What's Wrong with the 1st Generation (1998–2003) Sienna?

Sienna owners have made 115 complaints about the 1998–2003 model years. Using our PainRank™ system we've ranked it 47th out of 81 Toyota generations in overall reliability, with some engine and exterior concerns.

Compare With Other Sienna Generations

Common 1998-2003 Toyota Sienna Problems

Some of the worst issues 1st generation Sienna owners have to deal with.

  1. 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"

  2. 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 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

1st Generation (1998–2003) Sienna Key Numbers

  1. 6 model years

    Grouping all models by their year can reveal some baddies.

  2. 115 complaints

    Running tally of owner grievances filed to CarComplaints.com.

  3. 47th in reliability

    Overall reliability rank out of 81 eligible generations.

Recent 1st Generation (1998–2003) 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. It's been a while since Toyota announced their extended warranty program for melting dashbord in 3.5 million vehicles.

    So, how are things going? According to [a] lawsuit, when Toyota first announced the warranty program the automaker notified customers and said it could take months to gather the replacement parts. However, Toyota then sent a second notice that removed the information about a timeline for repairs.

    Oh, well it can't be too long before everyone gets their replacement dash, right?…

    keep reading article "Owners Are Still Waiting For Replacement Dashboards"

  2. One of the automotive world's worst science projects is coming to an end. Toyota dashboards have [long been known to melt and warp][19] under the heat of the sun.

    The deformed dashes have also been known to extrude a strange, goo-like substance that is oddly shiny and sticky; like something you'd find in a toddler's coat pocket. This led to some understandably upset owners and a couple of lawsuits. Feeling the heat of pending litigation, Toyota announced they will extend warranty coverage on the dashboards in 3.5 million vehicles rather than go to court. I guess they wanted to avoid a sticky situation (I never promised that the jokes would be good, folks).…

    keep reading article "Toyota Tries to Get Out of Sticky Dashboard Situation with Warranty Extension"