Sienna (XL40)
NHTSA Safety Ratings About NHTSA ratings
Engine Reliability Ratings
Toyota Sienna Unidentified Engine
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Complaint Breakdown
Known Issues
A25A-FXS, 5NM, 4NM
2.5L 4-cyl / 189 hpView details
Complaint Breakdown
Known Issues
Battery & Propulsion Reliability
Hybrid (HEV)
Battery & propulsion complaint analysis for the 2021-2025 Toyota Sienna
That's below the typical rate for hybrids in this dataset (median 7.5 per year). Battery & propulsion complaints are lower than peer average for this category.
What kind of battery complaint?
Among the 21 battery-related complaints, here's the type mix. These percentages describe what the complaints are about — not how reliable the vehicle is overall.
Hybrid system warnings, eCVT, motor-generator, hybrid transaxle.
Battery fires, smoke, thermal runaway. Includes any complaint with fire reported.
Propulsion battery defects, capacity loss, BMS faults, replacement claims.
Loss of power, drive unit, inverter, traction motor, DC-DC converter.
Low-voltage battery deaths, common on EVs and hybrids that use a 12V for accessories.
Charge port, cable, mobile connector, or session failures.
Sample complaint excerpts
Hybrid Drivetrain
- [2021] 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 whic
- [2021] The contact owned a 2021 Toyota Sienna Hybrid. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. Soon after the malfunctioning hybrid system "pull over immediately warning message displayed. The contact stated while he was driving the vehicle to a nearby parking lot he noticed smoke coming from under the hood. The contact then parked the veh
- [2021] My car became inoperable because Hybrid/EV Battery Voltage System Isolation Fault:Internal electronic failure.Code P0AA6-49..Well known problem to Toyota about corrosive electrical connections(cables)..which needs to be replaced under Hybrid system warranties..but dealership and Toyota refusing to replace it under warranties..even they know some owners started class action against Toyota
Thermal Events
- [2021] The contact owned a 2021 Toyota Sienna Hybrid. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. Soon after the malfunctioning hybrid system "pull over immediately warning message displayed. The contact stated while he was driving the vehicle to a nearby parking lot he noticed smoke coming from under the hood. The contact then parked the veh
- [2021] After being parked for 4 hours the vehicle caught on fire. Burnt passengers rear corner and rear tailgate
- [2021] Van was struck from behind. Van was still moving and was pushed to the left facing opposite direction in other lane. Van caught fire within a minute and became totally engulfed. Van was a total loss. Occupants were able to exit vehicle unharmed. Other car involved was also a total loss but did not catch on fire.
High-Voltage Battery
- [2021] My car became inoperable because Hybrid/EV Battery Voltage System Isolation Fault:Internal electronic failure.Code P0AA6-49..Well known problem to Toyota about corrosive electrical connections(cables)..which needs to be replaced under Hybrid system warranties..but dealership and Toyota refusing to replace it under warranties..even they know some owners started class action against Toyota
- [2022] The complaint was the failure mode of a no start condition while traveling. The issue was related to partial or improper function of the DSM which caused a drain on the battery and battery cell damage requiring full replacement. The fix was a software update to prevent recurrence which cost several hundred dollars (according to the Toyota Service Bulletin or TSB-0089) along with approx $200 for di
- [2022] Over the past 18 months, this vehicle has exhibited the following actions approximately 30-40 times. When slowing the vehicle, with brake pressure applied, the vehicle reacts appropriately until, at the slow speed( approximately 5-10 mph) it suddenly accelerates or surges ahead for approximately 1-2 seconds. The has occurred while in the process of turning as well as moving straight ahead. I have
Electric Propulsion
- [2021] While driving my 2021 Toyota Sienna Hybrid, the vehicle suddenly displayed a low oil pressure warning, immediately lost power, and entered limp mode. I was able to pull over safely, but the engine then suffered a catastrophic failure — a connecting rod blew through the engine block, leaving large metal fragments inside the engine compartment. The vehicle is completely inoperable. Prior to this ev
- [2021] I BELIEVE THE COMPUTER CAUSED THE PROBLEM. THE CAR IS AVAILABLE FOR INSPECTION AS PERSONNEL AT GETTEL TOYOTA IN PUNTA GORDA CLAIMED THEY COULDN'T TOUCH THE COMPUTER AND HAVE DONE NOTHING. Purchased Sienna in August 2021. In October at about 5:30 a.m. we were in the far left lane on a PA interstate, traffic came to a stop for construction. A delivery truck in front of us rolled backward a bit.
