2015 Toyota Sienna — Full Specifications
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The 2015 Toyota Sienna is a van/minivan powered by a 3.5L 6-cyl regular gasoline engine. Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 23–25 mpg (UK) across all configurations. Owners often keep a Toyota Sienna workshop manual to hand for servicing and repairs.
Compared with the 2014 Toyota Sienna: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine | 3.5L 6-cyl |
|---|---|
| Transmission | Automatic (S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Van/Minivan |
| Fuel Economy (UK) | 25 combined / 22 urban / 30 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 25 highway mpg |
| CO₂ Emissions | 267 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,200 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2015 Toyota Sienna, all with the 3.5L 6-cyl engine. Combined fuel economy ranges from 19 to 21 mpg (US), or 23 to 25 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.5L 6-cyl | Automatic (S6) | All-Wheel Drive | 23 | 19 (16/23) | 290 | $3,550 |
| 3.5L 6-cyl | Automatic (S6) | Front-Wheel Drive | 25 | 21 (18/25) | 267 | $3,200 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2015 Toyota Sienna
Running Costs: 2015 Toyota Sienna
Covering around 8,000 miles a year in a 2015 Toyota Sienna at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,200 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2015 Toyota Sienna Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 6 safety recall campaigns that include the 2015 Toyota Sienna (as of 6 October 2026). Most affected areas: Structure (3), Service brakes (2), Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Service brakes — campaign 19V553000, reported 25 July 2019. Risk: The contact may cause failure of the rear brake hoses, resulting in a loss of vehicle control and reduced braking ability, increasing the risk of a crash.
- Service brakes — campaign 19V410000, reported 4 June 2019. Risk: The reduction in the braking system pressure may cause a loss of braking power in the rear braking system, increasing the risk of crash.
- Structure — campaign 16V858000, reported 29 November 2016. Risk: If door opens while the vehicle is moving, there would be an increased risk of injury to the vehicle occupants.
- Structure — campaign 15V240000, reported 22 April 2015. Risk: If the clip was damaged during the entertainment system installation, in the event of a side curtain air bag deployment, the trim panel may detach and strike one of the vehicle occupants, increasing the risk…
Showing the 4 most recent of 6 campaigns.
Owners have filed 232 complaints with NHTSA about the 2015 Toyota Sienna. The most-reported areas are Structure (61), Electrical system (44), Unspecified (43). Complaints include 17 reported crashes, 7 reported fires, 28 reported injuries. That is well above the median of 115 complaints across the 16 Toyota Sienna model years in our data.
Used-buyer checklist for the 2015 Toyota Sienna
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Body structure (3 recall campaigns · 61 owner complaints) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
- Electrical system (44 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Brakes (2 recall campaigns) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Engine (16 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Toyota Sienna compare to similar van/minivans? Van/Minivans in our database average around 24 mpg (UK) combined — this model sits close to that average, within 1 mpg. Its 267 g/km CO₂ figure is 25 g/km lower than the 292 g/km average for van/minivans on this site. This comparison is based on 157 van/minivans in our dataset.
Toyota models in our database average about 34 mpg (UK) combined on their most efficient configuration; the 2015 Toyota Sienna's 25 mpg is 9 mpg below that make average. Its 267 g/km CO₂ figure is 51 g/km higher than the 216 g/km Toyota average.
Of the 17 Toyota Sienna model years we cover, the 2015 ranks 10th for combined fuel economy on its best configuration (25 mpg UK combined, against a high of 43 mpg). See every Toyota Sienna year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2015 Toyota Sienna
Frequently Asked Questions
What engine does the 2015 Toyota Sienna have?
It's fitted with a 3.5L 6-cyl regular gasoline engine, paired with a automatic (s6) transmission.
What is the fuel economy of the 2015 Toyota Sienna?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 23 to 25 mpg.
How much does the 2015 Toyota Sienna cost to fuel per year?
The US EPA estimates about $3,200 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2015 Toyota Sienna have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 4 stars for frontal crash protection.
Does the 2015 Toyota Sienna have any recalls?
NHTSA lists 6 safety recall campaigns that include the 2015 Toyota Sienna (as of 6 October 2026). Most affected areas: Structure (3), Service brakes (2), Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2015 Toyota Sienna?
Among the 232 owner complaints filed with NHTSA, the most-reported areas are Structure (61 complaints), Electrical system (44 complaints), Unspecified (43 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Toyota Sienna's fuel economy good for a van/minivan?
Yes — it returns around 25 mpg (UK) combined, against a same-body-style average of roughly 24 mpg among the van/minivans we track.