2003 TOYOTA 4RUNNER Electrical System Problems

THE REAR TIRE ASSEMBLY RIPPED LOOSE FROM ITS MOUNTS UNDER NORMAL DRIVING CONDITIONS..A LOUD CLUNK NOISE....THEN .BRAKES WERE LOST AND THE ELECTRICAL SYSTEM SHOWED WARNING LIGHTS ON DASH BOARD...CAR IS NOT DRIVABLE...MASSIVE RUST AT FAILURE POINTS

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...

UPON STARTING VEHICLE, GAS GAUGE AND TACHOMETER DID NOT WORK. TURNED IGNITION OFF THEN RESTARTED AND GAS GAUGE FLUCTUATED AND FINALLY RESPONDED, BUT NO RESPONSE FROM TACHOMETER. AFTER DRIVING VEHICLE WITH AIR ON, STOPPED AT STORE THEN STARTED VEHICLE AND ALL GAUGES WORKED. THIS HAS HAPPENED QUITE OFTEN SINCE IT IS GETTING WARM. I HAVE READ BLOGS WHERE OTHER OWNERS OF THE SPORT MODEL ARE EXPERIENCING THE SAME ISSUE WITH THE CLUSTER FAILING. SOME HAVE TRIED TO GET REPAIRED AND THAT'S A 50/50 SHOT. THE ONLY WAY TO RESOLVE IS TO REPLACE CLUSTER AT $300.00 USED WITHOUT LABOR AND AN EXTRA FEE OF $100.00 TO CALIBRATE MILEAGE. TOYOTA IS AWARE OF ISSUE, BUT FAILS TO RESPOND.

ON APPROXIMATELY FEBRUARY 28, 2012, THE ABS/TRAC CONTROL/VSC LIGHTS CAME ON AND REMAINED LIT ON MY 2003 TOYOTA 4RUNNER. I CALLED THE DEALERSHIP AND THEY SAID TO BRING IT IN RIGHT AWAY. THEY DIAGNOSED THE CAR AND CAME UP WITH "NO SENSOR READING?. IT COST ME $150 FOR THE DIAGNOSTIC TEST. I PICKED UP THE CAR AND A FEW WEEKS LATER I BROUGHT IT BACK FOR THE SAME PROBLEM. THE COMPUTER THEN INDICATED THAT THERE WAS A FAULTY O2 SENSOR WHICH THEY REPLACED MY COST WAS OVER $650. THE NEXT WEEK THE LIGHTS CAME ON AGAIN. THE DEALERSHIP KEPT THE CAR FOR A FEW DAYS BUT LATER REPORTED THAT THEY COULD NOT DUPLICATE THE PROBLEM. THEY TOLD ME THAT I SHOULD WAIT UNTIL IT GOT WORSE AND BRING IT BACK. I SUFFERED WITH THIS PROBLEM FOR MONTHS. I SAY SUFFERED BECAUSE WHEN I WAS IN PARK AND THESE LIGHTS CAME...

THE VEHICLE WOULD REV ITSELF UP TO A HIGH RPM, FROM A STOPPED POSITION WHEN I STEPPED ON THE GAS THE VEHICLE WOULD GO IN REVERSE. THE DEALERSHIP EVENTUALLY REPLACED THE TRANSMISSION ONLY AFTER THE MANAGER BORROWED IT OVERNIGHT AND EXPERIENCED IT HIMSELF, BUT I HAVE NOTICED THE PROBLEM BEGINNING AGAIN. ANOTHER PROBLEM IS THE RADIATOR LEAKING AND NEEDED TO BE REPLACED (I WAS TOLD IT HAD THE WRONG KIND OF ANTIFREEZE; IT WAS GREEN AND IT NEEDS A RED KIND???). WHEN REPLACING THIS I WAS NOTIFIED THAT MY FRONT BRAKES WERE PAPER THIN AND NEEDED TO BE REPLACED THIS REPAIR COST ME ALMOST $2000. ANOTHER PROBLEM IS THE REAR WINDOW TRIM HAS SHRUNK. I ALSO HAD THE SUNROOF REPLACED AFTER OWNING THE VEHICLE LESS THAN TWO YEARS. THE BRAKE LIGHT ON THE REAR HATCH DOES NOT WORK AS WELL AS THE REAR WIPERS (ALSO WHEN I HOOKED A TRAILER...

I PURCHASED A BRAND NEW 2003 TOYOTA 4RUNNER IN MAY 2003. IN ONE COLD MORNING OF JAN. 2005, I WAS DRIVING IT IN HIGHWAY THAT WAS STILL COVERED WITH SOME SNOW. ALL OF SUDDEN, AN ENGINE CHECK LIGHT ON THE DASHBOARD WAS AUTOMATICALLY TURNED ON, FOLLOWED BY VSC LIGHTS, INDICATING THAT A VEHICLE SKID CONTROL FUNCTION WAS AUTOMATICALLY TURNED OFF. AT THAT POINT, I COULD NOT DRIVE THE CAR BEYOND 50 MPH, NO MATTER HOW HARD OR FREQUENTLY I PUSHED THE ACCELERATOR PEDAL. I PULLED OVER, RESTARTED, AND RE-ENTERED THE HIGHWAY BUT HAD THE SAME RESULTS. I MANAGED TO DRIVE THE CAR TO A DEALER FOR INSPECTION THE SAME DAY. THE DEALER COULD NOT FIND A CAUSE AND SIMPLY RESET THE COMPUTER CONTROLLER. THIS SEEMED TO HAVE RESOLVED THE PROBLEM AT THAT TIME. HOWEVER, THE ENGINE CHECK AND VSC LIGHT ISSUES RESURFACED ABOUT TWO YEARS LATER. THE DIFFERENCE THIS TIME...

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...