NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
154 reports158,000 miles · Jul 23, 2013
Power TrainSuspension
DRIVING DOWN THE HIGHWAY IN 2001 TOYOTA 4-RUNNER GOING ABOUT 60 AND ALL OF A SUDDEN THE REAR END/TIRES LOCKED UP AND GOT IT TO THE SIDE OF HIGHWAY BARELY AND THEN IT STARTED SMOKING REALLY BAD. VERY LUCKY THAT IT DIDN'T CAUSE A WRECK OR NO ONE GOT HURT. CAN'T DRIVE IT OR NOTHING, MAKES A LOUD KNOCKING NOISE IN THE REAR END…
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DRIVING DOWN THE HIGHWAY IN 2001 TOYOTA 4-RUNNER GOING ABOUT 60 AND ALL OF A SUDDEN THE REAR END/TIRES LOCKED UP AND GOT IT TO THE SIDE OF HIGHWAY BARELY AND THEN IT STARTED SMOKING REALLY BAD. VERY LUCKY THAT IT DIDN'T CAUSE A WRECK OR NO ONE GOT HURT. CAN'T DRIVE IT OR NOTHING, MAKES A LOUD KNOCKING NOISE IN THE REAR END AND ALSO WHEN YOU TURN THE KEY ON INSIDE THE VEHICLE ALL LIGHTS ARE ON AND ITS MAKING A TERRIBLE BUZZING NOISE. SO HAD TO HAVE IT TOWED AND THAT COST ME ALSO AND I NEED THE WHOLE REAR DIFFERENTIAL AND THAT'S A LOT OF MONEY. I'VE SEEN OTHER PROBLEMS/COMPLAINTS ABOUT THE SAME THING THAT HAPPENED TO MINE. I REALLY THINK SOMETHING SHOULD BE DONE ABOUT IT, TOYOTA SHOULD BE FIXING THE PROBLEM AND WE SHOULDN'T HAVE TO PAY FOR IT. HOPEFULLY SOMETHING GETS DONE ABOUT THIS. *TR
NHTSA ODI #10531528
11,380 miles · Jul 6, 2013
Power Train
THE BACK OF THE REAR DIFFERENTIAL HOUSING STARTED LEAKING ABOUT ONE DROP PER SECOND. THE VEHICLE HAS 113,800 MILES. WE BOUGHT THE CAR WITH ABOUT 20,000 MILES. IT HAS RECEIVED THE RECOMMENDED MAINTENANCE. THE SOURCE OF THE LEAK IS SEVERE CORROSION THAT HAS REMOVED MUCH OF THE STRUCTURAL METAL OF THE DIFFERENTIAL HOUSING. THE…
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THE BACK OF THE REAR DIFFERENTIAL HOUSING STARTED LEAKING ABOUT ONE DROP PER SECOND. THE VEHICLE HAS 113,800 MILES. WE BOUGHT THE CAR WITH ABOUT 20,000 MILES. IT HAS RECEIVED THE RECOMMENDED MAINTENANCE. THE SOURCE OF THE LEAK IS SEVERE CORROSION THAT HAS REMOVED MUCH OF THE STRUCTURAL METAL OF THE DIFFERENTIAL HOUSING. THE LEAK IS COMING THROUGH SEVERAL CRACKS THAT HAVE PASSED THROUGH THE REMAINING METAL. THE ONLY AVAILABLE REPAIR IS TO REPLACE THE ENTIRE REAR AXLE HOUSING TO THE TUNE OF BETWEEN $2000 AND $3000. THIS TYPE OF CORROSION IS UNUSUAL. I HAVE NOT EXPERIENCED THIS SORT OF MALFUNCTION IN NEARLY 50 YEARS OF DRIVING. *TR
NHTSA ODI #10523492
89,300 miles · Jul 1, 2013
Structure
TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE HAVING THE VEHICLE INSPECTED, HE WAS ADVISED THAT THE FRAME COMPLETELY RUSTED. THE VEHICLE WAS NOT REPAIRED AND THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 89,300. *TR
NHTSA ODI #10522722
128,000 miles · Jun 5, 2013
Structure
FRAME RUSTED THROUGH AT REAR NEAR MUFFLER. BOTTOM OF FRAME SECTION APPROXIMATELY 4" MISSING , INSIDE OF FRAME PERFORATED THROUGH APPROXIMATELY 18". REAR SUPPORT ROD STRUCTURAL INTEGRITY COMPROMISED. VEHICLE WAS PURCHASED NEW FROM LOCAL DEAL (LYNCH TOYOTA, MANCHESTER CT) AND IS ONE OWNER GARAGED AND MAINTAINED. CONTACTED TOYO…
