One problem related to brake master cylinder has 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.
My brake master cylinder has had to be replaced 4 times in the last 2. 5 years. I was terrified when my brakes would not my brake pedal went all the way down to the floor. Since I am a disabled driver who cannot transfer in and out of my wheelchair on my own made it extremely worse! the first time the van had 5000 mi on it. The second time with within 25 mi and a day after I picked it up from the dealership! the dealership cover it under my warranty for the first 2 times in may of '08. Now that it happened again. I was told that it was not covered under my warranty because my van was modified, but it ha 24,000 mi and 2. 5 year old. The brake master cylinder was not tampered with during the conversion process and is a Toyota part. There was an investigation done to find out who was at fault. It was determined that Toyota's part was defective but the dealership still refuse to warranty it! the dealerships are unwilling to even help us find a solution. Now I'm forced pay 1000. 00+ to fix it when it should be cover under warranty. I am forced to fix it because it's my only means of transportation! my family and I are extremely upset with the service and difficulties we are receiving. I would think that if the problem is not Toyota's fault, then should go the extra mile to help resolve it instead of leaving their customers out in the cold! terrible way to do business!.