Structure. Review the 278 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Suspension. Review the 109 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Service Brakes. Review the 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

17 crash reports0 fire reports8 injury reports

Engine And Engine Cooling complaints

14 reports

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134,000 miles · Feb 18, 2015

Engine And Engine Cooling

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I BOUGHT MY 2003 TOYOTA 4RUNNER LESS THAN A YEAR AGO FROM AN AUTO GROUP (TOYOTA, HONDA, ECT) AND HAD THEM PERFORM A SAFETY INSPECTION. SINCE IT WAS USED I KNEW THERE WOULD BE SOME ISSUES, THE ONLY PROBLEM IT HAD WAS THE RECOMMENDED SERVICE WASN'T COMPLETED AT 90K MILES (TIMING BELT, WATER PUMP, ECT). I WORKED THAT INTO THE DEAL AN WAS ON MY WAY. AFTER DEPARTING THE U.S. AND SHIPPING MY CAR TO HAWAII, THE INSPECTORS HERE FOUND A LOT OF RUST ON THE FRAME AND SAID IT COULD BE AN ISSUE GETTING AN APPROVED SAFETY INSPECTION (REQUIRED FOR REGISTERING THE CAR IN HAWAII). THEY SAID IT ISN'T SEVERE NOW, BUT CAN BE LIVING IN THIS STATE AS IT IS VERY RUSTED AND WILL CONTINUE TO DO SO IN SUCH A HUMID ENVIRONMENT. THEY ALSO SAID THAT TACOMAS FOR THAT YEAR HAD A RECALL DUE TO EXCESSIVE FRAME RUST (SIMILAR IF NOT THE SAME FRAMES) BUT 4RUNNERS DO NOT, SO THEY RECOMMENDED I TALK TO TOYOTA ABOUT IT. I CALLED THE TOYOTA SERVICE CENTER HERE AND THEY SAID THERE IS NO RECALL AND IF I WANTED THE FRAME FIXED OR REPLACED, IT'D HAVE TO BE AT MY EXPENSE. TOYOTA'S ARE FANTASTIC VEHICLES, I JUST HOPE THIS COMMENT AIDS IN THEIR DECISION TO APPROVE A RECALL ON 4RUNNER'S FRAMES DUE TO RUST LIKE THE OTHER MAKES FOR THE SAME YEAR. *TR

NHTSA ODI #10683968

120,750 miles · Apr 7, 2014

Engine And Engine CoolingStructure

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WHILE IN PROCESS OF REPLACING SERPENTINE BELT AND IDLER PULLEYS ON ENGINE, I NOTICED (AFTER REMOVING LOWER ENGINE SHIELD UNDER VEHICLE) SIGNIFICANT RUST DAMAGE TO FRONT FRAME SEGMENT UNDER RADIATOR SUPPORT. THE RIGHT SIDE TOW HOOK AND CORNER OF FRAME IT WAS MOUNTED TO FELL OFF IN MY HAND WHEN I TOUCHED IT. UPON FURTHER INSPECTION, THERE ARE OTHER PARTS OF VEHICLE FRAME WITH RUST DAMAGE, THOUGH NONE APPEAR TO BE AS SEVERE AS AREA OF FRAME UNDERNEATH RADIATOR. THIS PORTION OF FRAME APPEARS TO CONNECT THE TWO SIDE FRAME RAILS TOGETHER. *TR

NHTSA ODI #10577916

20,000 miles · Jul 1, 2011

Engine And Engine Cooling

TL* THE CONTACT OWNS A 2003 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHEN DRIVING ABOVE 25 MPH, THE CHECK ENGINE LIGHT WOULD ILLUMINATE ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED…

