GarageDex

2025 Toyota Sienna transmission fluid capacity and fluid specs

GarageDex's fluid data shows the 2025 Toyota Sienna uses the Q610 CVT transmission, which holds 1.8 quarts (1.7 L) of fluid as a total fill, specified as WS.

Shop WS fluid Match the specification on the bottle to your manual

Key takeaways

  • Transmission: Q610 CVT transmission, 1.8 qt (1.7 L) total fill, WS fluid.
  • Total fill is the whole system; a drain-and-refill takes a third to half.
  • Brake fluid grade: read it off the reservoir cap.
  • The fluid specification is named by the source - buy a fluid that lists it.
2025 Toyota Sienna fluids by engine
EngineTransmissionTotal fillFluid specBrake fluidGear oil
2.5L 4-cylQ610 CVT1.8 qt (1.7 L)WSsee reservoir caprear 1.8 qt

Fluids for the 2025 Toyota Sienna

Buy fluid that states the specification your manual names. Multi-vehicle fluids list the specs they meet on the back label - if yours is not listed, it is the wrong bottle.

WS fluidYou need about 2 quarts for a full fillShop fluid DOT 3 or DOT 4 brake fluidA quart covers a full flushShop brake fluid Fluid transfer pumpMost modern transmissions have no dipstick tube - you fill from belowShop pumps

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Other 2025 Toyota Sienna specs

All specsEngine oilCoolant capacityMaintenance schedule

Other Sienna years

202620242023202220212020201920182017201620152014201320122011201020092008200720062005

Source: AMSOIL Auto & Light Truck lookup. Capacities are total system fills; a drain-and-refill takes less. Where no fluid specification is shown, the source lists only a catalog code, so use the specification printed in your owner's manual - the wrong transmission fluid damages a transmission.

Gear counts (for example "10-speed automatic") are from the U.S. EPA / DOE fuel economy listing for the same engine.