2020 Tesla Model 3 Coolant Capacity & Type

The 2020 Tesla Model 3 holds approximately 12.0-12.5 liters (12.7-13.2 quarts) of coolant across its various cooling loops.

Quick Answer

• Total Cooling System Capacity: 12.0-12.5 Liters (12.7-13.2 Quarts)
• OEM Coolant Spec: Tesla G-48 compatible, Blue/Green Hybrid Organic Acid Technology (HOAT).
• Mix Ratio: 50/50 Pre-mixed is recommended.

Capacity by System

Unlike traditional internal combustion engine (ICE) vehicles with a single cooling system, the Tesla Model 3 utilizes multiple independent cooling loops to manage the temperatures of the battery, power electronics, and drive units. The combined capacity for all these systems is approximately 12.0-12.5 liters.

Flush Interval

Tesla recommends checking the coolant every 2 years or 25,000 miles, and replacing it every 4 years or 50,000 miles for most Model 3 variants under normal driving conditions. For severe duty, such as frequent towing, sustained high-speed driving, or track use, it may be advisable to inspect and potentially replace the coolant more frequently. Always refer to your owner's manual for the most accurate and up-to-date maintenance schedule.

How to Refill & Bleed

Note: Servicing the cooling system on a Tesla Model 3 can be complex due to the multiple loops and high-voltage components. It is generally recommended to have this procedure performed by a qualified Tesla service center or an independent shop with experience in electric vehicles.

If you are performing a top-off or are experienced in EV maintenance, here are general steps:

1. Safety First: Ensure the vehicle is powered off and cool. Disconnect the 12V battery to de-energize certain systems.
2. Locate Reservoirs: The Model 3 has multiple coolant reservoirs, typically located under the frunk cover. Consult your owner's manual for exact locations.
3. Fill to Max Line: Slowly add the specified Tesla G-48 compatible coolant to the appropriate reservoir(s) up to the "MAX" fill line. Avoid overfilling.
4. Bleeding: Tesla vehicles are largely self-bleeding once filled, thanks to electronic pumps that circulate coolant. However, after filling, it's recommended to cycle the vehicle through various modes (e.g., HVAC on full heat, drive for a short period) to help circulate the coolant and remove any trapped air. Monitor coolant levels and top off as needed after driving cycles.
5. Vacuum Fill (Recommended for full system work): For a complete drain and refill, a vacuum fill tool is highly recommended. This evacuates all air from the system before refilling, preventing air pockets that can cause overheating or reduced efficiency. This is a task best left to professionals.

Common Cooling System Issues (Model 3 Generation)

While generally reliable, here are some common cooling system-related considerations for the Tesla Model 3:

• Coolant Pump Failures: Some early Model 3s experienced issues with auxiliary coolant pumps, leading to reduced cooling efficiency for specific components. Tesla has addressed these with updated parts or software.
• Leaking Hoses/Fittings: As with any vehicle, hoses and fittings can degrade over time, leading to minor leaks. Regular visual inspections are recommended.
• HVAC System Performance Issues: The Model 3's HVAC system is intimately tied to the main cooling loops. Issues with cooling components can sometimes manifest as reduced heating or cooling performance in the cabin.
• Battery Thermal Management Faults: The battery cooling system is vital for battery health and performance. Any faults in this system will typically trigger dashboard warnings and may lead to reduced power or range to protect the battery.
• Contamination (Rare but Critical): Using the incorrect coolant type can lead to corrosion, clogs, and costly damage to the complex cooling system components. Always use the specified Tesla G-48 compatible coolant.

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