2018 Toyota Sienna problems, complaints & recalls
Most-reported problem areas: Power Train (16) · Fuel/Propulsion System (7) · Vehicle Speed Control (5)
🧭 Reliability snapshot
Compared against other Toyota Sienna model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
38 NHTSA complaints that reported an odometer reading.
Safety recalls (7)
Fuel System, Gasoline:delivery:fuel Pump 2020-11-04 · campaign 20V682000 · 1,525,742 vehicles
Defect: Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 4Runner, 2019-2020 Avalon, 2019 Corolla Hatchback, 2017-2019 Highlander, 2018-2020 Camry, 2020 Corolla, 2018-2019 Land Cruiser, 2017-2020 Tacoma, 2019-2020 RAV4, 2019-2020 Sequoia, 2017-2020 Sienna, 2019-2020 Tundra, 2018-2020 Lexus ES350, 2017 Lexus GS200t, 2017-2019 Lexus GS350, 2019 Lexus GS300, 2018-2020 Lexus LC500h, 2019-2020 Lexus LS500, 2018-2019 Lexus GX460, 2017 Lexus IS200t, 2019 Lexus IS300, 2019 Lexus I
Risk: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Fix: Toyota will notify owners, and dealers will replace the fuel pump assembly with an improved one, free of charge. Owners of specific models were notified that remedy parts were available starting January 21, 2021. Owners of other models will be notified as remedy parts become available. Remedy parts should be available for all affected vehicles by late March 2021. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Note: This recall is an
Fuel System, Gasoline:delivery:fuel Pump 2020-01-13 · campaign 20V012000 · 1,830,752 vehicles
Defect: Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 4Runner, Highlander, Camry, Land Cruiser, Sequoia, Sienna, Tacoma and Tundra, and Lexus RC 300, RC 350, GS 350, GX 460, IS 300, LC 500, LS 500, LX 570, RX 350L, and 2019 Toyota Avalon and Corolla, and certain Lexus NX 300, and ES 350 vehicles on January 13, 2020. On March 4, 2020, Toyota expanded the recall to include certain 2014-2015 Toyota 4Runner and Land Cruiser, 2018 Avalon, Corolla, 2014 FJ Cruiser, 2017 Sienna
Risk: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Fix: Toyota will notify owners, and dealers will replace the fuel pump, free of charge. The recall began May 4, 2020. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Toyota's numbers for this recall are 20TB02 and 20TA02 for Toyota vehicles and 20LB01 and 20LA01 for Lexus vehicles.
Service Brakes, Hydraulic:foundation Components:hoses, Lines/Piping, And Fittings 2019-07-25 · campaign 19V553000 · 303 vehicles
Defect: Vantage Mobility International, LLC (Vantage) is recalling certain 2012-2018 AMS Genesis wheelchair vans, built on a Toyota Sienna vehicles. The rubber brake hoses that attach to the rear wheel assembly may be too short, causing them to rub against the rear axle trailing arm.
Risk: The contact may cause failure of the rear brake hoses, resulting in a loss of vehicle control and reduced braking ability, increasing the risk of a crash.
Fix: Vantage will notify owners, and dealers will install a set of rear brake hoses that will provide the proper clearance, free of charge. The recall began December 16, 2019. Owners may contact Vantage customer service at 1-800-488-9082.
Steering 2019-07-16 · campaign 19V532000 · 595 vehicles
Defect: Braun Corporation (Braun) is recalling certain modified 2017-2020 Toyota Sienna vehicles. The steering shaft extensions may have been improperly manufactured, possibly causing the extensions to fracture.
Risk: If the steering shaft extension completely fractures, it can cause a loss of steering, increasing the risk of a crash.
Fix: Braun has notified owners, and dealers will replace the steering shaft extensions, free of charge. The recall began July 25, 2019. Owners may contact Braun customer service at 1-800-488-0359.
Equipment:other:labels 2019-06-28 · campaign 19V503000 · 1,325 vehicles
Defect: Southeast Toyota Distributors, LLC (SET) is recalling certain 2017-2019 Toyota Camry, Corolla, Rav4, Sienna, and Yaris iA vehicles equipped with factory-installed floor mats. The load carrying capacity modification label may be incorrect. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."
Risk: An incorrect label may lead to unintentionally overloading the vehicle, increasing the risk of a crash.
Fix: SET will notify owners and provide a corrected label for placement over the inaccurate label, free of charge. The recall began August 23, 2019. Owners may contact Toyota customer service at 1-888-270-9371. SET's number for this recall is SET19A.
Service Brakes, Hydraulic:foundation Components:hoses, Lines/Piping, And Fittings 2019-06-04 · campaign 19V410000 · 705 vehicles
Defect: Braun Corporation (Braun) is recalling certain 2014-2019 Toyota Sienna mobility van conversions. The brake lines may have incorrect tube nut fittings installed, which may cause a pressure drop within the braking system.
Risk: The reduction in the braking system pressure may cause a loss of braking power in the rear braking system, increasing the risk of crash.
