how to check the coolant level in Tesla Model 3 Original (2017-2023)

Tesla Model 3 Highland (2024-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

439 words

Problem Statement

Learn how to check and maintain the coolant level in your Tesla Model 3 (2017-2023). Step-by-step guide for diagnosing and resolving coolant issues.

Affected Component

Cooling System

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the vehicle to cool before opening the coolant reservoir to prevent burns.
•Always use the recommended coolant to avoid damage to the cooling system.

Symptoms

•Warning message regarding coolant level
•Overheating of the vehicle
•Reduced HVAC performance
•Unusual engine noises (if applicable to the electric drive)
•Poor vehicle performance

Diagnostic Steps

1
Locate the coolant reservoir under the front trunk (frunk) of the Tesla Model 3.
2
Open the frunk by using the key fob or touchscreen controls.
3
Visually inspect the coolant reservoir for its fluid level against the minimum and maximum markers.
4
Check for any visible leaks around the reservoir and associated hoses.
5
If needed, use a flashlight to inspect the coolant for discoloration or debris.

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

•Funnel for easy pouring
•Clean cloth

Parts Required

•Tesla-approved coolant (if adding coolant is necessary)

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Diagnostic Steps

1
Locate the coolant reservoir under the front trunk (frunk) of the Tesla Model 3.
2
Open the frunk by using the key fob or touchscreen controls.
3
Visually inspect the coolant reservoir for its fluid level against the minimum and maximum markers.
4
Check for any visible leaks around the reservoir and associated hoses.
5
If needed, use a flashlight to inspect the coolant for discoloration or debris.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface.
Turn off the vehicle and allow it to cool down to avoid burns from hot components.

2. Inspect Coolant Reservoir

Open the frunk using the touchscreen or key fob.
Locate the coolant reservoir, which is typically a translucent plastic container.
Observe the coolant level against the marked indicators on the side of the reservoir.

3. Add Coolant (if necessary)

If the coolant level is below the minimum marker, prepare to add coolant.
- Tools Required: Funnel for easy pouring, clean cloth.
Ensure the coolant is compatible with the vehicle specifications (typically a specific EV coolant).
Remove the cap from the coolant reservoir carefully.
Using the funnel, pour the appropriate coolant into the reservoir until it reaches the maximum level.
Replace the cap securely.

4. Check for Leaks

Inspect around the coolant reservoir and hoses for any signs of leaks after adding coolant.
Monitor the area for any dripping or pooling fluid over the next few days.