LEFT SIDE FRAME ROTTED OUT. *TR
2001 Toyota 4RUNNER
Owner reports · Recalls · Investigations
More warning signs than most 4RUNNER years
Owner complaints for the 2001 Toyota 4RUNNER are substantially higher than the model-year median of 58.
About this comparison →How this year compares
Owner complaints by model year
Compare all 4RUNNER 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
134 reports with mileage · 20 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.
- Structure. Review the 79 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Suspension. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
154 reportsTHE UNDER CARRIAGE HAS BEEN RUSTING SINCE I NOTICED APPROX. 4 YRS AFTER PURCHASE. I NOW HAVE BEEN UNABLE TO PASS INSPECTION OR DRIVE VEHICLE SINCE ENTIRE UNDER CARRIAGE IS COMPLETELY RUSTED OUT. WHEN ATTEMPT WAS MADE TO PLACE ON LIFT TO OBSERVE IT BEGAN TO CRACK OR SPLIT . I HAVE ONLY 87000 MILES ON IT AND THE REST OF VEHICLE IS…
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THE UNDER CARRIAGE HAS BEEN RUSTING SINCE I NOTICED APPROX. 4 YRS AFTER PURCHASE. I NOW HAVE BEEN UNABLE TO PASS INSPECTION OR DRIVE VEHICLE SINCE ENTIRE UNDER CARRIAGE IS COMPLETELY RUSTED OUT. WHEN ATTEMPT WAS MADE TO PLACE ON LIFT TO OBSERVE IT BEGAN TO CRACK OR SPLIT . I HAVE ONLY 87000 MILES ON IT AND THE REST OF VEHICLE IS CLEAN AND BASICALLY RUST FREE. IT IS MARCH 27 , 2015 AND HAS BEEN SITTING IN DRIVEWAY FOR LAST 3 YRS. THE TOYOTA DEALERSHIP IN WAPPINGERS FALLS STATED THAT TOYOTA IS PLANNING ON REPAIRING BUT IS UNCERTAIN AS TO WHEN. AT PRESENT THE BACK PARKING LOT IS FILLED WITH NEW UNDER STRUCTURES FOR OTHER MODELS.I WOULD LIKE TO KNOW WHEN THIS ONGOING TERRIBLE AND DANGEROUS PROBLEM WILL BE REPAIRED. *TR
TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE EXITING OUT OF A PARKING SPACE, THERE WAS AN OIL STAIN ON THE GROUND. THE CONTACT NOTICED THAT THE OIL WAS LEAKING FROM THE REAR DIFFERENTIAL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE …
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TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE EXITING OUT OF A PARKING SPACE, THERE WAS AN OIL STAIN ON THE GROUND. THE CONTACT NOTICED THAT THE OIL WAS LEAKING FROM THE REAR DIFFERENTIAL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 98,528.
VEHICLE HAS A FRAME THAT IS RUSTED ON PASSENGER SIDE AND WAS TOLD BY A MECHANIC ON 3/20/15 THAT IT SHOULD BE IN A RECALL ASAP. DIFFERENTIAL COVER IS A RUSTED BULLET AND IS LEAKING. THERE IS NO CHANGING IT AS COVER IS A SOLID WELD NO BOLTS TO TAKE OFF TO CHANGE COVER. BRILLIANT IDEA BY TOYOTA. *TR
THE FRAME ON MY 4RUNNER WILL NOT PASS INSPECTION DUE TO RUST, WHICH I NEED TO REPAIR. THE VEHICLE DOES NOT HAVE MUCH MILES ON IT AND SHOULD NOT RUST LIKE IT DID FROM THE INSIDE. THE RUST IS FROM THE INSIDE, WHICH MAKES IT VERY DANGEROUS TO HAVE ON THE ROAD ESPECIALLY IN STATES WHERE AN INSPECTION IS NOT REQUIRED. IT COULD EASILY…
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THE FRAME ON MY 4RUNNER WILL NOT PASS INSPECTION DUE TO RUST, WHICH I NEED TO REPAIR. THE VEHICLE DOES NOT HAVE MUCH MILES ON IT AND SHOULD NOT RUST LIKE IT DID FROM THE INSIDE. THE RUST IS FROM THE INSIDE, WHICH MAKES IT VERY DANGEROUS TO HAVE ON THE ROAD ESPECIALLY IN STATES WHERE AN INSPECTION IS NOT REQUIRED. IT COULD EASILY GO UNNOTICED UNTIL IT IS TOO LATE, AND SOMEBODY COULD GET HURT OR KILLED WHEN THE FRAME FAILS. *TR
