CONSUMER COMPLAINED ABOUT A SULFUR SMELL THROUGHOUT THE INTERIOR OF THE VEHICLE. CONSUMER TOOK VEHICLE BACK TO DEALERSHIP, BUT DEALER WAS UNABLE TO RESOLVE THE PROBLEM. *AK
2003 Toyota 4 Runner
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2003 Toyota 4 Runner do not stand out strongly from the model-year median of 96.5.
About this comparison →How this year compares
Owner complaints by model year
Compare all 4 Runner years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
89 reports with mileage · 79 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Engine And Engine Cooling. Review the 75 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 18 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Seats. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
75 reports2003 4 RUNNER V6 HAS LOUD TICKING NOISE COMING FROM ENGINE CONMPARTMENT. I RAN IT BY THE DEALERSHIP 1 WEEK AFTER PURCHASE TOO SEE WHAT THE PROBLEM WAS. SERVICE MANAGER SAID IT WAS NORMAL. APPROXIMATLY 2 MONTHS LATER REAR SEAT WAS SQUEAKING. MADE APPOINTMENT WITH DEALER HAD THEM FIX THE SEAT AND DIAGNOSE THE NOISE COMING FRO…
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2003 4 RUNNER V6 HAS LOUD TICKING NOISE COMING FROM ENGINE CONMPARTMENT. I RAN IT BY THE DEALERSHIP 1 WEEK AFTER PURCHASE TOO SEE WHAT THE PROBLEM WAS. SERVICE MANAGER SAID IT WAS NORMAL. APPROXIMATLY 2 MONTHS LATER REAR SEAT WAS SQUEAKING. MADE APPOINTMENT WITH DEALER HAD THEM FIX THE SEAT AND DIAGNOSE THE NOISE COMING FROM ENGINE COMPARTMENT AGAIN. THEY FIXED THE SEAT AND WAS TOLD IT WAS THE INJECTORS MAKING THE NOISE. I TOLD THE SEVICE MANAGER THAT I WAS NOT HAPPY WITH THE QUALITY. THE 2002 4 RUNNER IS VERY QUIET. I AM PLANNING A RETURN TRIP TO THE DEALER WHEN I FIND ENOUGH INFORMATION ON THE PROBLEM.*AK
EMISSION SYSTEM PROBLEM, THE CATALYTIC CONVERTER IS PRODUCING A GASTRIC SMELL WHICH IS UNBEARABLE. ALSO, CAUSES THE DRIVER TO GET SICK WHILE DRIVING.*AK
2003 V8 4 RUNNER EMITS ROTTEN EGG SMELL, PRIMARILY DURING QUICK ACCELERATION. WAS TOLD BY DEALER TO USE HIGHER GRADE OF GASOLINE. HAVE TRIED HIGHER GRADES OF GAS IN THE PAST AND THIS DOES NOT ALWAYS HELP. TOYOTA DOES NOT SEE THIS AS A VEHICLE PROBLEM. *LA
THIS IS A CONTINUAL PROBLEM. WHENEVER WE HAVE THE REAR WINDOW DOWN, THERE IS A TERRIBLE ODOR THAT PERMEATES THE AUTOMOBILE. IT MAKES ME NAUSEA AND GIVES ME TERRIBLE HEADACHES. THE DEALER SAID WE SHOULD OPEN ONE OF THE SIDE WINDOWS. I PUT A DATE, BECAUSE THE SITE WOULD NOT ACCEPT THIS UNLESS I DID. *LA
I HAVE EXPERIENCED A STRONG SULFUR ODOR IN MY NEW 2003 TOYOTA 4 RUNNER SINCE I PURCHASED THE VEHICLE. THIS SMELL HAS NOT GONE AWAY, AND IN FACT HAS GOTTEN EVEN WORSE. I USE THE VEHICLE FOR TOWING PURPOSES ALSO AND THE SMELL IS UNBEARABLE WHEN TOWING SOMETHING. I HAVE RETUNRED THE VEHICLE TO THE DEALER ON SEVERAL OCCASIONS AND HA…