Fix: Braun has notified owners, and dealers will install an adaptor to correct the issue, free of charge. The recall began June 25, 2019. Owners may contact Braun customer service at 1-800-488-0359.
Wheels 2018-02-22 · campaign 18V130000 · 55 vehicles
Defect: Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018 Toyota Sienna vehicles built with a specific lot of 10-spoke alloy wheels from one production facility. These wheels may not have been properly cooled during manufacturing. As a result, the wheels may crack in the spokes from an impact while driving.
Risk: If the wheels crack at the spokes, the wheel may separate from the hub assembly causing a loss of vehicle control and increasing the risk of a crash.
Fix: Toyota began notifying owners initially by phone on February 26, 2018 and will mail letters to any unnotified owner starting on April 20, 2018. Dealers will inspect the wheels and replace them if necessary depending on their production location, free of charge. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's number for this recall is J0J.
Service bulletins (300)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Electrical System 2026-01-30 · T-SB-0106-22 Rev2 · Service Bulletin/Repair Instructions
obsolete notice january 30, 2026: this bulletin is now obsolete. please see t-sb-0001-26.
Electrical System 2026-01-28 · T-SB-0001-26 · Service Bulletin/Repair Instructions
some 2018 – 2024 model year toyota vehicles equipped with a premium audio with dynamic navigation system require a special service tool (sst) usb flash drive to update the map, points of interest, and system software.
Unknown Or Other 2026-01-07 · T-SB-0055-24 Rev2 · Service Bulletin/Repair Instructions
some 2005 – 2026 toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. follow the procedures in this bulletin to remediate the odor and address this condition. the purpose of this service bulletin is to provide general guidelines and procedures
Electrical System 2025-08-20 · T-TT-0790-25 · Service Bulletin/Repair Instructions
some customers may experience echoing on the line calling the vehicle when using bluetooth hands free. this is caused by the phone hands free volume being too low.
Electrical System 2025-06-13 · T-SB-0058-23 Rev1 · Service Campaign
the air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. the procedures outlined in this service bulletin aid in locating, inspecting, and repairing refrigerant leaks.
Electrical System 2025-04-02 · T-TT-0780-25 · Service Bulletin/Repair Instructions
to assist with the early detection and early resolution of audio related concerns you may be asked to recover mmr data from the head unit. the following steps are instructions on how to retrieve the data from the system and are only to be used when requested by fts and/or fpe.
Showing the 6 most recent of 300 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-09-22 · Power Train“whining noise when accelerating, transmission shop reported discovery of damage to transmission upon removal and inspection of transmission.…”
2026-09-17 · Power Train“transmission whining above 20mph. toyota customer care program [xxx] states my vehicle falls within timeframe but dealer and corporate will not honor repairs information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)…”
2026-09-02 · Electrical System:instrument Panel:speedometer/Odometer · 324,000 mi“odometer fraud. the contact purchased a 2018 toyota sienna. it was discovered that there was a mileage discrepancy. the vehicle was a private sale. at the time of purchase, the mileage was 49,000. while attempting to resell the vehicle, the auto check report indicated that the mileage was 324,000.…”
2026-07-14 · Power Train“vehicle: 2018 toyota sienna xle awd, vin [xxx], approximately 112,000 miles. component: power train / automatic transmission (ua80f 8-speed). the vehicle has developed a pronounced whining noise from the transmission that rises with road speed, accompanied by harsh/rough shifting. a toyota dealer inspected the vehicle and diagnosed a failing trans…”
2026-06-21 · Power Train“since owning my 2018 toyota sienna, i have experienced hesitation and erratic shifting with my transmission. i have the ua80e transmission which upon research others are experiencing issues with as well. it appears toyota is not fully acknowledging the problem. the problem is a safety issue as sometimes when you go to quickly accelerate (merging, m…”
2026-02-23 · Power Train“my 2018 sienna had developed a whining noise when accelerating. after taking it in to the mechanic, they advised the transmission was failing. estimated price tag of $6500-7000 to repair. the vehicle has less than 140k miles. looking at different issues with this make/model and year, it seems like its rather common. i bought a toyota for its …”
2026-02-02 · Power Train · 126,000 mi“the contact owns a 2018 toyota sienna. the contact stated that while driving 30 mph and ascending a hill, the vehicle started making an abnormal whining sound and hesitated while accelerating. the vehicle was driven to the dealer to be diagnosed. the vehicle was diagnosed with transmission failure. the manufacturer was notified of the failure. the …”
2026-01-16 · Power Train“transmission has been whining. a p27137f code appeared and the vehicle is only in 2wd mode currently. concerned to drive vehicle due to further damaging transmission or getting stuck while on the road. …”
2026-01-02 · Power Train“my husband and i bought this van brand new 6 years ago. we have taken very good care of it and have had it serviced only at the dealership. we haven’t had any problem with the van outside of regular maintenance. on 10/29/25, i had a van full of children when i felt a slip in my acceleration and a warning light came on that read, “ a malfunction in …”
2025-08-04 · Power Train“transmission whine and hesitation. low gear it will hesitate from stop. know issue with this transmission. there should be a recall on all ua80 transmissions.…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.