12V Auxiliary Battery
- [2022] I my Sienna had its 12 volt battery depleted over night with no reason. After it was jump started, literally every single piece of equipment was malfunctioning and producing an alert (hybrid system, brake pressure, RCTA, BSM, AWD,tire pressure and so on). After several restarts of the engine (about 15 min after running engine), all systems went to normal except hybrid drive system, that still aske
- [2023] The vehicle has a standard installation of a kick sensor for the rear hatch. I purchased the vehicle used and was able to start the vehicle and drive it for a period of time hoping to charge up the 12V battery. However, upon stopping the vehicle I could not restart it. Even after repeated jumpstart and driving the vehicle for over 45 minutes, the 12 V battery could not restart the car. I read abo
Charging System
- [2022] 05/13/23 - Hybrid malfunction, battery consistently dies/won't take a charge. 06/01 - 28/25 - Hybrid malfunction, Advanced Detection System Malfunction and Sonar Malfunction, ABS malfunction, Seatbelt malfunction, battery not charging. 06/09/23 - Van will not start; towed to Steet Toyota. Street confirmed numerous codes, AC issues. 06/27 - 07/06/23 - Van had to be taken to United Access, Albuquer
Source: classified from NHTSA complaint and recall data. "Battery-related" includes high-voltage propulsion battery, charging system, hybrid drivetrain, electric propulsion, regenerative braking, 12V auxiliary battery, and thermal-event complaints. Other complaints (suspension, steering, brakes, infotainment) appear in the engine and vehicle-level sections. Rates are absolute counts, not normalized per-VIN — high-volume models naturally produce more raw complaints than low-volume ones. Self-reported death and injury counts are capped per complaint to limit form abuse.
Vehicle-Level Issues
These issues affect the Toyota Sienna regardless of engine variant.
Recalls (8)
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022-2026 Toyota, Lexus, and Subaru Solterra vehicles equipped with a Panoramic View Monitor (PVM) system. Please see the recall report for a complete list of models. A software error may cause the rearview camera to freeze or display a blank screen when the vehicle is in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
Rollx Vans (Rollx) is recalling certain GMC Yukon, Sierra, Chevrolet Express 2500, Ford Transit, E-250, Toyota Sienna, Sienna Hybrid, Honda Odyssey, Chrysler Town and Country, Voyager, Pacifica, Dodge Grand Caravan, and Ram Promaster vehicles equipped with QRT-Deluxe and QRT-Max wheelchair restraints. Please refer to Rollx's recall report for specific model year information. The retractors may not lock, preventing the wheelchair from being properly secured.
Vantage Mobility, LLC (VM) is recalling certain 2021-2026 Honda Odyssey, 2021-2025 Chrysler Pacifica, and Toyota Sienna vehicles equipped with QRT-Deluxe and QRT-Max wheelchair restraints. The retractors may not lock, preventing the wheelchair from being properly secured.
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2025 Sienna Hybrid vehicles. The bolts for the seatbacks on the third-row seat assemblies may not be tightened properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 202, "Head Restraints," 207, "Seating Systems," and 225, "Child Restraint Anchorage Systems."
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2025 Sienna Hybrid vehicles. The second-row seat rails may be welded improperly.
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2021 Avalon, Avalon Hybrid, Corolla, Highlander, Highlander Hybrid, RAV4, RAV4 Hybrid, Lexus ES350, Lexus RX350, Lexus RX450H, 2021 Sienna Hybrid, Lexus ES250, 2020-2022 Camry, Camry Hybrid, and ES300H vehicles. A short circuit may develop in the Occupant Classification System (OCS) sensor, preventing the front passenger air bag from deploying.
Toyota Engineering & Manufacturing (Toyota) is recalling certain 2022 Lexus LX 600, Lexus NX 350h, Lexus NX 450h+, Toytoa RAV4 Hybrid, 2021-2022 Lexus LS 500h, Toyota Mirai, RAV4 PRIME, Sienna, Venza, and 2020-2022 Toyota Highlander Hybrid vehicles. The Skid Control ECU software may not turn on the Vehicle Stability Control (VSC) system when the vehicle is restarted after the driver has disabled the VSC system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 126, "Electronic Stability Control Systems."
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022 Sienna vehicles equipped with seating for eight passengers. An incorrect seat belt webbing guide may have been installed on the outboard second-row seat belt assemblies.
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Frequently Asked Questions
What are the most common 2021-2025 Toyota Sienna problems?
The 2021-2025 Toyota Sienna has accumulated 631 NHTSA complaints. The most frequently reported problem areas are Interior, Brakes, Safety Systems. As with any used vehicle, an inspection before buying and a vehicle history report are recommended.
Which Toyota Sienna engine is most reliable?
The 2021-2025 Toyota Sienna was offered with 2 engine options. Based on NHTSA complaint data, the 2.5L 4-cyl has the lowest complaint density and is considered the most reliable choice for buyers.
Is the 2021-2025 Toyota Sienna a good used car?
The 2021-2025 Toyota Sienna can be a sound used car depending on trim, mileage, and maintenance history. With 631 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.
How many NHTSA complaints does the 2021-2025 Toyota Sienna have?
The 2021-2025 Toyota Sienna has 631 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.
What recalls affect the 2021-2025 Toyota Sienna?
There are 8 NHTSA recalls affecting some 2021-2025 Toyota Sienna vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.
What should I check before buying a used Toyota Sienna?
Before buying a used Toyota Sienna, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Interior, Brakes, Safety Systems, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.
What are the NHTSA crash test ratings for the Sienna?
The 2025 Toyota Sienna received an overall 5-star safety rating from NHTSA. Frontal crash: 4 stars. Side crash: 5 stars. Rollover: 4 stars (12.7% rollover probability). Electronic Stability Control: Standard. Forward Collision Warning: Standard. Lane Departure Warning: Standard. These ratings are based on standardized crash tests conducted by the National Highway Traffic Safety Administration.
Data from NHTSA federal complaints database. 631 complaints analyzed. Data confidence: high. Last updated: 2026-05-23.