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I HAVE EXPERIENCED A STRONG SULFUR ODOR IN MY NEW 2003 TOYOTA 4 RUNNER SINCE I PURCHASED THE VEHICLE. THIS SMELL HAS NOT GONE AWAY, AND IN FACT HAS GOTTEN EVEN WORSE. I USE THE VEHICLE FOR TOWING PURPOSES ALSO AND THE SMELL IS UNBEARABLE WHEN TOWING SOMETHING. I HAVE RETUNRED THE VEHICLE TO THE DEALER ON SEVERAL OCCASIONS AND HAVE BEEN ADVISED THAT THERE IS NOTHING HAT CAN BE DONE. THE DEALER KEEPS TRYING TO ADVISE THAT IT THE FULE CHOICE THAT I MAKE, THIS CANNOT BE TRUE SINCE I TRAVEL WITHIN THREE STATES AND RARELY FULE AT THE SAME SIGHTS, AND UTILIZE A VARIETY OF DIFFERENT BRANDS ALSO, AND SINCE THIS PROBLEM APPEARS TO BE NATIONWIDE HOW CAN THE DEALER INSIST THAT IT IS THE FUEL? I HAVE GOTTEN TO THE POINT THAT I DO NOT WANT THIS NEW VEHICLE, ITS A GREAT VEHICLE TOHER THAN THIS PROBLEM, BUT WHEN YOU CANNOT RIDE IN THE VEHICLE DUE TO THE SMELL, HEADACHES, AND WHEN CLEINTS GET IN ...ITS DOWN RIGHT EMBARRASSSING !*AK
WHILE DRIVING MODERATE TO HEAVY ACCELERATION WITH ALL WINDOWS UP AND INTERNAL AIR CIRCULATION THERE IS A STRONG ROTTEN EGG/SULFUR TYPE SMELL??? THIS IS ON A 2003 LIMITED 4-RUNNER BOUGHT NEW IN MARYLAND;DARCARS;THIS IS VERY IRRITATING AND MAKES MY KIDS 10YRS AND 11 YRS. OLD SICK. VERY CONFUSED WHAT IS CAUSING THIS??????? PL…
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WHILE DRIVING MODERATE TO HEAVY ACCELERATION WITH ALL WINDOWS UP AND INTERNAL AIR CIRCULATION THERE IS A STRONG ROTTEN EGG/SULFUR TYPE SMELL??? THIS IS ON A 2003 LIMITED 4-RUNNER BOUGHT NEW IN MARYLAND;DARCARS;THIS IS VERY IRRITATING AND MAKES MY KIDS 10YRS AND 11 YRS. OLD SICK. VERY CONFUSED WHAT IS CAUSING THIS??????? PLEASE HELP..*JB
I HAVE A 2003 TOYOTA 4 RUNNER. I PURCHASED THE VEHICLE 1 1/2 MONTHS AGO AND CURRENTLY HAVE 3000 MILES ON THE VEHICLE. WHEN I HAVE THE REAR WINDOW DOWN I SMELL A STRONG ODOR. THE ODOR HAS AN ACID AMMONIA LIKE SMELL. THE ODOR IS SO STRONG AT TIMES THAT IT TAKES MY BREATH AWAY. AT TIMES, THE ODOR ALSO ENTERS MY VEHICLE WHEN MY…
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I HAVE A 2003 TOYOTA 4 RUNNER. I PURCHASED THE VEHICLE 1 1/2 MONTHS AGO AND CURRENTLY HAVE 3000 MILES ON THE VEHICLE. WHEN I HAVE THE REAR WINDOW DOWN I SMELL A STRONG ODOR. THE ODOR HAS AN ACID AMMONIA LIKE SMELL. THE ODOR IS SO STRONG AT TIMES THAT IT TAKES MY BREATH AWAY. AT TIMES, THE ODOR ALSO ENTERS MY VEHICLE WHEN MY WINDOWS ARE ROLLED UP. THE STENCH IS SO STRONG THAT PASSENGERS IN MY CAR HAVE NOTICED IT (WINDOWS