Three problems related to transmission gear slipping have been reported for the 2007 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Toyota Sienna based on all problems reported for the 2007 Sienna.
The transmission started slipping and then went out completely, causing the van to be unable to move at all. This occurred on a public highway. The transmission required complete replacement at a cost of over $5000. 00.
Upon slowing down to turn a street corner the transmission slipped before it would go again. It seemed that it was between the slowing down and re-accelerating after the turn. This problem is well documented on google by many drivers. The dealers reprogram some computer and then declare it to be fixed when the same problem occurs again. Toyota refuses to fix the problem which costs one about $3,000 to actually fix it by replacing the transmission. I bought the van as used.
Transmission slipping on 2007 Toyota Sienna van. When traveling at 6-8 mph the transmission will slip when the accelerator is depressed. The van will hesitate then suddenly lurch forward. The dealer says that this is normal and will not do anything to repair it.