Complaint volume
35 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2020 Toyota Sienna Complaints
35 consumer-submitted complaints on record for the 2020 Toyota Sienna, grouped by component category.
35 Total complaints
0 Crash reports
1 Fire reports
0 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are power train, fuel/propulsion system, unknown or other. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 0 crash reports, 1 fire report, 0 injury reports, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 10 complaints, with an average reported failure mileage of 17,631 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to power train, fuel/propulsion system, unknown or other?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2020 Toyota Sienna?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2020 Toyota Sienna
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2020 Toyota Sienna complaints?
0 Crash
1 Fire
0 Injury
0 Fatality
0 Towed
0 Medical attention
What are the most common 2020 Toyota Sienna complaint categories?
POWER TRAIN 5
FUEL/PROPULSION SYSTEM 4
UNKNOWN OR OTHER 4
ELECTRICAL SYSTEM 3
STRUCTURE 3
FUEL SYSTEM, GASOLINE 2
STEERING 2
ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES 1
ENGINE 1
POWER TRAIN,ELECTRICAL SYSTEM,ENGINE 1
35 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| May 2026 | POWER TRAIN | My Toyota sienna is a 2020, has 83,000 miles and has recently been squealing when I accelerate. I took the van to a local body shop and they said it seems to be my transmission. I called Toyota immediately and they knew that the transmissions were faulty and that they would try to work with Toyota to get it fixed. There is no way I can pay 9k for a new transmissions because they put in faulty ones. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | 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 believe this vehicle may have the same defective component as those included in the recall, even though it is not currently listed. The issue has been confirmed by an independent mechanic and the vehicle is available for inspection if needed. | Crash: No Fire: No | Unknown |
| Apr 2026 | UNKNOWN OR OTHER | cable broke on sliding door and unable to open or access cabin on that side. turned off power to door and still unable to force door open making it difficult to unlatch car seat on that side. safety hazard in accident or rollover | Crash: No Fire: No | Unknown |
| Oct 2025 | STRUCTURE | The power sliding door assembly failed, and the driver side rear sliding door was bound shut, and could not be opened. Disabling the power door system did not resolve the issue. The cable for the power door mechanism was hanging below the rear vent windows; but for some reason the door still would not open. I ultimately with a lot of gentle force was able to get the door open enough to see the retract side of the cable was bound up, and was able to cut it with wire cutters, and ultimately get the door to work normally as a non-powered manual sliding door. Since the original NHTSA BULLITIN on this was published in 6/2019 before my 2020 Sienna was manufactured, and Toyota did not change the mechanism until the 2021 model redesign, I believe that RECALL should be extend to all 2019 and 2020 vehicles. This seems dangerous that the door does not default to manual operation in error. | Crash: No Fire: No | Unknown |
| Aug 2025 | POWER TRAIN | "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." | Crash: No Fire: No | Unknown |
| Aug 2025 | POWER TRAIN | A catastrophic failed automatic transmission; UA80E of Toyota Sienna 2020 at 85,000 miles. It occurred while I've been driving downhill. No warning lights, not overheating, no diagnostic ODB code, no other indications prior to the failure. Failure created a substantial safety risk for myself, my four passengers and other road users. Sudden loss of transmission function could lead to potential dangerous situation. Minivan was towed to the nearest Toyota dealer where transmission assembly was confirmed for replacement. | Crash: No Fire: No | Unknown |