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FRAME RUSTED THROUGH AT REAR NEAR MUFFLER. BOTTOM OF FRAME SECTION APPROXIMATELY 4" MISSING , INSIDE OF FRAME PERFORATED THROUGH APPROXIMATELY 18". REAR SUPPORT ROD STRUCTURAL INTEGRITY COMPROMISED. VEHICLE WAS PURCHASED NEW FROM LOCAL DEAL (LYNCH TOYOTA, MANCHESTER CT) AND IS ONE OWNER GARAGED AND MAINTAINED. CONTACTED TOYOTA AND LOCAL DEALER. BOTH UNWILLING TO TAKE ANY ACTION. NO RECALL ON THIS VEHICLE. *TR
NHTSA ODI #10515146
109,000 miles · Apr 26, 2013
Air BagsElectrical System
MY FUSE FOR MY WINDOWS BLEW, THEN WE FOUND OUT THAT MY WIRING HARNESS IN THE BACKSEAT HAD BURNED UP. FURTHER INSPECTION REVEALED THAT THE MAIN WIRING HARNESS WAS ALSO FRIED. THREE DIFFERENT MECHANICS DETERMINED THAT THE CAUSE WAS A MALFUNCTION OF THE AIRBAG WIRING. THERE WAS NO SIGN OF WEAR AND TEAR OR OUTSIDE INFLUENCE. THE AIR…
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MY FUSE FOR MY WINDOWS BLEW, THEN WE FOUND OUT THAT MY WIRING HARNESS IN THE BACKSEAT HAD BURNED UP. FURTHER INSPECTION REVEALED THAT THE MAIN WIRING HARNESS WAS ALSO FRIED. THREE DIFFERENT MECHANICS DETERMINED THAT THE CAUSE WAS A MALFUNCTION OF THE AIRBAG WIRING. THERE WAS NO SIGN OF WEAR AND TEAR OR OUTSIDE INFLUENCE. THE AIRBAGS CREATED THE PROBLEM, ARE NOW COMPROMISED AND ARE COMPLETELY UNSAFE. I CAN NO LONGER DRIVE THE CAR AND EVEN IF REPAIRED, THE AIRBAGS ARE NOW COMPROMISED FOREVER RENDERING THE CAR USELESS. TOYOTA DENIES ANY RESPONSIBILITY. THEY CLAIM THAT THE CAR IS TOO OLD TO BE THEIR PROBLEM. THIS IS A MAJOR SAFETY ISSUE THAT NEEDS ATTENTION SO THAT NOBODY ELSE HAS THE SAME EXPERIENCE OR WORSE, IS KILLED DUE TO AIRBAGS DEPLOYING AT WILL. *TR
NHTSA ODI #10509700
112,000 miles · Dec 28, 2012
Structure
MY 2001 4RUNNER VEHICLE WILL NOT PASS INSPECTION DUE TO CORROSION, ACTUAL HOLES AND SOFT SPOT, ON THE REAR PART OF THE FRAME IN THE MUFFLER AREA. CONCERNED WITH FAILURE WHEN TOWING 300 LBS TRAILER. NO OTHER ISSUES WITH THE VEHICLE, 112K MILES AND BOUGHT NEW 11 YEARS OLD. ONLY DETECTING THE PROBLEM NOW. SHOULD NOT BE NEEDING …
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MY 2001 4RUNNER VEHICLE WILL NOT PASS INSPECTION DUE TO CORROSION, ACTUAL HOLES AND SOFT SPOT, ON THE REAR PART OF THE FRAME IN THE MUFFLER AREA. CONCERNED WITH FAILURE WHEN TOWING 300 LBS TRAILER. NO OTHER ISSUES WITH THE VEHICLE, 112K MILES AND BOUGHT NEW 11 YEARS OLD. ONLY DETECTING THE PROBLEM NOW. SHOULD NOT BE NEEDING TO REPLACE FRAME. COST ESTIMATE $10K, SHOPPING AROUND FOR BETTER PRICING. COST TO REPAIR 40% OF THE ORIGINAL PURCHASE PRICE OR TWICE WHAT THE VEHICLE BOOKS TODAY. CONTACTED TOYOTA AND THEY WILL NOT EVEN DISCLOSE # OF COMPLAINT ON THIS ISSUE. THEIR ONLY COMMENTS IS THERE IS NO RECALL AT THIS TIME. FINDING NUMEROUS PEOPLE EXPERIENCING THE SAME ISSUE. *TR
NHTSA ODI #10490369
132,500 miles · Nov 17, 2012
Engine And Engine CoolingPower Train
AFTER I MY MECHANIC REPLACED THE CATALYTIC CONVERTER FOR $1500.00, THIS PROBLEM BEGAN. THE VEHICLE BEGAN TO BUCK (JERK VIOLENTLY) AS I WAS ACCELERATING TO 45 MPH. IT ALWAYS HAPPENS AT ABOUT 20 MPH AS I TRY TO ACCELERATE TO 30, 35 OR 40 MPH. THE ENGINE REVS UP TO 3 OF 4K BEFORE THE TRANSMISSIONS ENGAGES FORCEFULLY. THIS HAS B…