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NHTSA ODI #10410206

100,000 miles · Jun 8, 2011

Engine And Engine Cooling

TL* THE CONTACT OWNS A 2003 TOYOTA 4RUNNER. THE CONTACT STATED THAT THE VSC TRACKING LIGHT ILLUMINATED, CAUSING THE VEHICLE TO VIOLENTLY JERK WHEN APPLYING PRESSURE TO THE BRAKES. NEITHER THE DEALER NOR MANUFACTURER HAD BEEN NOTIFIED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE CURRENT AND FAILURE MILEAGES WERE 100,000. T…

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NHTSA ODI #10405662

Mileage unknown · Feb 16, 2011

Engine And Engine CoolingVehicle Speed ControlCrashInjury

THE CHECK ENGINE LIGHT CAME ON AND THE VSC TRAC TURNED OFF, THE DAY AFTER THE LIGHT CAME ON AND THE TRACTION TURNED OFF...THE TOYOTA 2003 4RUNNER FLIPPED OVER. THE VSC TRACTION SHOULD NOT BE TURNED OFF WHEN A CHECK ENGINE LIGHT COMES ON BECAUSE IT PROVIDES THE NECESSARY STABILITY OF THE VEHICLE THAT A SUV NEEDS NO MATTER WHAT IS…

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NHTSA ODI #10382875

94,500 miles · Jul 25, 2010

Engine And Engine Cooling

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BOUGHT A 2003 TOYOTA 4RUNNER V6 4WD 2 1/2 YEARS AGO AS A TOYOTA CERTIFIED USED VEHICLE..WITHIN A YEAR I NEEDED A NEW SERPENTINE BELT DUE TO EXCESSIVE NOISE AT START UP. THE DEALER TOLD ME THERE WAS A TSB FOR THIS AND TO BRING THE CAR BACK IF I HAD FURTHER ISSUES. THE NOISE CAME BACK BUT WAS IRREGULAR, IT WOULD COME AT START UP EVERY DAY FOR A COUPLE WEEKS AND THEN DISAPPEAR FOR ANOTHER FEW WEEKS. THE NOISE GOT LOUDER AND SOUNDED SOMEWHAT DIFFERENT A COUPLE WEEKS AGO. BROUGHT IT TO THE DEALER AND THEY REPLACED THE IDLER PULLEY ON FRIDAY 07/16/10. IT SOUNDED LOUD AGAIN AT START UP AFTER I PICKED UP THE VEHICLE BUT THE NOISE EVENTUALLY WENT AWAY. HOWEVER MY SERPENTINE BELT ACTUALLY RIPPED LESS THAN A WEEK LATER (07/21/10) WHILE I WAS DRIVING 45MPH ON A CURVY ROAD. I FIRST LOST MY AC, QUICKLY FOLLOWED BY MY POWER STEERING...SOMEHOW MANAGED TO PULL OVER BUT BY THEN SMOKE WAS COMING FROM UNDERNEATH THE HOOD DUE TO THE FACT THAT IN THE RIPPING PROCESS THE BELT BROKE A COOLANT HOSE. I HAVE BEEN WITHOUT A VEHICLE FOR 5 DAYS NOW AND AM WAITING ON THE DEALER TO GET A NEW HOSE SO THAT THEY CAN ACTUALLY RUN THE CAR AND MAKE SURE THE PULLEYS ARE ALL OK. HOWEVER SO FAR THEY'RE TELLING ME THAT ALL THE PULLEYS ARE FINE AND I AM HAVING TO FIGHT WITH THEM TO GET THEM TO DO THE RECOMMENDED FIX TO THE TSB EG012-13. A NOISE AT START IS ONE THING, BUT A YEAR AND 1/2 OLD BELT ACTUALLY RIPPING IS NOT NORMAL! I WAS FORTUNATE TO COME OUT OF THIS UNHARMED AND NOT DAMAGE MY CAR OR SOMEBODY ELSE'S. *TR