| Jul 2025 | VISIBILITY | In August of 2024, we noticed the drivers side rear view mirror had come loose from it's external housing and was only tethered by wiring that was for mirror movement, defrosting and blind spot awareness. In order for it to be safe to use, we had to duct tape it so that it would not move. Unfortunately, the mirror continues to loosen and has to be retaped frequently. We took it to our dealer (McGovern Toyota) in Portsmouth, NH 0n 23 September 2024 and were told that it could not be fixed but had to be replaced and were quoted an amount of $2025.29 .We were also told that the part was on national backorder and may take a few weeks to arrive. Due to the astonomical cost of replacement, I tried to find other solutions and contacted other dealers and body shops but was told it had to be replaced and could not be fixed. I brought the car into another dealer, nearby (Ira Toyota) in Saco, Maine and they also said it had to be replaced and quoted an amount of $1937.70.I asked them to order the part, which they too, said was in national backorder. I contacted our automobile insurance company (AMICA) who agreed to cover the part and labor and issued a check for $1,420.60. Every month, I would call the dealer and every month I was told that Toyota estimated a delivery within a month, but that month would come and go with no part. For the last several months, I have been in touch with TOYOTA and their "brand engagement advocate" named Julie has reviewed our concern and also has stated that the part will be available by the end of the months of February, March, April, May, June and now July. I have written emails to TOYOTA expressing my dissatisfaction and now have a vehicle which is unsafe to drive due to the instability of the mirror and a vehicle which will not pass inspection (according to the dealer). I feel TOYOTA is lying about the parts actual availability and being disingenuous to what was a loyal customer. I am at a loss what to do next. | Crash: No Fire: No | Unknown |
| Nov 2024 | 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. | Crash: No Fire: No | 60,000 |
| Aug 2024 | STRUCTURE | Hinge rust on fuel door causing it to break and not let rear passenger door auto open (because switch won't make up) hinge is very weakly built | Crash: No Fire: No | Unknown |
| Jul 2024 | UNKNOWN OR OTHER | Sun roof leaking or clogging causing water to get inside vehicle. Causing extensive damages and malfunctions | Crash: No Fire: No | Unknown |
| Apr 2024 | ELECTRICAL SYSTEM | Spontaneous and random: Blinkers come on, radio volume goes up or down when turning the other way, CarPlay USB shuts off and on, hiccups when accelerating (when ECO kicks on/in)…everything points to an electrical/computer issue. Purchased used from a dealership and noticed these issues after the 3-day return window. | Crash: No Fire: No | Unknown |
| Apr 2024 | ELECTRICAL SYSTEM | Speakers make an ear piercing loud noise that lasts about a second. If this sound were to occur during travel, could cause distraction leading to harm, or with young kids in the car, possibly damage their ears. This problem has been random and not experienced by a dealership. No warning messages or symptoms to the problem. Problem first appeared 6 months ago. | Crash: No Fire: No | Unknown |
| Jan 2024 | STRUCTURE | The passenger side rear door unlocked and opened by itself in the middle of the night, no warning messages were given previously, doors were locked that night. Keys were not accidentally pressed on. It seems that others have had similar problems with Toyota Siennas in the past as well. | Crash: No Fire: No | Unknown |
| Sep 2023 | STEERING | The contact owns a 2020 Toyota Sienna. The contact stated while driving at various speeds, the vehicle lost power steering assist. Additionally, the "Check Vehicle Stability Control System", "Pre-Collision System Malfunction", and "Lane Departure Alert" messages were displayed. The vehicle was initially taken to an independent mechanic where the rack and pinion was replaced; however, the failure persisted. The dealer was then notified of the failure and informed the contact that there were no open recalls on the VIN. Upon investigation, the contact discovered NHTSA Campaign Number: 19V532000 (Steering) which he linked to the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was unknown. | Crash: No Fire: No | Unknown |
| Aug 2023 | SERVICE BRAKES | The brake peddle is too small, it feels like my foot is going to come off of it or miss it. Some time's I lose a second or two trying to locate it with my foot, very frightening, and dangerous Every vehicle I have ever owned had a brake peddle twice that size. Yes it's a mini van, but the brake peddle does not need to be mini. This vehicle can carry 8 adults with lots of extra room, it should not even be classified a mini van. The brake peddle is less then 4 inches wide. Please look into this dangerous issue. Photos attached. | Crash: No Fire: No | Unknown |
