Based on data from 37 vehicles, 1,747 fuel-ups and 495,812 miles of driving, the 2003 Toyota Sienna gets a combined Avg MPG of 18.84 with a 0.16 MPG margin of error.

Any Engine Type 3.0L V6 GAS (30) V6 GAS (6) Any Body Style Mini Passenger Van (12) Any Submodel CE (7) LE (11) XLE (13) Other (6)

Below you can see a distribution of the fuel-ups with 155 outliers (8.15%) removed.

Following shows the average MPG of each of the 37 vehicles in the system.

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• ShuttleVan

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed
  Added Dec 2019 • 6 Fuel-ups

  Property of RoMiMa

• 17.1 Avg MPG

• Toyota Van

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Jun 2021 • 38 Fuel-ups

  Property of retrouble

• 31.7 Avg MPG

• Minivan

  2003 Toyota Sienna GAS V6
  Added Aug 2010 • 49 Fuel-ups

  Property of emlarson

• 17.4 Avg MPG

• Toyota Sienna

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 193 Fuel-ups

  Property of blendfixer

• 24.2 Avg MPG

• Toyota Sienna

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Jun 2023 • 32 Fuel-ups

  Property of MMGold

• 16.1 Avg MPG

• Blueberry

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Feb 2023 • 66 Fuel-ups

  Property of bagel

• 21.1 Avg MPG

• Sienna

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed
  Added Nov 2016 • 17 Fuel-ups

  Property of knelson100

• 17.8 Avg MPG

• Van - Toyota

  2003 Toyota Sienna CE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Jul 2019 • 16 Fuel-ups

  Property of retrouble

• 41.1 Avg MPG

• My Sienna

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed
  Added May 2023 • 9 Fuel-ups

  Property of theologic

• 22.5 Avg MPG

• B's Old Blue Toy

  2003 Toyota Sienna CE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Jun 2019 • 59 Fuel-ups

  Property of mattschultz4

• 19.0 Avg MPG

• AIPD Sienna

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Dec 2019 • 30 Fuel-ups

  Property of AIPDC

• 16.3 Avg MPG

• Mom's Van

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Jun 2019 • 23 Fuel-ups

  Property of gryneb

• 32.6 Avg MPG

• Sienna

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed
  Added Aug 2016 • 27 Fuel-ups

  Property of cjoly22

• 23.8 Avg MPG

• Van

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Oct 2018 • 240 Fuel-ups

  Property of caddy8

• 17.2 Avg MPG

• z old Dan's Van

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 158 Fuel-ups

  Property of dancornett

• 21.3 Avg MPG

• Van

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed Mini Passenger Van
  Added Nov 2018 • 372 Fuel-ups

  Property of fuellyLoJo

• 21.2 Avg MPG

• Sienna 2003

  2003 Toyota Sienna CE 3.0L V6 GAS Automatic 4 Speed
  Added Sep 2017 • 39 Fuel-ups

  Property of PatrolHead

• 22.2 Avg MPG

• My Sienna

  2003 Toyota Sienna XLE 3.0L V6 GAS Automatic 4 Speed
  Added Jun 2018 • 3 Fuel-ups

  Property of thefallen3113

• 16.8 Avg MPG

• Sienna

  2003 Toyota Sienna CE 3.0L V6 GAS Automatic 4 Speed
  Added Aug 2017 • 7 Fuel-ups

  Property of RevJimBob

• 20.2 Avg MPG

• Sienna

  2003 Toyota Sienna LE 3.0L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 11 Fuel-ups

  Property of rlillico

• 17.5 Avg MPG

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