| Issue ID | 741989 |
| Internal NHTSA # | 10286534 |
| Manufacurer | TOYOTA MOTOR CORPORATION |
| Brand | TOYOTA |
| Model | 4RUNNER |
| Model Year | 2003 |
| File date | 03/10/09 |
| Component | ELECTRICAL SYSTEM |
| Product type code | VEHICLE |
| Description of the problem | After replacing an oxygen sensor several times, the dealership finally discovered the root of the problem that is making the oxygen sensor and traction control circuit short out. The air divertor flap inside the hvac box under the dash had grease applied to the flap hinges in the factory. Directly below the flap is a wiring harness which drops down from the hvac box and plug into the ecu. Over time the grease has traveled down through the wiring harness to the electrical connection plug into the ecu causing various circuits to short. No damage at present, however various safety circuits such as traction control are being affected. Furthermore, as oil is combustible, an interior fire could result from the oil penetrating the 12 volt electrical connection point on the ecu. This issue/ problem should be considered hazardous and should be a recall to replace the wiring harness and ecu as well as clean the grease out of the hvac box. |
| Vehicle Mileage at Failure | 93555 |
| Number of Occurences | 1 |
| Source of the issue | NHTSA WEB SITE |
| City and State | CHAPIN, SC |
| VIN pattern | JTEBU14R530XXXXXX |
| 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 | 0 |
| 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 |