2017 Toyota Highlander Fluid Type Specs

As an ASE-certified master technician, I can't stress enough the importance of using the correct fluids for your vehicle. The 2017 Toyota Highlander is a robust and reliable SUV, and maintaining its longevity hinges significantly on adhering to Toyota's factory fluid specifications. Using the wrong fluid, even once, can lead to premature wear, reduced performance, and costly repairs.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SN/SP or ILSAC GF-5/GF-6	4-cylinder: 4.6 quarts (4.4 liters) with filter<br>V6: 4.6 quarts (4.4 liters) with filter
Engine Coolant	Toyota Super Long Life Coolant (SLLC) - Pink, HOAT (Phosphate Hybrid OAT)
Transmission Fluid	Toyota Genuine ATF WS	Approximately 3.4-3.8 quarts (3.2-3.6 liters) for drain and refill (AWD models may vary slightly)
Transfer Case	Toyota Genuine LT 75W-85 GL-4	Approximately 0.9 quarts (0.85 liters)
Front Differential	Toyota Genuine Differential Gear Oil LT 75W-85 GL-5	Approximately 1.1 quarts (1.0 liters) (AWD models)
Rear Differential	Toyota Genuine Differential Gear Oil LT 75W-85 GL-5	Approximately 0.9 quarts (0.85 liters) (AWD models)
Brake Fluid	SAE J1703 or FMVSS No. 116 DOT 3	Consult owner's manual, typically small reservoir
Power Steering	Electric Power Steering (No fluid to check/replace)	N/A
Washer Fluid	Toyota Genuine Windshield Washer Fluid or equivalent	Consult owner's manual

Engine Oil

For the 2017 Toyota Highlander, both 4-cylinder and V6 engines specify SAE 0W-20 engine oil. It is crucial to use oil that meets API SN/SP (or later) or ILSAC GF-5/GF-6 (or later) standards. Toyota places a high emphasis on these specifications for optimal fuel economy and engine protection. The capacity for both the 4-cylinder (2.7L 1AR-FE) and V6 (3.5L 2GR-FKS) engines is approximately 4.6 quarts (4.4 liters) with a filter change.

Intervals and Pitfalls: Toyota recommends oil changes every 10,000 miles or 12 months for normal driving conditions when using synthetic oil. If you frequently drive in severe conditions (e.g., towing, extreme temperatures, dusty environments), consider reducing this interval to 5,000 miles or 6 months. Using an oil with a different viscosity or not meeting the specified API/ILSAC standards can lead to increased engine wear, reduced fuel efficiency, and potential warranty issues.

Engine Coolant

The 2017 Toyota Highlander uses Toyota Super Long Life Coolant (SLLC), which is immediately recognizable by its pink color. This is a Phosphate Hybrid Organic Acid Technology (HOAT) coolant. It is pre-mixed 50/50 and designed for extended service intervals. Never use green or red conventional coolants, or even universal coolants, as they are chemically incompatible and can cause corrosion, clogs, and severe damage to your cooling system components. Mixing different coolant types can lead to premature degradation and potential engine overheating.

Intervals and Pitfalls: Toyota SLLC typically has a service life of 100,000 miles or 120 months for the first change, and then every 50,000 miles or 60 months thereafter. Always use genuine Toyota SLLC or an exact equivalent that explicitly states compatibility with Toyota SLLC pink coolant. Ensure the system is properly bled after any coolant service to prevent air pockets.

Transmission Fluid

Your 2017 Toyota Highlander, whether 2WD or AWD, requires Toyota Genuine ATF WS (World Standard) automatic transmission fluid. This is a highly specific, low-viscosity fluid designed to work with the precise tolerances and materials within Toyota transmissions. Never use "universal" automatic transmission fluids or fluids labeled for other specifications (e.g., Dexron, Mercon), as this can cause shifting problems, premature wear, and even transmission failure. The capacity for a drain and refill is typically around 3.4-3.8 quarts (3.2-3.6 liters), though a full rebuild will require significantly more. Always verify the exact capacity in your owner's manual or OEM service information.