| Aug 2023 | UNKNOWN OR OTHER | I came to sellers home to look at his van. His ad said mileage was 77k and odometer also read 77k. When I ran the Carfax, I noticed CA DMV registered title at 143k. Seller admitted to replacing dashboard when confronted. Address of seller is [XXX] . I don't have a name. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Jul 2023 | SERVICE BRAKES, AIR | The contact owns a 2020 Toyota Sienna. The contact stated while driving approximately 15 MPH and making a turn, the brake pedal was depressed, and the vehicle skidded. The ABS warning light was illuminated. There was an abnormal sound coming from the vehicle. The vehicle was taken to the local dealer, where it was diagnosed that there was a speed sensor short circuit on the front passenger’s side, and that the brake actuator was fractured. The vehicle was not repaired due to parts not being available. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 28,000. The VIN was not available. | Crash: No Fire: No | 28,000 |
| Jul 2023 | POWER TRAIN | My car was not shifting gears, and it would go into brief periods of erratic acceleration. I took it to the dealer service dept. The transmission went bad. It had metal pieces broken off inside it. The car is 3 years old and only has approximately 70,900 miles on it. It was dangerous to drive. It put me, my kids, and other drivers at risk due to the erratic shifting it would do while driving. The issues started slowly on 6/23/23. The check engine light was on by 6/24/23. | Crash: No Fire: No | Unknown |
| Sep 2022 | POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | For a month prior, there were intermittent incidents of the van shuddering and the RPM needle jumping upon ignition. Sometimes the van would have a hard time accelerating before jerking and driving normally. No issues before this started in late July and no indication when/where would occur. •September 15: drove the van all day running errands. It drove normally. Filled up the gas tank (Gulf gas station), then continued errands. About a half hour later, while at a stop sign, a notification appeared that the “Traction Control System has been turned off” and the check engine light came on. Tried to move through the stop sign, but the van would barely go. Applied the gas, but no results. Able to turn onto a side street and had to have it towed to Toyota of Irving. The Service Advisor stated the issue was due due to bad gas and indicated the van needed to be flushed and the fuel injection system cleaned. Paid $725 for these repairs. •September 17: Started van in driveway. Shuddering and RPM needle jumping again. Drove normally. •September 21: Same as above. •September 25: Drove the van all day with no issues. Filled up with Valero Plus gas. As we pulled out of the gas station and sitting at the light, the Traction Control message and check engine light again appeared. The van would barely go to get us through the traffic light and into a nearby parking lot. Once we parked, the screen displayed the following message:"A malfunction in the electronic control of the engine, throttle, or automatic transmission has been detected." Had the vehicle towed to Toyota of Irving. The service advisor called 2 days later to say they cannot detect any issues. | Crash: No Fire: No | Unknown |
| Sep 2022 | FUEL/PROPULSION SYSTEM | The van has been periodically hesitating, rough idles, and when parked the rpm revs. On 9/13/22, the van was shaking, hesitating, and would not accelerate. It was undrivable and had to be towed. We took it to Toyota of Irving where they charged us $725 to flush the gas and clean the fuel injection system. Despite this, it is still hard idling and hesitating. | Crash: No Fire: No | Unknown |
| May 2022 | FUEL SYSTEM, GASOLINE | 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. | Crash: No Fire: No | 10,000 |
| Mar 2022 | ENGINE | 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. Symptoms occurred again 6/2/22: Starting from full stop (engine was idling normally), gave it partial throttle whereupon engine stumbled (died very briefly), Master Warning Light lit briefly, all power was lost. Consumer applied additional throttle, engine stumbled then began running normally and warning light extinguished. Remainder of trip was normal. Vehicle was taken to local dealer after first incident but dealer reported no issues were found. | Crash: No Fire: No | Unknown |
| Oct 2021 | UNKNOWN OR OTHER | Jack provided with vehicle failed during change of tire. | Crash: No Fire: No | Unknown |
| Jul 2021 | POWER TRAIN,ENGINE | 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. | Crash: No Fire: No | Unknown |
| Jun 2021 | UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM | 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. | Crash: No Fire: Yes | Unknown |