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AFTER I MY MECHANIC REPLACED THE CATALYTIC CONVERTER FOR $1500.00, THIS PROBLEM BEGAN. THE VEHICLE BEGAN TO BUCK (JERK VIOLENTLY) AS I WAS ACCELERATING TO 45 MPH. IT ALWAYS HAPPENS AT ABOUT 20 MPH AS I TRY TO ACCELERATE TO 30, 35 OR 40 MPH. THE ENGINE REVS UP TO 3 OF 4K BEFORE THE TRANSMISSIONS ENGAGES FORCEFULLY. THIS HAS BEEN GOING ON FOR NOW 3 MONTHS. *TR
NHTSA ODI #10485031
141,460 miles · Oct 3, 2012
Power Train
TOYOTA 2001 4-RUNNER, THE VEHICLE HAS AN EXCESSIVE AMOUNT OF UNDERBODY,FRAME,DRIVE TRAIN RUST SPECIFICALLY THE REAR DIFFERENTIAL HOUSING UNIT. THE PROBLEM FIRST ENCOUNTERED WAS THE RR. DIFFERENTIAL HOUSING RUSTED THROUGH AND IS LEAKING OIL FROM IT.SO I CALLED TOYOTA EXECUTIVE OFFICE AND SPOKE WITH AN EXECUTIVE ANAL…
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TOYOTA 2001 4-RUNNER, THE VEHICLE HAS AN EXCESSIVE AMOUNT OF UNDERBODY,FRAME,DRIVE TRAIN RUST SPECIFICALLY THE REAR DIFFERENTIAL HOUSING UNIT. THE PROBLEM FIRST ENCOUNTERED WAS THE RR. DIFFERENTIAL HOUSING RUSTED THROUGH AND IS LEAKING OIL FROM IT.SO I CALLED TOYOTA EXECUTIVE OFFICE AND SPOKE WITH AN EXECUTIVE ANALYST, I EXPLAINED IN DETAIL WHAT THE PROBLEM WAS , SHE ARRANGED FOR THE VEHICLE TO BE TAKEN TO A TOYOTA DEALER AND INSPECTED BY THEIR MECHANICS AND THE REPORT READS AS FOLLOWS. INSPECTED REAR DIFFERENTIAL , INSPECTED HOUSING -FOUND FLUID LEAKING FROM HOUSING AT YOKE THROUGH REAR COVER ;METAL POROUS AND THIN. RECOMMENDED REPLACEMENT OF HOUSING AND ASSOCIATED HARDWARE REPAIR ESTIMATE $1491.28 PLUS TAX. THEY ALSO NOTED SEVERAL OTHER ISSUES THAT I CANNOT BE SURE IF IT WAS CAUSED BY EXCESSIVE RUST OR NORMAL WEAR. THEN UNDER MISCELLANEOUS A GENERAL INSPECTION, BY TECHNICIAN READS AS FOLLOWS VEHICLE UNDERCARRIAGE HAS HEAVY CORROSION - - FOUND PERFORATION AT FRONT SHACKLE ON RIGHT REAR OF FRAME. SECOND PROBLEM, AT THE END OF THE INSPECTION REPORT UNDER THE COMMENTS SECTION THE TECHNICIAN, HAND WRITTEN SAID FRAME IS BAD,RUST PERFORATION (SLOPPY WRITING ) I BELIEVE IT SAID, RIGHT REAR RAIL . SO AFTER THE EXECUTIVE ANALYST READ THE REPORT SHE CALLED ME AND SAID THERE IS NOTHING TOYOTA CAN DO BECAUSE THE VEHICLE IS OUT OF WARRANTY AND THERE ARE NO RECALLS. I RESEARCHED ON LINE FOR EXCESSIVE RUST AND RR. DIFF. LEAKING, AND FOUND MANY OTHER VEHICLES HAVE A LOT OF THE SAME PROBLEMS DEVELOPING. THANK YOU *TR
NHTSA ODI #10478558
113,462 miles · Oct 1, 2012
Structure
SEVERELY RUSTY FRAME. MY 4RUNNER ONLY HAS A LITTLE OVER 114K MILES ON IT. IT SHOULDN'T HAVE ANYWHERE NEAR THE AMOUNT OF RUST ON THE FRAME. IT'S EVERYWHERE AND FLAKES OFF TO THE TOUCH. *TR
NHTSA ODI #10478187
145,000 miles · Aug 23, 2012
Power TrainStructure
MY VEHICLE HAS VERY LITTLE RUST EXCEPT FOR THE REAR DIFFERENTIAL. LARGE FLAKES OF RUST HAVE FORMED. THE DIFFERENTIAL RECENTLY BEGAN LEAKING. AFTER SEARCHING ONLINE I SEE THIS IS A COMMON PROBLEM WITH 4RUNNERS. *TR
NHTSA ODI #10471996