2017 Tesla Model S Coolant Capacity & Type

The 2017 Tesla Model S cooling system holds approximately 13.7 to 14.8 quarts (13 to 14 liters) of coolant, although this can vary slightly by drivetrain configuration.

Quick Answer

• Total Cooling System Capacity: 13.7 - 14.8 quarts (13 - 14 liters)
• OEM Coolant Spec: Tesla Private Label (Purple/Pink, OAT - Organic Acid Technology)
• Mix Ratio: 50/50 Pre-mix is highly recommended. If using concentrate, dilute with distilled water only.

Capacity by Drivetrain Option

While specific, officially published capacities for each individual Model S drivetrain (e.g., 75D, 100D, P100D) are not always readily available, the overall system capacity for the 2017 Model S typically falls within the 13.7 to 14.8 quarts (13-14 liters) range. This capacity accounts for the cooling circuits for the battery, power electronics, and motors.

Flush Interval

Tesla generally recommends a coolant flush and service every 4 years or 50,000 miles, whichever comes first, under normal driving conditions. For severe duty, such as frequent track use, towing (if applicable to a Model S, which is rare), or consistent driving in extreme temperatures, a more frequent inspection and potential flush might be advisable, possibly every 2 years or 25,000 miles. Always refer to your owner's manual or a Tesla service center for the most accurate and up-to-date maintenance schedule.

How to Refill & Bleed

Refilling and bleeding the cooling system on a Tesla Model S requires care and, in many cases, specialized procedures. Unlike traditional internal combustion engine vehicles, the Model S cooling system is complex, integrating various heat exchangers for the battery, motors, and power electronics. Improper bleeding can lead to air pockets, potentially causing overheating or reduced efficiency of critical components.

Here's a general overview, but professional service is often recommended:

1. Safety First: Ensure the vehicle is powered down and cool before attempting any work on the cooling system.
2. Locate the Reservoir: The coolant reservoir is typically located under the frunk (front trunk).
3. Fill Slowly: Add the specified Tesla-approved coolant (50/50 mix) to the reservoir up to the "MAX" line. Fill slowly to help prevent air entrapment.
4. Bleeding Procedure: The Model S cooling system is designed to be largely self-bleeding through circulation pumps and strategically placed vent lines. However, some procedures may involve cycling the vehicle on and off, activating certain components (e.g., climate control to engage heat pumps), or using a vacuum fill tool to assist in removing air. Tesla service centers often use a vacuum fill system to ensure all air is removed, which is the most effective method for these complex systems. There are no traditional "bleed screws" in the way one might find on an older ICE vehicle.
5. Monitor Levels: After filling and operating the vehicle, allow it to cool down and recheck the coolant level. Top off as necessary.

Due to the critical nature and complexity of the Model S cooling system, it's highly recommended to have this procedure performed by a certified Tesla service center or an independent shop with specific Tesla expertise and equipment.

Common Cooling System Issues for This Generation

Owners of 2017 Tesla Model S vehicles, and the Model S generation in general, have reported some cooling system-related observations and issues, although significant widespread failures are not common given proper maintenance:

• Coolant Leaks: While not rampant, leaks can occur from hoses, connections, or heat exchangers. Due to the multiple cooling loops (battery, motors, power electronics, cabin HVAC), identifying the source of a leak can sometimes be challenging.
• HVAC System Issues: The cabin heating and cooling are integrated with the main thermal management system. Issues with heating or air conditioning performance can sometimes be traced back to problems within the coolant loops or associated components like the Supermanifold or heat pumps.
• Thermal Management System Alerts: The vehicle's sophisticated thermal management system constantly monitors temperatures. Owners might occasionally receive on-screen alerts related to "Thermal Management System" warnings, which could indicate a low coolant level, a sensor issue, or a more significant problem within one of the cooling circuits.
• Coolant Pump (PHEV) Failures: While less common, issues with the electric coolant pumps that circulate fluid through various loops could occur, leading to insufficient cooling for specific components.
• Contamination/Degradation: Using incorrect coolant types or neglecting flush intervals can lead to coolant degradation, sludge formation, and reduced cooling efficiency, potentially damaging delicate system components.

Regular inspections and adherence to Tesla's maintenance schedule are crucial for preventing these issues and ensuring the longevity and optimal performance of your Model S.

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