How many gallons are in a Toyota Sienna gas tank?
The modern Toyota Sienna’s fuel tank capacity is 18.0 gallons (about 68 liters). This article explains current and historical capacities across model years, with notes on how tank size affects driving range and refueling.
Current generation fuel tank capacity (2021–present)
What the number means for daily use
The official capacity for the current generation of Sienna models is 18.0 gallons (68 L).
- 18.0 gallons (68 L) — official fuel tank capacity for 2021–present Sienna models.
In everyday terms, actual range depends on driving conditions, load, and efficiency, but the tank size itself remains fixed at 18 gallons.
Historical capacities by generation
Before listing: Earlier generations of the Sienna used larger tanks, commonly around 20 gallons, though exact figures can vary by year and market.
- 2004–2010: 20.0 gallons (76 L)
- 2011–2020: 20.0 gallons (76 L)
Practically speaking, the 20-gallon tank was typical for many older Sienna models, but exact capacity can differ by trim or region. For precise figures, consult the manual or official specs for a specific year.
Practical implications for fueling and range
Before listing: Understanding tank capacity helps plan trips and refueling stops, especially on longer drives or in areas with limited fuel options. The Sienna’s hybrid setup in the current generation doesn’t change the tank size, but it does influence fuel economy and driving range.
- With an 18-gallon tank and typical efficiency, a modern Sienna offers a substantial driving range between fills, though actual miles depend on driving style and conditions.
For exact planning, check the owner’s manual or the vehicle’s specifications for your specific model year and trim.
Summary: The Toyota Sienna’s fuel tank capacity is 18.0 gallons in the current generation (2021–present) and historically around 20.0 gallons in earlier generations. This difference affects how far you can travel on a single tank and how often you’ll need to refuel.