NHTSA ODI #10345156

20,000 miles · Feb 24, 2010

Engine And Engine Cooling

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TOYOTA 4-RUNNER 2003 SIX CYLINDER. EXCESSIVE SULFUR DIOXIDE ODOR. NO EVENTS LEADING UP TO FAILURE. SPORADIC. DEALERSHIPS GAVE ME A HARD TIME, WANTED $150.00 TO RUN TEST EVEN THOUGH TOYOTA HEADQUARTERS INFORMED ME THAT THE DEALER SHOULD JUST REPLACE PARTS, SO I NEVER HAVE HAD IT FIXED BUT I AM CONCERNED. I CHANGED GAS STATIONS NUMEROUS TIMES AND STILL RECEIVE THE ODOR. ODOR COMES AND GOES AND CAN BE STRONG AT TIMES ESPECIALLY IN COLD MONTHS. CONCERNS ARE THAT IT WILL BECOME WORSE AND THE SMELL IS TOXIC. *TR

NHTSA ODI #10313782

100,400 miles · Feb 10, 2010

Engine And Engine Cooling

2003 TOYOTA 4RUNNER SPORT ED, 6 CYL.- AT 100,400 MILES, BOTH MY CATALYTIC CONVERTERS WENT OUT. ALSO THE CHECK ENGINE LIGHT GOES ON WHICH DISENGAGES THE VEHICLE SKID CONTROL, SO I HEAR. REPAIRS ARE COSTLY. CAN'T SMOG CAR ON THE FIRST TIME CAR EVER NEEDS TO GET SMOGGED. SEEMS LIKE A RECALL ISSUE TO ME? *TR

NHTSA ODI #10308607

35,000 miles · Feb 9, 2010

Engine And Engine Cooling

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MODEL : 2003 TOYOTA 4 RUNNER V8 ISSUE : AUTOMATIC ACCELERATION WHILE A/C ON HOW TO DUPLICATE THE ISSUE : OPTION 1] WHILE THE ENGINE IS RUNNING AND THE VEHICLE IS IN DRIVE WITH BRAKES DEPRESSED TURN THE A/C "ON", THE VEHICLE WOULD TRY TO SUDDENLY MOVE FORWARD. THE TACHOMETER ALSO SHOWS HIGHER READINGS. OPTION 2] TURN YOUR A/C OFF DRIVE FOR A WHILE AND THEN TURN YOUR A/C ON, THE MOMENT YOU TURN YOUR A/C ON THE VEHICLE ACCELERATES ON ITS OWN FOR A WHILE. THIS PROBLEM IS MAGNIFIED ESPECIALLY IN SUMMER AND HOTTER CLIMATES AND DOES NOT FAIL TO OCCUR IN SUMMER. *TR

NHTSA ODI #10307895

Mileage unknown · Jan 29, 2010

Engine And Engine Cooling

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MY VEHICLE SEEMED TO BECOME LOUDER WHEN IDLING OVER THE PAST 2 YEARS THAT I'VE OWNED IT. A COUPLE MONTHS AGO I NOTICED IT BEING NOTICEABLY MUCH LOUDER. THE NOISE COULD BE HEARD WHILE IDLING (RED LIGHT, DRIVE THRUS...) AND WOULD BECOME LOUDER WITH ACCELERATION UP TO ABOUT 40MPH. THIS WAS A RATTLING NOISE LOCATED ON THE DRIVER'S SIDE OF THE UNDERBODY, SOMEWHERE BETWEEN THE DRIVER'S AND THE PASSENGER'S SEATS. IT SOUNDED LIKE LOUD HEAVY VIBRATIONS, METAL ON METAL. I ASKED THE TOYOTA DEALERSHIP SERVICE DEPARTMENT TO CHECK OUT AND THEY FOUND THAT THE HEATSHIELD WAS SERIOUSLY RUSTED. THEY HAD TO ORDER THE PART IN ORDER TO REPLACE IT BUT SAID IT WAS RUSTED SO BADLY THAT THEY HAD TO REMOVE WHAT WAS LEFT OF THE ORIGINAL HEATSHIELD TO PREVENT FURTHER DAMAGE TO OTHER COMPONENTS. ONCE THE NEW PART WAS RECEIVED THEY WERE ABLE TO PUT ON THE NEW HEATSHIELD. *TR