ON THE REAR END DIFFERENTIAL HOUSING, THE BACK COVER AREA (NON REPLACEABLE) HAS BECOME SO POROUS BECAUSE OF HEAVY RUST SCALING AND FLAKING THAT DIFFERENTIAL FLUID SEEPS FROM IT. THE REST OF THE DIFFERENTIAL HOUSING IS MADE OF THICKER, HEAVIER GAUGE METAL AND SEEMS OK. THIS ISSUE WILL CAUSE THE GEAR OIL TO DROP BELOW THE REQUIRED…
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ON THE REAR END DIFFERENTIAL HOUSING, THE BACK COVER AREA (NON REPLACEABLE) HAS BECOME SO POROUS BECAUSE OF HEAVY RUST SCALING AND FLAKING THAT DIFFERENTIAL FLUID SEEPS FROM IT. THE REST OF THE DIFFERENTIAL HOUSING IS MADE OF THICKER, HEAVIER GAUGE METAL AND SEEMS OK. THIS ISSUE WILL CAUSE THE GEAR OIL TO DROP BELOW THE REQUIRED LEVEL CAUSING DIFFERENTIAL FAILURE OR LOCK UP AND AT HIGHWAY SPEEDS COULD BE DISASTROUS. WHEN I REALIZED I HAD THIS PROBLEM, I SEARCHED THE TOYOTA FORUMS ONLINE AND IT APPEARS TO BE A VERY COMMON ISSUE WITH THESE VEHICLES AND TOYOTA IS AWARE BUT WILL DO NOTHING ABOUT IT. THEY WILL REPLACE ENTIRE RUSTED OUT FRAMES ON TRUCKS UNDER RECALL, BUT REFUSE TO ADDRESS THIS ISSUE? TO ADD INSULT TO INJURY THEY WANT $3000 TO REPLACE A KNOWN INFERIOR/DEFECTIVE PART. I HAVE HAD TO RESORT TO MAKESHIFT REPAIRS USING BRUSH ON BED LINER TO STEM THE LEAKING AND CHECK THE FLUID TO KEEP IT FULL. BUT WHAT ABOUT PEOPLE WHO ARE NOT MECHANICALLY INCLINED OR WHO ARE COMPLETELY UNAWARE?
TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE HAVING MAINTENANCE PERFORMED, THE TECHNICIAN NOTIFIED THE CONTACT THAT THE FRAME WAS ROTTED DUE TO EXCESSIVE CORROSION. THE DEALER WAS CONTACTED AND MADE AWARE OF THE FAILURE. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 204,…
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TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE HAVING MAINTENANCE PERFORMED, THE TECHNICIAN NOTIFIED THE CONTACT THAT THE FRAME WAS ROTTED DUE TO EXCESSIVE CORROSION. THE DEALER WAS CONTACTED AND MADE AWARE OF THE FAILURE. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 204,507.
ON ROUTINE CHECK AND INSPECTION, TOYOTA ARLINGTON AND TOYOTA SCHAUMBURG CALLED MY ATTENTION REGARDING A PREMATURE RUSTING ON THE UNDERBODY FRAME AND RESULTED IN A LINEAR HOLE BY THE REAR LEFT AND RIGHT PORTIONS OF THE VEHICLE. THIS ACCORDING TO THE SERVICE ADVISORS OF BOTH TOYOTA DEALERSHIPS MAY MAKE THE VEHICLE UNSAFE TO OPERAT…
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ON ROUTINE CHECK AND INSPECTION, TOYOTA ARLINGTON AND TOYOTA SCHAUMBURG CALLED MY ATTENTION REGARDING A PREMATURE RUSTING ON THE UNDERBODY FRAME AND RESULTED IN A LINEAR HOLE BY THE REAR LEFT AND RIGHT PORTIONS OF THE VEHICLE. THIS ACCORDING TO THE SERVICE ADVISORS OF BOTH TOYOTA DEALERSHIPS MAY MAKE THE VEHICLE UNSAFE TO OPERATE AND MAY RESULT TO UNCONTROLLED STABILITY DURING DRIVING. *TR
TL* THE CONTACT OWNS A 2001 TOYOTA 4RUNNER. THE CONTACT STATED THAT THE DIFFERENTIAL HOUSING CORRODED AND CAUSED FLUID TO LEAK. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 150,000.
