2023 Tesla Model 3 Fluid Type Specs

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	N/A (Electric Vehicle)	N/A
Coolant	Tesla Purple (Glycol-based)	~16-18 Liters
Transmission Fluid	N/A (Single-speed/EV specific)	~1.5-2 Liters per drive unit
Differential	See Transmission Fluid	See Transmission Fluid
Brake Fluid	DOT 4	~1 Liter
Power Steering	N/A (Electric Power Steering)	N/A
Washer Fluid	Standard Windshield Washer Fluid	~4.5 Liters
DEF	N/A (Electric Vehicle)	N/A

Engine Oil

The 2023 Tesla Model 3 is an all-electric vehicle and therefore does not use engine oil in the traditional sense. Its electric motors are sealed units and do not require oil changes.

Coolant

The Tesla Model 3 utilizes a proprietary, purple-colored, glycol-based coolant. This coolant is formulated specifically for Tesla vehicles and plays a crucial role in managing the thermal performance of the battery, power electronics, and drive units. Never mix this with other coolant types (e.g., OAT, HOAT, or universal coolants) as this can lead to corrosion, reduced cooling efficiency, and potential damage to the sophisticated thermal management system. Always use genuine Tesla coolant for top-offs or flushes to maintain warranty compliance and optimal system performance. The exact capacity can vary slightly depending on the specific Model 3 configuration (e.g., single motor, dual motor), but generally, the system holds approximately 16-18 liters.

The service interval for the coolant is typically not a routine replacement item in the same way as an internal combustion engine. However, Tesla recommends checking coolant levels periodically and replacing it only if specified during a service visit or if repairs require system drainage. Always verify specific intervals and procedures in your owner's manual or through official Tesla service documentation.

Transmission Fluid (Drive Unit Fluid)

The Tesla Model 3 uses a single-speed transmission integrated within the drive units (one for RWD models, two for AWD models). These units contain a specialized lubricant, often referred to as drive unit fluid, rather than conventional automatic transmission fluid (ATF). This fluid is crucial for lubricating the gears and bearings within the electric drive units. The exact specification is proprietary to Tesla, but it is a high-performance, low-viscosity gear lubricant designed for efficiency and durability.

Never use generic ATFs or gear oils. Using an incorrect fluid can lead to premature wear of the drive unit components, reduced efficiency, and potential failure. The capacity for each drive unit is approximately 1.5 to 2 liters. This fluid is generally considered "lifetime" by Tesla, meaning it does not have a scheduled replacement interval under normal operating conditions. However, if a drive unit is serviced or replaced, the fluid will need to be refilled to the correct level with the specified Tesla fluid.

Differential Fluid

For the Tesla Model 3, the differential function is integrated directly into the drive units and shares the same specialized lubricant as described in the "Transmission Fluid" section above. There is no separate differential fluid to service. Owners should refer to the guidelines for the drive unit fluid.

Brake Fluid

The 2023 Tesla Model 3 requires DOT 4 brake fluid. This is a critical safety item, and using the correct type is paramount. DOT 4 fluid has a higher wet and dry boiling point compared to DOT 3, which is important for maintaining brake performance under various driving conditions, including regenerative braking which still relies on the hydraulic system for final stopping power and emergencies. Never mix DOT 3 and DOT 4, although they are glycol-ether based and generally compatible, performance can be degraded. Never use DOT 5 (silicone-based) fluid, as it is incompatible with the ABS and stability control systems and can cause severe damage.

Tesla typically recommends checking brake fluid levels periodically. The general service interval for replacing brake fluid is every 2 years or 25,000 miles, whichever comes first, to ensure optimal performance and prevent moisture contamination, which can lower the fluid's boiling point and lead to a spongy pedal feel. Always refer to your owner's manual for the most accurate and up-to-date service recommendations.

Power Steering Fluid

The 2023 Tesla Model 3 is equipped with an Electric Power Steering (EPS) system. This system uses an electric motor to assist steering and does not require hydraulic power steering fluid. Therefore, there is no power steering reservoir to check or fluid to replace.

Washer Fluid

The Tesla Model 3 uses standard windshield washer fluid. Any commercially available, high-quality washer fluid designed for automotive use is suitable. For cold climates, ensure you use a fluid with anti-freeze properties to prevent the fluid from freezing in the reservoir and lines. The capacity of the washer fluid reservoir is approximately 4.5 liters.

There is no specific service interval for washer fluid other than refilling as needed. It is a good practice to check the level periodically, especially before long trips.

DEF (Diesel Exhaust Fluid)

The 2023 Tesla Model 3 is an all-electric vehicle and does not have a diesel engine. Therefore, it does not require or use Diesel Exhaust Fluid (DEF).

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