2020 Toyota Sienna Engine Problems
- Complaints
- 6about this part
- Share
- 16%of 38 total for the year
- Median mileage
- 2,644miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the engine of the 2020 Toyota Sienna, 16% of the 38 complaints for this model year. Where a mileage was given, the median is 2,644 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While driving on hwy, suddenly engine light came on. Also I lost acceleration. When I press gas pedal no response from car. Vehicle was slowing down so pulled into gas station. When I stopped the car, engine light was still on, traction light came on and steering system light came on. Also engine light was solid and it was not flashing”
NHTSA complaint #11329923, filed 2020-06, 2,644 miles“Car has about 16,000 miles. When accelerating slowly from a stop, vehicle hesitates, shakes, and runs rough as it slowly progresses thru first, second, & third gears. After transmission gets in fourth gear, hesitation and roughness goes away. This issue is rapidly getting worse.”
NHTSA complaint #11425334, filed 2021-07“Engine stalled in heavy traffic after full stop at red light. No warning lights. Managed to pull off the road. Still no warning lights. Turned engine off then started normally. Drove to destination normally. After about one hour parked started engine but it stumbled on and off for the next few minutes but did not die. Has not reoccurred. Outside temps were in the 60's. It was first trip of the day. Incident occurred about 4 miles from origin. …”
NHTSA complaint #11457450, filed 2022-03“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.”
NHTSA complaint #11420552, filed 2021-06“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. …”
NHTSA complaint #11733827, filed 2026-04Related service bulletins
- 11005119Jun 19, 2024This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
- 11005061Jun 19, 2024This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
- 10210370Mar 8, 2022TT: Some 2017-2022 Highlander, and 2017-2020 Sienna vehicles may experience an engine oil leak condition from the No.2 Oil pan. This issue is currently under investigation…
- 10179702Aug 7, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10179606Aug 7, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10177592Jun 12, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10177575Jun 1, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 5 | 4% |
| 2021 | 8 | 5% |
| 2020 | 6 | 16% |
| 2019 | 4 | 9% |
| 2018 | 5 | 7% |
| 2017 | 15 | 10% |
| 2016 | 4 | 5% |
| 2015 | 16 | 7% |
| 2014 | 11 | 7% |
| 2013 | 7 | 4% |
| 2012 | 9 | 4% |
| 2011 | 23 | 4% |
| 2010 | 5 | 3% |
| 2009 | 10 | 5% |
| 2008 | 39 | 9% |
| 2007 | 42 | 12% |
| 2006 | 11 | 1% |
| 2005 | 22 | 2% |
| 2004 | 13 | 1% |
| 2002 | 3 | 2% |
| 2001 | 2 | 1% |
| 2000 | 2 | 1% |
| 1998 | 1 | 0% |
Other parts of the 2020 Toyota Sienna
8 complaintsTransmission and drivetrain
8 complaintsElectrical system
7 complaintsOther or unknown
6 complaintsBody and structure
4 complaintsBrakes
3 complaintsSteering
3 complaintsAir bags
1 complaintsElectronic stability control
1 complaintsSeats
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaintsWheels
1 complaints
← All problems reported for the 2020 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology