This is an online automotive information provider of a detailed information on complaints, defects and recalls for Toyota 4RUNNER 2003 electrical system. Our users can find data on mass market car models from most popular brands. The service allows to compare and analyze statistics for reported problems, complaints, recalls for various manufacturers. We hope our site will help with selecting of a reliable and safe car. By using this tool, you will be able to get records with description of safety issues for vehicles, equipment, tires and child restraints. These issues include safety recalls for your Toyota 4RUNNER 2003 electrical system and complaints other owners have filed.

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2003 Toyota 4RUNNER Electrical System Problems, Complaints and Defects

Issue ID	1258065
Internal NHTSA #	10823454
Manufacurer	Toyota Motor Corporation
Brand	TOYOTA
Model	4RUNNER
Model Year	2003
File date	05/08/10
Component	ELECTRICAL SYSTEM
Product type code	VEHICLE
Description of the problem	My 2003 toyota had emissions issues in that all four oxygen sensors would fail quickly. It took me two years and lots of money later to determine that the cause of this is because transmission fluid is wicking its way through the transmission solenoid harness all the way to the ecu and once there because of the way the ecu is mounted gets into all of the other wiring harnesses of just about every other sensor. I went to toyota and the first technician never heard that happening before but another overheard our conversation and said "i bet you have a 4runner" so yeah its happened to others. They wanted nearly $4500 to fix the issue. New engine wiring harness $1500-$2000 and another $1000 for the labor and the rest of the estimate is for other parts not specified. Their solution is to cut the wire below the transmission wiring harness connector then splice and solder but i would have to replace nearly all the critical wiring in that car. I cant give an exact date on when it started going wrong but i can look at the service history on the toyota owner's website and give you this timeline. 0-89,997 - no, issues with emissions or electrical systems. 89,997mi - 90k service done - transmission fluid change w/flush done at dealer. 98,152mi - car reporting lean codes, dealer replaces maf sensor. 100,117 - car reporting lean codes, dealer replaces o2 sensor and a/f sensor bank 2 position 1 & 2 105,312 - car reporting lean codes, dealer replaces bank 1 position 1 a/f sensor and maf sensor again. Total cost $798. 76. There are more but i have character limits. I will say this though that the problem should have been obvious because you can clearly see the fluid when you unplug the o2 sensor from the harness but toyota was content charging me $500-$700 every 10k miles without actually fixing it. Car still remained functional but ruined fuel economy.
Vehicle Mileage at Failure
Number of Occurences
Source of the issue	NHTSA WEB SITE
City and State	CABOT, AR
VIN pattern	JTEBU14R930XXXXXX
Was vehicle invloved in a crash?	N
Was vehicle involved in a fire?	N
Was incedent reported to police?	N
Was medical attention required?	N
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
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

What is Recall?
A recall is when a product is removed from the market or a correction is made to the product because it is either defective or potentially harmful.
What is Failure?
Failure is the state or condition of not meeting a desirable or intended objective, and may be viewed as the opposite of success. Product failure ranges from failure to sell the product to fracture of the product, in the worst cases leading to personal injury, the province of forensic engineering.
What is Defect?
Non-conformance of a car component with the specified requirements, or non-fulfillment of user expectations, including the safety aspects.

Last decoded VIN:

3GNEC12T64G315033 WAUZZZ4BZYN051158 1G6DP1E37D0170287 WBANA71030B101190 W1T94602210691341 W0LJC7EC3F4263218 WDD2221622A299105 WAUZZZ4G2BN026689 VF77N9HP0DJ864501 MA1LSRADD8ZK29480 GP7040144XXXXXXXX MLHJK0431T5705199

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2003 Toyota 4RUNNER Electrical System Problems, Complaints and Defects, Recalls and Failures

2003 Toyota 4RUNNER Electrical System Problems, Complaints and Defects

What is Recall?

What is Failure?

What is Defect?