Toyota Sienna Reliability Problems

Sienna owners have made 899 complaints over 23 model years. Using our PainRank™ system we've ranked it 30th in overall reliability out of 33 Toyota models, with real interior and body concerns.

6 Common Toyota Sienna Problems

A list of some of the most common issues Sienna owners have to deal with.

  1. Bluetooth Echos During Calls

    What's the point of hands-free calling if you can't have a conversation without an annoying echo getting in the way? That's the position many 2016-2019 Toyota owners find themselves in as they struggle with their car's bluetooth connection.

    Continue reading article "Bluetooth Echos During Calls"

  2. Oil Sludge in Toyota Engines

    Toyota settled a class-action engine-sludge suit in 2007 that covered an estimated 2.5-million Toyota and Lexus vehicles made between 1997 and 2002. In that case, Toyota agreed to repair 'sludged-up' engines for up to eight years from the t…

    Continue reading article "Oil Sludge in Toyota Engines"

  4. Rodents Chew Soy-Coated Wires

    Somewhere in the mid-2000's there was an industry-wide push by automakers to replace plastic and glass-based wiring insulation with a more eco-friendly soy-based coating. It's biodegradable, commendable, and a complete disaster for owners. …

    Continue reading article "Rodents Chew Soy-Coated Wires"

  6. Melting Dashboards

    One of the automotive world's worst science projects is coming to an end. Toyota dashboards have long been known to melt under the heat of the sun. The melted dashes warp and extrude a strange, goo-like substance that is oddly shiny and sti…

    Continue reading article "Melting Dashboards"

What Sienna Owners Complain About

Sometimes it helps just to tally up the complaints and see where the biggest stacks are. Use this information to learn about troublespots or to run for the hills.

Worst Issues

What Breaks the Most

Years to Avoid

Full Lists on CarComplaints.com

Sienna Generations

The Sienna has 3 generations, each with their own issues. Using the same PainRank™ system we've determined that you're better off avoiding the 2nd generation (2004–2010).

Sienna Key Numbers

  1. 899 complaints

    Running tally of owner grievances filed to CarComplaints.com.

  2. 948 service bulletins

    Documenting the process of troubleshooting common problems.

  3. 49 recall campaigns

    Time-sensitive, free repairs for widespread safety problems.

Sienna Class-Action Lawsuits

The Sienna has been named as a class vehicle in the following lawsuits.

  • Adam B. Lawler Law Firm, LLC, et al., v. Toyota Motor Sales, U.S.A., Inc., et al.

    3:21-CV-00354

    1. Case Filed

      A Toyota Bluetooth echo class action lawsuit has been filed by an Illinois law firm which alleges the hands-free phone systems are defective in multiple Toyota models that were not initially equipped with Apple CarPlay and have not had a head unit replaced by Toyota.

    Problem
    Bluetooth Echos During Calls
    Class Vehicles
    • 4Runner
    • Avalon
    • Avalon HV
    • Camry
    • Camry HV
    • Highlander
    • Highlander HV
    • Prius
    • Prius V
    • Sequoia
    • Sienna
    • Tacoma
    • Tundra
    • Yaris
    Class Members
    Illinois Residents
    Location
    Illinois

  • Freeman, et al., v. Toyota Motor Sales, U.S.A., Inc. et al.

    1. Case Filed

      Toyota Bluetooth echo problems have caused a class action lawsuit that alleges when the driver of the Toyota uses the hands-free phone system to make or receive a call, the person on the other end of the call hears an echo of their own words.

    Problem
    Bluetooth Echos During Calls
    Class Vehicles
    • 2017-2018 4Runner
    • 2017-2018 Avalon
    • 2017-2018 Avalon Hybrid
    • 2016-2018 Highlander
    • 2016-2018 Highlander Hybrid
    • 2016-2018 Prius
    • 2016-2018 Prius V
    • 2016-2018 Sequoia
    • 2016-2018 Sienna
    • 2016-2018 Tacoma
    • 2016-2018 Tundra
    • 2018 Yaris
    Location
    Missouri

Recent Sienna News

There's a lot of news out there, but not all of it matters. We try to boil down it to the most important bits about things that actually help you with your car problem. Interested in getting these stories in an email? Signup for free email alerts over at CarComplaints.com.

  1. A lawsuit wonders how Toyota can keep calling their bluetooth implementation "hands-free" when owners very much need to use their hands to prevent echos on each and every call.

    For years owners have complained about this issue, but Toyota's only suggestion has been to pickup the phone and turn it's volume all the way up after the call has been initiated. Oh, and also make sure the radio volume is below level 45. Sorta defeats the point, don't you think?…

    keep reading article "Illinois Lawsuit Says Toyota's Hands-Free Calling is Unusable"

  2. Someday the Takata Recalls will end. Today is not that day.

    Toyota has recalled the passenger-side inflators in 1.7 million vehicles across North America.

    The airbags currently in the vehicles have metal inflators that contain ammonium nitrate without a drying agent added to protect the chemical from moisture. The moisture can destabilize the ammonium nitrate and turn the metal inflator into a grenade full of shrapnel.

    The affected vehicles include the 2010-2016 4Runner, 2010-2013 Corolla, 2010-2013 Matrix, and 2011-2014 Sienna. Toyota plans on sending out recall notices towards the end of January.

    keep reading article "Toyota Announces Latest in Series of Takata Recalls"

  3. Toyota has blamed a musty A/C smell on microbes [i.e., mold] growing o the evaporator surface and now a lawsuit wants them to do something about it.

    The plaintiffs claim the vehicles have defective heating, ventilation and air conditioning (HVAC) systems that cause smells and health problems from mold that collects on the evaporators. Numerous complaints have allegedly been filed with the government, Toyota and Lexus dealerships nationwide since at least 1999.

    This isn't the first time Toyota has been sued for musty A/C units.

    keep reading article "Air Conditioner Lawsuit Complains About Mold Smell From Toyota HVAC"

  8. When Toyota switched away from using plastic or glass-based inulation in favor of soy, it invited in some very unwelcome Toyota loyalisits.

    According to the plaintiff, she learned the hard way about the soy wiring when her Avalon wouldn't start and a look under the hood showed wires chewed, so she had the car towed to a dealer. Toyota told her rodents had caused the damage and it would be no problem to repair the problems as long as she could cough up $6,000 to cover the bill.

    The soy-based wiring is allegedly attracting in rodents, who love to chew it up and use it for nesting material. The lawsuit, Heidi Browder vs. Toyota Motor Corporation, et al. follows a similar lawsuit filed against Honda earlier this year.

    keep reading article "Lawsuit Says Toyota’s Use of Soy-Based Wiring is Attracting Rodent Damage"

See All Sienna News

Other Toyota Models