NHTSA ODI #10303200

Official recalls

11V113000 · Vehicle Speed Control:accelerator Pedal

Feb 24, 2011

TOYOTA IS RECALLING CERTAIN MODEL YEAR 2008 THROUGH 2011 LEXUS LX570, 2003 THROUGH 2009 TOYOTA 4RUNNER, AND 2006 THROUGH 2010 RAV4 VEHICLES. THE ACCELERATOR PEDAL CAN GET STUCK IN THE WIDE OPEN POSITION DUE TO ITS BEING TRAPPED BY AN UNSECURED OR INCOMPATIBLE DRIVER'S FLOOR MAT.

Consequence & remedy

Consequence: A STUCK OPEN ACCELERATOR PEDAL MAY RESULT IN VERY HIGH VEHICLE SPEEDS AND MAKE IT DIFFICULT TO STOP THE VEHICLE, WHICH COULD CAUSE A CRASH, SERIOUS INJURY OR DEATH.

Remedy: THE REMEDY IS NOW AVAILABLE. THE SAFETY RECALL BEGAN EARLY APRIL 2011. THE REMEDY WILL INVOLVE MODIFICATION OR REPLACEMENT OF THE ACCELERATOR PEDAL AND REPLACEMENT OF ANY TOYOTA ALL-WEATHER FLOOR MAT. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331 OR LEXUS AT 1-800-255-3987.

03V146000 · Fuel System, Gasoline

Apr 14, 2003

ON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH V6 ENGINES, THE FUEL PULSATION DAMPER, LOCATED ON THE FUEL RAIL, MAY HAVE BEEN IMPROPERLY ASSEMBLED, CAUSING A DIAPHRAGM IN THE PULSATION DAMPER TO BE DAMAGED. IF THE DIAPHRAGM FAILS, FUEL MAY LEAK.

Consequence & remedy

Consequence: THIS COULD RESULT IN AN ENGINE COMPARTMENT FIRE IF A HEAT SOURCE OR AN IGNITION SOURCE IS PRESENT.

Remedy: DEALERS WILL REPLACE THE PULSATION DAMPER. OWNER NOTIFICATION BEGAN MAY 5, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT TOYOTA AT 1-800-331-4331.

02V339000 · Wheels

Dec 17, 2002

ON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH FIVE FACTORY ALLOY WHEELS (MODEL 6934 AND 6936), WITH FACTORY LLAT, AND WITH PORT INSTALLED WR4, FOUR ALLOY WHEEL UPGRADE PROCESSED AT THE JACKSONVILLE, FLORIDA PORT AND DISTRIBUTED BY SOUTHEAST TOYOTA DISTRIBUTORS IN THE STATES OF ALABAMA, FLORIDA, GEORGIA, NORTH AND SOUTH CAROLINA, WHEN THE VEHICLES WERE PROCESSED AT THE PORT, AN ALLOY TIRE/WHEEL UPGRADE WAS INSTALLED. THE UPGRADE INCLUDED 4 ALLOY WHEELS. THE ORIGINAL SPARE TIRE/ALLOY WHEEL WAS NOT CHANGED. THE SPARE TIRE REQUIRES THE USE OF A DIFFERENT STYLE OF WHEEL NUT TO ATTACH IT TO THE VEHICLE.

Consequence & remedy

Consequence: IF THE SPARE TIRE/WHEEL IS INSTALLED ON THE VEHICLE USING THE WHEEL NUTS PROVIDED FOR THE UPGRADE ALLOY WHEEL, DAMAGE TO THE WHEEL COULD RESULT AND COULD EVENTUALLY LEAD TO A LOOSE WHEEL.

