how to address Tesla Model 3 Original (2017-2023) coolant leak problems

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

573 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 leak issues in Tesla Model 3 (2017-2023). 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 electrical components.
•Allow the vehicle to cool completely before working on the coolant system to avoid burns.

Symptoms

•Coolant warning light illuminated on the dashboard
•Puddles of coolant beneath the vehicle
•Decreased cabin heating performance
•Frequent need to top up coolant reservoir
•Unusual hissing or bubbling sounds from the front of the vehicle

Diagnostic Steps

1
Inspect the coolant reservoir for visible cracks or leaks.
2
Check the hoses connected to the coolant system for signs of wear or damage.
3
Use an OBD-II scanner to check for any error codes related to the cooling system.
4
Perform a pressure test on the cooling system to identify leak points.
5
Examine the electric coolant pump for proper operation and leaks.
6
Inspect connections and seals around the battery coolant system for integrity.

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
•Coolant pressure tester
•Torque wrench
•Catch pan

Parts Required

•Coolant hoses (as needed)
•Coolant reservoir (if damaged)
•Electric coolant pump (if faulty)
•Tesla-approved coolant

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Diagnostic Steps

1
Inspect the coolant reservoir for visible cracks or leaks.
2
Check the hoses connected to the coolant system for signs of wear or damage.
3
Use an OBD-II scanner to check for any error codes related to the cooling system.
4
Perform a pressure test on the cooling system to identify leak points.
5
Examine the electric coolant pump for proper operation and leaks.
6
Inspect connections and seals around the battery coolant system for integrity.

Solution

1. Preparation

Tools Required: Socket set, screwdrivers, coolant pressure tester, torque wrench, catch pan.
Ensure the vehicle is parked on a level surface.
Allow the vehicle to cool completely before starting repairs.
Disconnect the 12V battery to avoid any electrical issues.

2. Inspect and Replace Damaged Hoses

Locate and remove the damaged coolant hose:
- Use a socket set to loosen hose clamps.
- Carefully disconnect the hose and allow any remaining coolant to drain into the catch pan.
Install the new hose:
- Position the new hose and secure it with the clamps.
- Tighten clamps to the manufacturer’s specifications (typically 15-20 inch-lbs).

3. Replace Coolant Reservoir (if necessary)

Remove the old coolant reservoir:
- Disconnect any electrical connectors.
- Remove the mounting bolts with a socket set.
Install the new coolant reservoir:
- Position it in place and secure it using the mounting bolts.
- Reconnect electrical connectors.

4. Check and Replace Electric Coolant Pump (if faulty)

Disconnect the electrical connector from the coolant pump.
Remove the mounting bolts and take out the pump.
Install the new coolant pump:
- Position it and secure with the bolts.
- Reconnect the electrical connector.

5. Refill and Bleed the Coolant System

Refill the coolant reservoir with the recommended coolant type (Tesla-approved coolant).
Start the vehicle and allow it to reach normal operating temperature.
Open the bleed screw (if applicable) to remove air from the system until coolant flows steadily, then close it.