolant has been fully drained.

3. Replace Leaking Components

a. Coolant Reservoir

Remove any clips or screws securing the coolant reservoir.
Disconnect the hoses and electrical connectors carefully.
Install the new coolant reservoir and secure it in place.

b. Hoses

Identify the damaged hose(s) and remove the clamps using a screwdriver.
Slide the old hose off the fittings and discard it.
Install the new hose(s) and secure with clamps, ensuring they are tight.

c. Radiator

Remove the front bumper if necessary for access.
Unbolt the radiator from its mounting points.
Disconnect the upper and lower hoses carefully.
Install the new radiator and reconnect hoses, ensuring all connections are secure.

4. Refill the Coolant

Using a funnel, fill the coolant reservoir with the recommended coolant type (Tesla-approved coolant).
Start the vehicle and allow it to reach operating temperature, checking for leaks.

5. Bleed the Cooling System

With the vehicle running, open the bleed valve (if equipped) or allow the system to run with the cap off until bubbles cease.
Replace the coolant reservoir cap securely.