Most common 2018 Toyota Sienna problems
Share of the 72 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Toyota Sienna complaints by model year
Best Sienna years: 2020, 2019, 2018. Years to avoid: 2005, 2006, 2011, 2008, 2007. Compare all years →
2018 Toyota Sienna recalls (7)
Fuel system, gasoline › Delivery › Fuel pump
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…
Remedy: 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.
Fuel system, gasoline › Delivery › Fuel pump
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…
Remedy: 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.
Service brakes, hydraulic › Foundation components › Hoses, lines/piping, and fittings
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.
Remedy: 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.
Steering
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.
Remedy: 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
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.
Remedy: 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.
Service brakes, hydraulic › Foundation components › Hoses, lines/piping, and fittings
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.
Remedy: 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.
Show 1 more recall
Wheels
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.
Remedy: Toyota began notifying owners initially by phone on February 26, 2018 and will mail letters to any unnotified owner starting on April 20, 2018.
What 2018 Toyota Sienna owners say
Transmission & drivetrain all 20 →
The contact owns a 2018 Toyota Sienna. The contact stated while driving at an undisclosed speed, the vehicle hesitated while accelerating. Several unknown warning lights were illuminated. Additionally, the "Pull Over - Take to Dealer" message was displayed. The vehicle was taken to the dealer, where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not included in Customer Support Program: ZJC (Coverage for UA80 Transmission). The failure mileage was approximately 132,000.
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 failure mileage was approximately 126,000.
Fuel & propulsion system
Hi, I'd like to report a serious issue with my 2018 Toyota Sienna related to the recent fuel system recall. Since the repair, the vehicle has leaked all of its gasoline not once, but three separate times. One of those times, my family was inside the vehicle, and the smell of gas was overwhelming. The car wouldn't start, and it was clearly an unsafe situation. Now the dealership is charging me $1,400 to replace the fuel pressure hose and clamp, which, after thorough research and review, appears to be directly related to the process they followed when replacing the recalled fuel pump. I've also tried contacting the service manager, but I haven't received a call back. That's why I'm now requesting that Toyota open a formal case to investigate this properly. I believe this repair should be covered, and I'm asking for support from Toyota directly.
Car stalled, sputtered and died. At first, I thought I was out of gas. After several tries, the car started and went 3 miles to gas station. After getting gas, the car wouldn't start several times and that same day the check engine light came on. We took it to Autozone to check the code and they said it was showing fuel pump failure. Today I'm taking it in to the dealer for service. It has started and run twice since the initial episode.
Electrical system
Odometer Fraud. The contact purchased a 2018 Toyota Sienna. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 57,000, and at the time of registration, it was discovered that the mileage was 175,152.
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.
2018 Toyota Sienna engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 8-speed automatic | FWD | 19 / 27 / 22 |
| 3.5L 6-cyl | 8-speed automatic | AWD | 18 / 24 / 20 |
EPA ratings. Class: Minivan.
Frequently asked questions
Is the 2018 Toyota Sienna a good car?
Based on 72 owner complaints filed with NHTSA, the 2018 Sienna rates better than average: 63% fewer complaints than a typical year of the Sienna at the same age. It is one of the best Sienna years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2018 Toyota Sienna?
The transmission & drivetrain — 20 complaints, 28% of all complaints for this model year. Next are the fuel & propulsion system (13) and electrical system (7).
How many recalls does the 2018 Toyota Sienna have?
There are 7 recalls for the 2018 Toyota Sienna, the most recent from November 4, 2020 (fuel pump). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Toyota Sienna?
The best years by complaints, compared at the same age, are 2020, 2019 and 2018. Years to avoid or approach with caution: 2005, 2006, 2011, 2008 and 2007. See the full Toyota Sienna years comparison.
At what mileage do 2018 Toyota Sienna problems happen?
The median mileage reported in complaints is about 30,000 miles; 68% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.