Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 17, 2026.
Fuel economy
20–21 mpgcombined; city 18–19, highway 24–26; every version of this model year
Five years of fuel
$15,470–$16,240U.S. average; Ohio $13,820–$14,510 at local prices; every version of this model year; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA's VIN data lists these trims for the 2020 Sienna. A trim's engine and numbers are shown as its own only where EPA names versions after the trim and no other version could be it; "seen with" means a source shows that engine on the trim, not that it was the only one. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 38 complaints with NHTSA about the 2020 Sienna. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Power train
8
0
0
0
Electrical system
7
0
0
0
Engine
6
0
1
0
Fuel/propulsion system
6
0
1
0
Unknown or other
6
0
1
0
Structure
4
0
0
0
Steering
3
0
0
0
Fuel system, gasoline
2
0
0
0
Service brakes
2
0
0
0
Air bags
1
0
0
0
Electronic stability control (ESC)
1
0
0
0
Seats
1
0
0
0
3 more parts
Service brakes, air
1
0
0
0
Visibility
1
0
0
0
Wheels
1
0
0
0
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 2 recall campaigns for the 2020 Sienna over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
Risk: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Remedy: Toyota will notify owners, and dealers will replace the fuel pump assembly with an improved one, free of charge. Owners of specific models were notified that remedy parts were available starting January 21, 2021. Owners of other models will be notified as remedy parts become available. Remedy parts should be available for all affected vehicles by late March 2021. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Note: This recall is an expansion of recall 20V-012. Toyota's number for this recall is 20TA02. Lexus' number for this recall is 20LA01.
Braun Corporation (Braun) is recalling certain modified 2017-2020 Toyota Sienna vehicles. The steering shaft extensions may have been improperly manufactured, possibly causing the extensions to fracture.
Risk: If the steering shaft extension completely fractures, it can cause a loss of steering, increasing the risk of a crash.
Remedy: Braun has notified owners, and dealers will replace the steering shaft extensions, free of charge. The recall began July 25, 2019. Owners may contact Braun customer service at 1-800-488-0359.
Carmakers sent NHTSA 153 service bulletins and notices that cover the 2020 Sienna, the latest on Jan 30, 2026. They tell dealers how to fix known issues.
The parts they mention most: equipment (64), electrical system (32), structure (32), engine and engine cooling (10), back over prevention (9).
NHTSA hasn't opened a defect investigation that covers this model year.
Maintenance
Oil
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2020 Sienna.
EPA class: minivan. EPA greenhouse gas score: 4 out of 10. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
Sienna Front-Wheel Drive
3.5 L, 6 cyl
Automatic (S8)
Regular Gasoline
19 / 26 / 21
Sienna All-Wheel Drive
3.5 L, 6 cyl
Automatic (S8)
Regular Gasoline
18 / 24 / 20
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 17, 2026
NHTSA recalls, file of Oct 17, 2026
NHTSA manufacturer communications, file of Oct 17, 2026
NHTSA defect investigations, file of Oct 17, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data