ROLLED UP). DUE TO THE ABOVE I AM VERY CONCERNED FOR MY HEALTH. I HAVE BROUGHT THE PROBLEM TO THE ATTENTION OF MY DEALERSHIP (SERVICE AND THE OPERATIONS DIRECTOR). SERVICE CHECKED THE CAR AND BOTH SERVICE AND THE OPERATIONS DIRECTOR ARE TELLING ME THAT IT IS THE GAS I AM USING. THEY ARE TELLING ME THAT I NEED TO USE SUNOCO GAS (OR A PREMIUM GAS COMPANY, BUT RECOMMEND SUNOCO) AND THAT I NEED TO USE AN OCTANE ABOVE 90. I AM ON MY 4TH TANK OF SUNOCO 93 OCTANE GAS AND THE PROBLEM STILL CONTINUES!! I HAVE BEEN IN CONTACT WITH THE NJ STATE DEPARTMENT OF ENVIRONMENTAL PROTECTION, BUREAU OF MOTOR VEHICLE INSPECTION AND MAINTENANCE. MY CAR HAS TESTED HIGH FOR CARBON MONOXIDE WITH THE WINDOW OPEN AND CLOSED AND WITH MY CIRCULATION VENT ON. I AM CURRENTLY WAITING FOR THE REPORT FROM DMV. THIS SITUATION IS ABSOLUTELY UNACCEPTABLE ON ANY CAR ESPECIALLY THIS $40,000 CAR. THIS PROBLEM HAS BEEN ONGOING AND THERE DOES NOT APPEAR TO BE AN END IN SIGHT! TOYOTA HAS A WONDERFUL REPUTATION BUT IN THIS SITUATION IT IS QUITE CLEAR THEY ARE HIDING BEHIND GAS COMPANIES. WHAT CAN I DO TO GET TOYOTA TO CORRECT THIS PROBLEM???? PLEASE HELP!!! *JB
DEAR NHTSA, I PURCHASED A 2003 TOYOTA 4 RUNNER IN NOVEMBER 2002. THIS VEHICLE OMITS A SULFUR SMELL THAT IS EASILY DETECTABLE AND HORRIBLE TO HAVE TO SMELL WHEN DRIVEN. IT PLAIN STINKS. IT STINKS WITH ALL WINDOWS UP. IT STINKS WORSE WITH THE SIDE WINDOWS OR SUNROOF OPEN. I COMPLAINED TO THE DEALER THE DAY AFTER PURCHASING THE VE…
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DEAR NHTSA, I PURCHASED A 2003 TOYOTA 4 RUNNER IN NOVEMBER 2002. THIS VEHICLE OMITS A SULFUR SMELL THAT IS EASILY DETECTABLE AND HORRIBLE TO HAVE TO SMELL WHEN DRIVEN. IT PLAIN STINKS. IT STINKS WITH ALL WINDOWS UP. IT STINKS WORSE WITH THE SIDE WINDOWS OR SUNROOF OPEN. I COMPLAINED TO THE DEALER THE DAY AFTER PURCHASING THE VEHICLE. I HAVE BROUGHT THE 2003 4RUNNER TO THE DEALER NUMEROUS TIMES AND EMAILED COMPLAINTS ABOUT THE SULFUR SMELL TO TOYOTA USA TO ADDRESS THE FACT EMISSIONS WERE ENTERING THE CABIN. I EVEN MET WITH A REGIONAL TECH FROM TOYOTA USA ON TWO OCCASIONS. EACH TIME TOYOTA FAILED TO REMEDY THE PROBLEM OF EMISSIONS ENTERING THE CABIN OF THE 2003 4RUNNER. THE SULFUR SMELL BEING OMITTED INTO THE CABIN IS AWFUL TO BREATH FOR NOT ONLY MYSELF, BUT ANYONE ELSE TRAVELING WITH ME. I HAVE NO IDEA WHAT HEALTH HAZARD THE SULFUR SMELL POSES OR WHAT OTHER EMISSIONS MUST BE ENTERING THE CABIN. I HAVE BEEN COMPLAINING TO TOYOTA FOR ALMOST ONE YEAR ABOUT THIS PROBLEM, AND RECENTLY I LEARNED THE ISSUE OF EMISSIONS ENTERING THE CABINS OF OTHER THE 2003 4RUNNER IS BEING WIDELY REPORTED BY OTHER 2003 TOYOTA 4RUNNER OWNERS. TOYOTA HAS