Intervals and Pitfalls: Toyota generally considers the ATF "lifetime" for normal driving conditions. However, for severe service (towing, heavy loads, frequent stop-and-go driving, hot climates), it is highly recommended to consider a drain and fill every 60,000 to 90,000 miles. A full fluid exchange is often not recommended unless performed by a dealership with specialized equipment, as it can potentially dislodge settled particles. For most DIYers, multiple drain and fills over time are a safer alternative to gradually refresh the fluid.

Transfer Case (AWD models only)

For 2017 Highlander AWD models, the transfer case requires Toyota Genuine LT 75W-85 GL-4 gear oil. The capacity is approximately 0.9 quarts (0.85 liters). It is critical to use the specified GL-4 fluid as GL-5 fluids contain different additive packages that can be corrosive to "yellow metals" (e.g., brass synchronizers) commonly found in transfer cases.

Intervals and Pitfalls: Toyota often specifies a longer interval for transfer case fluid, but for optimal longevity, particularly if you engage in AWD use, towing, or off-road driving, consider checking and potentially replacing the fluid every 30,000-60,000 miles. Ensure the fill and drain plugs are properly torqued after service.

Front Differential (AWD models only)

The front differential in AWD 2017 Highlander models uses Toyota Genuine Differential Gear Oil LT 75W-85 GL-5. The capacity is around 1.1 quarts (1.0 liters). Unlike the transfer case, the front and rear differentials require a GL-5 fluid due to the higher pressure and sliding friction present in their gear sets.

Intervals and Pitfalls: Similar to the transfer case, a service interval of 30,000-60,000 miles is prudent for preventative maintenance, especially under severe driving conditions. Always use a GL-5 rated gear oil. While 75W-90 GL-5 might seem similar, stick to the specified 75W-85 for optimal performance and efficiency.

Rear Differential (AWD models only)

For the rear differential in AWD 2017 Highlander models, the specified fluid is also Toyota Genuine Differential Gear Oil LT 75W-85 GL-5. The capacity is approximately 0.9 quarts (0.85 liters). It is important to confirm that your vehicle does not have an electronic limited-slip differential (LSD) which would require a specific LSD additive, though this is not commonly found on the 2017 Highlander. Always verify in your owner's manual.

Intervals and Pitfalls: Adhere to the same service considerations as the front differential. Using the correct GL-5 fluid is essential for the longevity of the differential gears. Ensure you use new crush washers on the drain and fill plugs to prevent leaks.

Brake Fluid

The 2017 Toyota Highlander requires SAE J1703 or FMVSS No. 116 DOT 3 brake fluid. It is crucial to use DOT 3 and never substitute with DOT 4, DOT 5, or DOT 5.1 unless explicitly stated by the manufacturer (which it is not for this model). Higher DOT ratings have different boiling points and can have different chemical compositions that are incompatible with your Highlander's brake system components. DOT 5, which is silicone-based, is particularly damaging and must never be used.

Intervals and Pitfalls: Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to internal corrosion. Toyota often recommends checking the fluid level at every service. It is generally recommended to flush and replace brake fluid every 2 to 3 years or 30,000 miles, especially in humid climates, to maintain optimal braking performance and prevent expensive ABS component failure.

Power Steering Fluid

The 2017 Toyota Highlander is equipped with Electric Power Steering (EPS). This means there is no hydraulic power steering pump or fluid reservoir to check or replace. This system uses an electric motor to assist steering, making it a maintenance-free component in terms of fluid.

Washer Fluid

For the windshield washer system, use Toyota Genuine Windshield Washer Fluid or any commercially available, high-quality windshield washer fluid. It is advisable to use a fluid that offers freeze protection appropriate for your climate. Avoid using plain water, particularly in freezing temperatures, as it can freeze and damage the washer system components.

Intervals and Pitfalls: Top up as needed. In winter, use a fluid with a lower freezing point. Some premium fluids also offer bug and tar removal properties.

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