| Issue ID | 995866 |
| Internal NHTSA # | 10525286 |
| Manufacurer | TOYOTA MOTOR CORPORATION |
| Brand | TOYOTA |
| Model | SIENNA |
| Model Year | 2004 |
| File date | 04/07/12 |
| Component | SERVICE BRAKES |
| Product type code | VEHICLE |
| Description of the problem | Traction control unexpectedly engaged while i was driving on the curvy hwy 17 from santa cruz to san jose, california on july 04, 2012. The traction control light came on with sound "bip, bip. Bip.... I lost control of the car in a very short moment and cars adjacent to me veered away to avoid me. I almost caused an accident. I had both toyota dealership and qualified auto shop test my van, replaced a fault sensor (recemended by toyota dealer) but the same problem remains. I had toyota dealership and private qualied auto technician test the van again and they could not repeat the same problem, and determined that there was nothing wrong with it. During the past 12 months i experienced traction control problem around 10 times, the last 2 times were in july 2013. The problem happens only on curvy roads, at any speed, and in a very short moment, around 1-5 seconds before the traction control light and sound go off. This is a very serious safety problem. |
| Vehicle Mileage at Failure | 137000 |
| Number of Occurences | 1 |
| Source of the issue | NHTSA WEB SITE |
| City and State | ELK GROVE, CA |
| VIN pattern | 5TDZA22C44SXXXXXX |
| 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 | 60 |
| 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 |