| Issue ID | 1003837 |
| Internal NHTSA # | 10535749 |
| Manufacurer | TOYOTA MOTOR CORPORATION |
| Brand | TOYOTA |
| Model | SIENNA |
| Model Year | 2004 |
| File date | 13/06/13 |
| Component | ELECTRONIC STABILITY CONTROL |
| Product type code | VEHICLE |
| Description of the problem | My car is a 2004 toyota sienna awd xle limited. The vehicle will activate the vehicle skid control (vsc) without warning while driving on smooth dry roads. The effect is for the vehicle to apply brakes strongly to specific wheels pulling the car strongly to one side. This happens most frequently while driving winding roads and in corners. It has become more regular it it's occurrence and has happened on relatively straight sections of highway most recently. A similar situation occurred approx 2 years ago. At that time the retailer repaired it by adjusting the steering sensor used by the vsc and stated that this should be done periodically dependent on alignment work done on the vehicle. This solved the issue at that time. It is very dangerous both to the vehicle which requires great effort to maintain control and the vehicles following it which are at risk of rear ending the effected car. The toyota retailer initially indicated that a catalyst failure was the cause (yes they said this). I was told that the cat failure could induce other brake and engine related failures. The cat was replaced and the vsc failure has resumed. At this time no failures of any kind are indicated. I have researched this topic and find about a dozen identical failures on 2014 toyota siennas documented in various user forums. As there are only a few documented on the nhtsa site i am concerned that the situation is under reported. Many of these user forums indicate that the symptoms were reported to the manufacturer. My most recent trouble report case number from toyota is [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6). |
| Vehicle Mileage at Failure | 205000 |
| Number of Occurences | 1 |
| Source of the issue | NHTSA WEB SITE |
| City and State | SOLVANG, CA |
| VIN pattern | 5TDBA22C24SXXXXXX |
| Was vehicle invloved in a crash? | N |
| Was vehicle involved in a fire? | N |
| Was incedent reported to police? | N |
| Was medical attention required? | |
| Was part original equipment? | |
| No. of injured persons | 0 |
| No. of fatalities | 0 |
| Date of purchase | 07/08/26 |
| Was original owner? | N |
| Anti-lock brakes | N |
| Cruise control | N |
| Number of cylinders | 6 |
| Drive train type | |
| Transmission type | |
| Vehicle speed | 55 |
| DoT tire identifier | |
| Tire size | |
| Location of tire code | |
| Type of tire failure code | |
| Was defective tire repaired? | |
| Date of manufacture | |
| Type of child seat code | |
| Type of restraint | |
| Dealer's name | |
| Dealer's telephone number | |
| Dealer's city | |
| Dealer's state code | |
| Dealer's ZIP code |