How much transmission fluid does a Toyota Sienna use?

The Transmission Fluid capacity for a Toyota Sienna typically ranges from about 10 to 12 quarts, depending on the model year and whether you're performing a simple fluid change or a full system fluid replacement. It's essential to check the owner's manual for the specific year of your Sienna for the exact capacity and specifications. Regularly monitoring and maintaining the transmission fluid is crucial for optimal performance and longevity.