Most common 2020 Toyota Sienna problems
Share of the 38 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Toyota Sienna complaints by model year
Best Sienna years: 2020, 2019, 2018. Years to avoid: 2005, 2006, 2011, 2008, 2007. Compare all years →
2020 Toyota Sienna recalls (2)
Fuel system, gasoline › Delivery › Fuel pump
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 4Runner, 2019-2020 Avalon, 2019 Corolla Hatchback, 2017-2019 Highlander, 2018-2020 Camry, 2020 Corolla, 2018-2019 Land Cruiser, 2017-2020 Tacoma, 2019-2020 RAV4, 2019-2020 Sequoia, 2017-2020 Sienna, 2019-2020 Tundra, 2018-2020 Lexus ES350, 2017…
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.
Steering
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.
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.
What 2020 Toyota Sienna owners say
Fuel & propulsion system
The contact owns a 2020 Toyota Sienna. The contact stated while driving approximately 60-65 MPH, the vehicle stalled temporarily. Several unknown warning lights were illuminated. The contact depressed the accelerator pedal and was able to continue driving. The contact later received notification of NHTSA Campaign Number: 20V682000 (Fuel System, Gasoline) and the vehicle was taken to the dealer for the recall repair. The contact stated that the fuel pump was replaced; however, the failure recurred a year later. The vehicle was taken to the dealer however, the mechanic was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 10,000. The consumer stated the pump was replaced but the problem still occurs.
ON jUNE 3, 2021 I experienced a drastic loss in power and all warning light illuminated on the dash , was able to get of the highway to a safe area and vehicle ceased to function . This happened after the fuel pump recall was performed at Ed Morse Toyota in Delray Beach around February. It had been functioning perfectly up until this massive failure. When tow truck operator arrived and tried to start, is caught fire and was severely damaged.
Transmission & drivetrain
The vehicle is a 2020 Toyota Sienna. While driving, the engine suddenly shut off without warning, creating a dangerous situation and loss of power. This occurred while transporting children, increasing the safety risk. A mechanic inspected the vehicle and diagnosed a failure of the low-pressure fuel pump. The problem appears intermittently - sometimes the vehicle runs normally, and other times it stalls or loses power. The check engine light has turned on and off. This issue matches the known defect related to the Denso fuel pump recall affecting many Toyota vehicles from similar model years. However, my VIN is not included in the recall. This is a serious safety concern because the engine can shut off unexpectedly while driving, which could lead to an accident. …
"I've owned the vehicle for five years, and recently I started hearing a whining noise coming from the transmission. After doing some research, I discovered that I'm not alone in experiencing this issue. The dealer told me that the transmission itself is the problem and recommended replacing the entire transmission. However, a second opinion suggested that this kind of noise isn't normal. I'm worried about safety because, although it's just a whine right now, I fear it could fail unexpectedly. I have a child in a wheelchair, and ensuring my vehicle's safety is very important to me."
Electrical system
The contact owns a 2020 Toyota Sienna. The contact stated that while his wife was driving at an undisclosed speed, the pre collision, lane assist, and air bag warning lights illuminated on the instrument panel. The vehicle was taken to a dealer and a fuse in the ECU (Electronic Control Unit) was replaced; however, the contact stated that approximately 10 days later, the failure recurred. The vehicle was taken back to the dealer where the vehicle remained for almost two weeks. The contact was informed that the wiring harness needed to be replaced; however, the wiring harness was on backorder. The manufacturer was notified of the failure, but no additional assistance was provided. The contact was provided a case number. The vehicle was not repaired. The failure mileage was approximately 60,000.
Odometer Fraud. The contact purchased a 2020 Toyota Sienna. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 88,044. It was later discovered upon checking with the local DMV that the mileage was 288,044.
2020 Toyota Sienna engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 8-speed automatic | FWD | 19 / 26 / 21 |
| 3.5L 6-cyl | 8-speed automatic | AWD | 18 / 24 / 20 |
EPA ratings. Class: Minivan.
Frequently asked questions
Is the 2020 Toyota Sienna a good car?
Based on 38 owner complaints filed with NHTSA, the 2020 Sienna rates better than average: 74% fewer complaints than a typical year of the Sienna at the same age. It is one of the best Sienna years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2020 Toyota Sienna?
The fuel & propulsion system — 8 complaints, 21% of all complaints for this model year. Next are the transmission & drivetrain (8) and electrical system (7).
How many recalls does the 2020 Toyota Sienna have?
There are 2 recalls for the 2020 Toyota Sienna, the most recent from November 4, 2020 (fuel pump). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Toyota Sienna?
The best years by complaints, compared at the same age, are 2020, 2019 and 2018. Years to avoid or approach with caution: 2005, 2006, 2011, 2008 and 2007. See the full Toyota Sienna years comparison.
At what mileage do 2020 Toyota Sienna problems happen?
The median mileage reported in complaints is about 15,000 miles; 82% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.