2020 Toyota SIENNA problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
38 owner complaints analyzed
2 distinct recall campaigns
14,571 mi median reported failure mileage
Scope: 2020 model year. Data snapshot: . 11 complaints include usable failure mileage.
Most common problems
Power Train is the most frequently named component, appearing in 8 of 38 complaints (21.1%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Transmission and shifting | 6 | 15.8% |
| Fuel system concerns | 6 | 15.8% |
| Electrical and battery issues | 4 | 10.5% |
| Engine operation | 3 | 7.9% |
| Braking behavior | 3 | 7.9% |
| Steering behavior | 3 | 7.9% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Power Train | 8 |
| Electrical System | 6 |
| Engine | 6 |
| Fuel/Propulsion System | 6 |
| Unknown Or Other | 6 |
| Structure:Body | 4 |
| Steering | 3 |
| Fuel System, Gasoline | 2 |
Power Train: 8; Electrical System: 6; Engine: 6; Fuel/Propulsion System: 6; Unknown Or Other: 6; Structure:Body: 4; Steering: 3; Fuel System, Gasoline: 2
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 7 |
| 25,000 to 49,999 | 2 |
| 50,000 to 74,999 | 1 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 1 |
Under 25,000: 7; 25,000 to 49,999: 2; 50,000 to 74,999: 1; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 1
Under 25,000 miles has the most reports with usable mileage (7). 27 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2019 | 1 |
| 2020 | 4 |
| 2021 | 8 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 6 |
2019: 1; 2020: 4; 2021: 8; 2022: 4; 2023: 5; 2024: 6; 2025: 4; 2026: 6
Pattern summary
Power Train leads the component reports. Transmission and shifting appears in 6 complaint narratives. Fuel system concerns appears in 6 complaint narratives. Electrical and battery issues appears in 4 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11425334 · 2021-07-18 (July 18, 2021)
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.
Owner-reported narrative. Look up ODI 11425334 at NHTSA ↗
Owner report 11486860 · 2022-09-28 (September 28, 2022)
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 tur…
Owner-reported narrative. Look up ODI 11486860 at NHTSA ↗
Owner report 11403299 · 2021-03-16 (March 16, 2021)
THIS VEHICLE IS OWNED BY EMORY UNIVERSITY. EMORY UNIVERSITY WAS NOTIFIED LAST YEAR (OCTOBER) THAT THE LOW PRESSURE FUEL PUMP MAY STOP OPERATING. TO DATE, THERE HAS BEEN NO REPAIR OFFERED BY TOYOTA. 2020 TOYOTA SIENNA AS SUCH EMORY UNIVERSITY WILL NOT LET US OPERATE IT UNTIL IT HAS BEEN REPAIRED. NEARLY SIX MONTHS LATER, NO REPAIR.
Owner-reported narrative. Look up ODI 11403299 at NHTSA ↗
Owner report 11405145 · 2021-03-27 (March 27, 2021)
THE FUEL PUMP NEEDS REPLACED AND HAS BEEN RECALLED. THE RECALL CAN CAUSE AN INCREASED RISK OF A CRASH. WE STILL HAVEN'T HAD THIS REPLACED IN A TIMELY MANNER AND IT'S NOT SAFE FOR MY SMALL CHILDREN.
Owner-reported narrative. 20,000 miles reported. Look up ODI 11405145 at NHTSA ↗
Owner report 11535008 · 2023-07-28 (July 28, 2023)
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 failur…
Owner-reported narrative. 28,000 miles reported. Look up ODI 11535008 at NHTSA ↗
Owner report 11581325 · 2024-04-05 (April 5, 2024)
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.
Owner-reported narrative. Look up ODI 11581325 at NHTSA ↗
Owner report 11457450 · 2022-03-19 (March 19, 2022)
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…
Owner-reported narrative. Look up ODI 11457450 at NHTSA ↗
Owner report 11465471 · 2022-05-20 (May 20, 2022)
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 deale…
Owner-reported narrative. 10,000 miles reported. Look up ODI 11465471 at NHTSA ↗
Owner report 11268737 · 2019-10-15 (October 15, 2019)
DEAR TO WHO CONCERN THIS CASE, ON AUGUST 26, 2019, I PURCHASED A BRAND NEW CAR, SIENNA, TOYOTA 2020 FROM PRINCIPLE TOYOTA ON 7370 WINCHESTER RD, MEMPHIS, TENNESSEE 38125. I DISCOVERED THAT THERE ARE MAJOR ISSUES WITH THE CAR. I WAS GUARANTEED BY THE DEALER THAT THE CAR IS IN PERFECT WORKING CONDITION BEFORE PURCHASE. HOWEVER, AFTER DRIVING THE NEW CAR FOR FEW DAYS, THE KEY REMOTE STOPPED WORKING AND I REVISITED THE DEALERSHIP TO GET IT FIXED. I TALKED TO JIMMY ROCKER, ONE OF THE SALE ASSOCIATES, AND HE TRANSFERRED ME TO THE TOYOTA SERVICE…
Owner-reported narrative. Look up ODI 11268737 at NHTSA ↗
Owner report 11329923 · 2020-06-21 (June 21, 2020)
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
Owner-reported narrative. 2,644 miles reported. Look up ODI 11329923 at NHTSA ↗
Owner report 11406711 · 2021-04-06 (April 6, 2021)
TL* THE CONTACT OWNS A 2020 TOYOTA SIENNA. THE CONTACT STATED WHILE DRIVING 55 MPH, THE STEERING WHEEL WAS DIFFICULT TO STEER. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO A LOCAL DEALER OR AN INDEPENDENT MECHANIC TO BE DIAGNOSED OR REPAIRED. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 6,200.
Owner-reported narrative. 6,200 miles reported. Look up ODI 11406711 at NHTSA ↗