ON OCTOBER 11TH 2014, I WAS DRIVING MY 2001 4RUNNER, ON MY WAY TO WORK. HAD JUST TURNED OFF A ROAD WITH A SPEED LIMIT OF 55. AS I HIT 35MPH, MY CAR COMES TO A JOLTING STOP WITH A LOUD BANG AND DRAG ON THE TIRES. THE CAR STILL RAN, BUT THE CAR WOULDN'T MOVE. I HAD TO FINISH WALKING TO MY JOB, AS I WAS CELLPHONE-LESS AT THE TIME. …
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ON OCTOBER 11TH 2014, I WAS DRIVING MY 2001 4RUNNER, ON MY WAY TO WORK. HAD JUST TURNED OFF A ROAD WITH A SPEED LIMIT OF 55. AS I HIT 35MPH, MY CAR COMES TO A JOLTING STOP WITH A LOUD BANG AND DRAG ON THE TIRES. THE CAR STILL RAN, BUT THE CAR WOULDN'T MOVE. I HAD TO FINISH WALKING TO MY JOB, AS I WAS CELLPHONE-LESS AT THE TIME. I HAD TO PAY TO HAVE MY CAR TOWED HOME, MISSING AN ENTIRE DAY'S WORK, WHICH WAS A LOSS OF 120$. THE GUY WHO TOWED ME TOLD ME IT WAS DEFINITELY SOMETHING TO DO WITH MY REAR END. SO I HAD A FAMILY FRIEND WHO IS A RETIRED MECHANIC LOOK IT OVER TO SEE IF HE COULD SPOT WHAT THE PROBLEM WAS. FIRST THING NOTICED WAS MY EMERGENCY BREAK WAS ON AND FROZEN. THEY REMOVE IT, CLEAN IT, PUT IT BACK ON. I START THE CAR, GO TO MOVE IT AND THERES A CONTINUOUS LOUD BANG AND THE CAR AGAIN COMES TO THE STOP. THE EMERGENCY BREAK FROZE AGAIN. THEY ONCE AGAIN TAKE IT OFF, AND SO FAR IT HASN'T REFROZE. HOWEVER, MY CAR IS STILL MAKING THE LOUD BANGING NOISE COMING FROM THE REAR END, WHICH THEY HAVE CONCLUDED IS COMING FROM THE REAR DIFFERENTIAL HOUSING UNIT. WHICH THEY FOUND A DECENT SIZED HOLE IN, WHICH IT APPEARS SOMEONE TRIED TO COVER WITH A YELLOW GLUE TYPE SUBSTANCE. I JUST BOUGHT THE CAR, AND AM NOW CARLESS. AS I HAVE 2 SMALL CHILDREN, AND CANNOT AFFORD TO FIX A PROBLEM THAT CAN COST UP TO $3,000 TO FIX. LUCKILY I WAS ONLY GOING 35 MPH WHEN IT BROKE, AND THERE WAS NO ONE FOLLOWING BEHIND ME, OR I WOULD HAVE BEEN RE ENDED, AND HAD MORE TO FIX THAT I ALREADY DO. THIS IS A HUGE PROBLEM WITH THE MODEL CAR, AND TOYOTA REALLY NEEDS TO ISSUE A RECALL ON THE DIFFERENTIAL UNIT!!! IT'S FAIRLY DANGEROUS. I LOVED THIS CAR BEFORE THIS INCIDENT. BUT NOW IT'S USELESS TIL I CAN AFFORD THIS FIX. *TR
Official recalls
105V225000 · Suspension:front:control Arm:lower Ball Joint
May 17, 2005
ON CERTAIN SPORT UTILITY VEHICLES, DUE TO A MANUFACTURING ISSUE IN THE FRONT SUSPENSION LOWER BALL JOINT, THERE IS A POSSIBILITY THAT THE SURFACE OF THE BALL OF THE JOINT MAY HAVE BEEN SCRATCHED. THE BALL JOINT MAY EVENTUALLY EXPERIENCE EXCESSIVE WEAR AND LOOSENESS, RESULTING IN INCREASED STEERING EFFORT.
Consequence & remedy
Consequence: THE LOWER BALL JOINT MAY SEPARATE FROM THE KNUCKLE CAUSING LOSS OF STEERING CONTROL AND A CRASH COULD OCCUR.
Remedy: DEALERS WILL REPLACE THE FRONT SUSPENSION LOWER BALL JOINTS FREE OF CHARGE. THE RECALL BEGAN ON JULY 5, 2005. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331.
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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