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Fuel systemPart report

2021 Toyota Sienna Fuel system Problems

Complaints
5about this part
Share
3%of 165 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the fuel system of the 2021 Toyota Sienna, 3% of the 165 complaints for this model year.

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.

“sound coming from engine / transmission other issues with the 2 ruber seals on the minivan keep worping out i looked on all the forms everyone is making the same complaint i toook it to toyota they just put tape and its off again they didnt help for a perminent fix back door is miss alined pasanger side sliding door sometimes does not close takes 3-4 atempts pressing the button”

NHTSA complaint #11675599, filed 2025-07

“About 25% of the time when I come to a stop and I am breaking, the car surges forward slightly. At first, I thought it was the way I was driving or the fact that it is an EV vehicle, which I had not driven before, but overtime it seems it is just the way the car operates. Others in the car have felt it happen as well as I have come to a stop sign or stoplight. I have not bumped into another car or anything but feel that that could happen if this is not corrected.”

NHTSA complaint #11578332, filed 2024-03

“I was driving my Toyota Sienna on a busy 6 lane highway in the second to the left lane, on a bridge. Suddenly without any warning AT ALL, my vehicle lost all power and came to an abrupt halt in the middle of high speed traffic. My wife and children were all in the car and we were in imminent danger of getting hit by another vehicle. It took the police approximately 10 minutes to arrive during which we were in life threatening danger. After the vehicle stopped a message on the dashboard read Hybrid System Failure. …”

NHTSA complaint #11715113, filed 2026-02

“There has been several incidents when I step on the brakes and the vehicle seems to accelerate forward after what feels like an attempt to find the right gear when decelerating. This occurs infrequently but usually when decelerating along with an external factor. I was able to consistently replicate when I’m coming off the highway onto a service road then have to make quick turn at a corner. It feels as if the vehicle is trying to search for a gear and once it finds it there’s a momentarily acceleration forward.”

NHTSA complaint #11590055, filed 2024-05

“Check engine light came on - Taken to dealer, diagnosed following 2 codes : P24517F and P14502A Both of these codes are known problems to Toyota, and as such a Service buliten for the Evap Emission System Switch Valve has been issued per NHTSA. This problem should be a recall, not a known service issue - it is obviously a common problem with Toyota in the Hybrid engines.”

NHTSA complaint #11593126, filed 2024-06

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
202254%
202153%
2020821%
20191328%
20181318%
20171711%
201611%
201573%
2014127%
201363%
201252%
201191%
201021%
200931%
2008123%
200792%
200661%
200581%
2004492%
200344%
200253%
2001137%
200051%
199963%
199821%

Other parts of the 2021 Toyota Sienna

Brakes
80 complaints
Other or unknown
29 complaints
Seats
17 complaints
Air bags
16 complaints
Electrical system
13 complaints
Vehicle speed control
10 complaints
Engine
8 complaints
Seat belts
8 complaints
Transmission and drivetrain
8 complaints
Body and structure
6 complaints
Visibility (wipers, defrost, mirrors)
6 complaints
Forward collision avoidance
5 complaints

← All problems reported for the 2021 Toyota Sienna

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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