Remedy: OWNERS WILL BE PROVIDED WITH DIFFERENT STYLE LUG NUTS, A WARNING LABEL FOR THE SPARE RE/ALLOY WHEEL, AND AN OWNER'S MANUAL ADDENDUM.

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

DP18002 · Frame Corrosion

Opened Aug 17, 2018 · Closed Mar 18, 2022

Status: closed (inferred from source dates) · Structure:frame And Members

On August 7, 2018, the Office of Defects Investigation (ODI) received a defect petition from Mr. Gary Weinreich alleging premature frame corrosion failure in model year (MY) 2002 - 2006 Toyota 4Runner vehicles. The petitioner based his request upon a corrosion-related front suspension failure he experienced in his MY 2005 Toyota 4Runner, a class action lawsuit settlement involving other Toyota products, and other complaints of underbody corrosion in Toyota 4Runner vehicles that he found in NHTSA?s online complaint database. The petitioner submitted a complaint to NHTSA documenting his experience (NHTSA ID 11098055). On August 17, 2018, ODI opened DP18-002 to evaluate the petitioner?s request. ODI?s evaluation included information provided by the petitioner regarding his vehicle, facts related to the class action lawsuit cited by the petitioner, and consumer complaint data received by NHTSA regarding underbody corrosion in third and fourth-generation Toyota 4Runner vehicles.The undercarriage of the petitioner?s vehicle exhibited severe corrosion damage indicative of seawater immersion. The vehicle?s service history shows that concerns with underbody corrosion were first noted by a Toyota dealer in a multi-point vehicle inspection performed on April 28, 2011. The invoice for that inspection noted ?severe and excessive amount of rust on the undercarriage and on the drive shaft transmission.? Two years later, on October 21, 2013, another multi-point inspection by a Toyota dealer observed further progression of underbody corrosion damage, noting: ?rust on shocks/struts and other components,? ?rust on exhaust system,? ?both splash shields severely rusted,? and ?undercarriage very rusty.? On July 17, 2017, approximately 10 months prior to experiencing the suspension failure incident, an independent repair facility performing routine oil change and brake maintenance informed the Petitioner of a concern with ?excessive frame corrosion? on his vehicle. The service history, severe general corrosion damage, failure age, and environment do not support the petitioner?s allegation of premature corrosion failure.ODI?s analysis of NHTSA complaint data identified fifteen incidents of front lower control arm failure in fourth-generation Toyota 4Runner sport utility vehicles. Two of the failures, including the petitioner?s vehicle, involve vehicles operated in ocean front communities with continuous exposure to aerosolized marine salts and potential exposure to seawater immersion. The remaining thirteen failures all involved vehicles owned or previously registered in states with the greatest use of deicing salts to treat road surfaces in winter months (?Salt states?). On average, the front lower control arm failures occurred after 13.1 years in service in highly corrosive environments. The failure ages and environments do not support the petitioner?s allegation of premature corrosion failure. NHTSA is authorized to issue an order requiring notification and remedy of a defect if the Agency?s investigation shows a defect in design, construction, or performance of a motor vehicle that presents an unreasonable risk to safety. 49 U.S.C. ?? 30102(a)(9), 30118. Since the information before the Agency is not indicative of a vehicle-based defect, it is unlikely that any investigation opened because of granting this petition would result in an order concerning the notification and remedy of a safety-related defect. Therefore, upon full consideration of the information presented in the petition and the potential risks to safety, the petition is denied. The denial of this petition does not foreclose the Agency from taking further action if warranted or the p

RQ10003 · Unintended And Uncontrolled Acceleration

Opened Feb 16, 2010 · Closed Mar 1, 2011

Status: closed (inferred from source dates) · Electrical System:software; Vehicle Speed Control:accelerator Pedal

On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.

Additional source detail variants (6)

Electrical System:software

Vehicle Speed Control:accelerator Pedal