| Issue ID | 750464 |
| Internal NHTSA # | 10294775 |
| Manufacurer | TOYOTA MOTOR CORPORATION |
| Brand | TOYOTA |
| Model | SIENNA |
| Model Year | 2004 |
| File date | 15/03/09 |
| Component | VEHICLE SPEED CONTROL |
| Product type code | VEHICLE |
| Description of the problem | Failure of the adaptive cruise control module on a 2004 toyota sienna xle limited. The adaptive cruise control module, located under the front bumper on the passenger side, fails completely and continuously resulting in complete failure of the cruise control system. The module is not sealed properly thereby allowing moisture inside resulting in corrosion and failure of the part. When actuated, the part is designed to automatically slow the vehicle while approaching slower traffic from behind. Failure of this part while driving could result in an accident if the module does not automatically slow the vehicle properly. The vehicle in question has only 85,000 miles on it. The vehicle has 88,000 miles on it know. The vehicle was taken to kelso toyota in appleton, wi where i was told that the unit need to be replaced. I disassembled the unit and found the corrosion. I believe the deal would simply replace the unit with new and then discard the old unit not knowing why it failed. I believe the wrong oring material was used. I believe in cold weather the oring shrinks allowing water into the modules cabinet resulting in the failure. |
| Vehicle Mileage at Failure | 85000 |
| Number of Occurences | 1 |
| Source of the issue | NHTSA WEB SITE |
| City and State | APPLETON, WI |
| VIN pattern | 5TDBA22C74SXXXXXX |
| 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 | |
| No. of fatalities | |
| Date of purchase | 07/08/26 |
| Was original owner? | N |
| Anti-lock brakes | N |
| Cruise control | N |
| Number of cylinders | |
| Drive train type | |
| Transmission type | |
| Vehicle speed | 25 |
| 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 |