FAILED TO REMEDY THIS DESIGN DEFECT WITH ME, OR ADDRESS THE HEALTH/SAFETY ISSUE OF EMISSIONS ENTERING THE CABIN WITH ME. THE 2003 TOYOTA 4RUNNER IS DEFECTIVE AND SHOULD BE RECALLED TO EFFECTIVELY CORRECT THE FACT THAT EMISSIONS ARE ENTERING THE CABIN OF THE VEHICLE. IN ADDITION, TOYOTA HAS BEEN FIRM IN THEIR POSITION THAT THE VEHICLE IS OPERATING CORRECTLY, THEY ARE COVERING UP A KNOWN DEFECT AND NEED TO BE HELD ACCOUNTABLE. I WOULD APPRECIATE A RESPONSE FROM NHTSA. THANK YOU AND BEST REGARDS, BILL VALENTINE 206-297-6535. *JB
I PURCHASED A 2003 TOYOTA 4 RUNNER IN NOVEMBER 2002. THIS VEHICLE OMITS A SULFUR SMELL THAT IS EASILY DETECTABLE AND HORRIBLE TO HAVE TO SMELL WHEN DRIVEN. IT PLAIN STINKS. IT STINKS WITH ALL WINDOWS UP. IT STINKS WORSE WITH THE SIDE WINDOWS OR SUNROOF OPEN. I COMPLAINED TO THE DEALER THE DAY AFTER PURCHASING THE VEHICLE. …
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I PURCHASED A 2003 TOYOTA 4 RUNNER IN NOVEMBER 2002. THIS VEHICLE OMITS A SULFUR SMELL THAT IS EASILY DETECTABLE AND HORRIBLE TO HAVE TO SMELL WHEN DRIVEN. IT PLAIN STINKS. IT STINKS WITH ALL WINDOWS UP. IT STINKS WORSE WITH THE SIDE WINDOWS OR SUNROOF OPEN. I COMPLAINED TO THE DEALER THE DAY AFTER PURCHASING THE VEHICLE. I HAVE BROUGHT THE 2003 4RUNNER TO THE DEALER NUMEROUS TIMES AND EMAILED COMPLAINTS ABOUT THE SULFUR SMELL TO TOYOTA USA TO ADDRESS THE FACT EMISSIONS WERE ENTERING THE CABIN. I EVEN MET WITH A REGIONAL TECH FROM TOYOTA USA ON TWO OCCASIONS. EACH TIME TOYOTA FAILED TO REMEDY THE PROBLEM OF EMISSIONS ENTERING THE CABIN OF THE 2003 4RUNNER. THE SULFUR SMELL BEING OMITTED INTO THE CABIN IS AWFUL TO BREATH FOR NOT ONLY MYSELF, BUT ANYONE ELSE TRAVELING WITH ME. I HAVE NO IDEA WHAT HEALTH HAZARD THE SULFUR SMELL POSES OR WHAT OTHER EMISSIONS MUST BE ENTERING THE CABIN. I HAVE BEEN COMPLAINING TO TOYOTA FOR ALMOST ONE YEAR ABOUT THIS PROBLEM, AND RECENTLY I LEARNED THE ISSUE OF EMISSIONS ENTERING THE CABINS OF OTHER THE 2003 4RUNNER IS BEING WIDELY REPORTED BY OTHER 2003 TOYOTA 4RUNNER OWNERS. TOYOTA HAS FAILED TO REMEDY THIS DESIGN DEFECT WITH ME, OR ADDRESS THE HEALTH/SAFETY ISSUE OF EMISSIONS ENTERING THE CABIN WITH ME. THE 2003 TOYOTA 4RUNNER IS DEFECTIVE AND SHOULD BE RECALLED TO EFFECTIVELY CORRECT THE FACT THAT EMISSIONS ARE ENTERING THE CABIN OF THE VEHICLE. IN ADDITION, TOYOTA HAS BEEN FIRM IN THEIR POSITION THAT THE VEHICLE IS OPERATING CORRECTLY, THEY ARE COVERING UP A KNOWN DEFECT AND NEED TO BE HELD ACCOUNTABLE. I WOULD APPRECIATE A RESPONSE FROM NHTSA. THANK YOU AND BEST REGARDS, BILL VALENTINE. *JB
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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