Home FAQ

What kind of transmission fluid does a 2018 Toyota Sienna take?

The 2018 Toyota Sienna minivan requires a specific type of transmission fluid to ensure proper operation and longevity of the vehicle's transmission. According to Toyota's recommendations, the 2018 Sienna should use a Toyota-approved automatic transmission fluid (ATF).

Recommended Transmission Fluid for 2018 Toyota Sienna

The recommended transmission fluid for a 2018 Toyota Sienna is Toyota Genuine ATF WS. This is a synthetic, high-performance automatic transmission fluid that meets Toyota's stringent specifications for their vehicles. Some key points about the recommended fluid:

Toyota Genuine ATF WS is a Toyota-approved automatic transmission fluid

It is a synthetic fluid designed for optimal performance and longevity in Toyota transmissions

Using a non-approved fluid could potentially damage the transmission and void the vehicle's warranty

It's important to only use the transmission fluid recommended by Toyota for the 2018 Sienna. Using the wrong fluid could lead to transmission problems down the road.

Transmission Fluid Change Interval

Toyota recommends changing the transmission fluid in a 2018 Sienna every 60,000 miles or 60 months, whichever comes first. This maintenance is crucial to keep the transmission operating at its best and prevent premature wear or failure.

Properly maintaining the transmission fluid is an important part of caring for a 2018 Toyota Sienna. By using the recommended Toyota Genuine ATF WS fluid and following the manufacturer's service schedule, Sienna owners can help ensure their vehicle's transmission provides reliable performance for years to come.

Does Toyota need special transmission fluid?

Using the right transmission fluid extends service life. Toyota recommends Toyota ATF for automatic models and Toyota CVT Fluid for vehicles with a CVT. Using non-approved fluids can cause premature wear and shifting issues.

What type of transmission fluid goes in a Toyota Sienna?

The transmission fluid type for a Toyota Sienna depends on the model year, but commonly used fluids are Toyota Genuine ATF WS (World Standard) for newer models (like 2009 and 2015) and ATF T-IV (Type 4) for some older models. Newer models (around 2005-2013) may use Dexron VI. Always check your owner's manual to confirm the specific type for your vehicle's year to ensure correct fluid and avoid damage.

Fluid types by model year (general guidance)

ATF T-IV: Often required for some older automatic transmissions, but do not use if your manual specifies WS or Dexron.
Toyota Genuine ATF WS: Typically recommended for models like the 2009 Sienna and 2015 Sienna.
Dexron VI: Often specified for models in the mid-2000s to early 2010s, such as 2005, 2007, 2010, and 2013 Siennas.
JWS 3324 or NWS9638: An alternative specification that may be used for models like the 2015 Sienna.

Important considerations

Consult your owner's manual: This is the most reliable source for the correct transmission fluid type for your specific vehicle year and model.
Use the correct fluid: Using the wrong fluid can cause shifting problems and damage the transmission.
Check fluid level and condition: Regularly check the transmission fluid level with the dipstick when the engine is warm and running. Low or dirty fluid can lead to slipping or overheating.

What kind of transmission does a 2018 Toyota Sienna have?

8AT 8-speed automatic transmission
The Sienna is a powerful cruiser with the D-4S direct-injection V6 engine and Direct Shift – 8AT 8-speed automatic transmission it received for 2017. For 2018, it's a quieter cruiser, too, on certain grades thanks to a new acoustic windshield (SE only) and laminated front-row side window glass (Limited only).

What is the difference between Toyota CVT fluid Fe and TC?

Toyota CVT Fluid TC is for older, conventional CVTs, while FE is a lower-viscosity, fully synthetic fluid designed for newer, fuel-efficient CVTs. FE is optimized for better fuel economy and smoother operation in modern transmissions, whereas TC is formulated for the performance needs of older CVT systems. They are not interchangeable and using the wrong fluid can cause transmission issues.

Toyota CVT Fluid TC

For: Older, conventional Toyota CVT systems.
Key Feature: Specifically formulated to meet the performance requirements of these transmissions, providing protection against wear and tear.

Toyota CVT Fluid FE

For: Newer, "energy-saving" and more advanced Toyota CVT systems.
Key Features:
- Lower Viscosity: Designed to reduce drag and improve fuel efficiency.
- Fully Synthetic: Offers excellent performance and protection.
- Additive Structure: Different from TC, optimized for the demands of modern, fuel-efficient CVTs.

How to choose the right fluid

Check the owner's manual: This is the most reliable source for your specific vehicle.
Look for a sticker: Some vehicles have a sticker on the door jamb or under a wheel well cover that specifies the fluid type (e.g., "TC" or "FE").
Consult a dealership: If you are unsure, a Toyota dealership can confirm the correct fluid for your car.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.