NHTSA owner reports · September 18, 2026 snapshot.
Unknown Or Other complaints
60 reportsClear category filter18,500 miles · Feb 21, 2017
Unknown Or Other
MICE HAVE CHEWED THROUGH THE PLASTIC SCREEN OVER THE FRESH AIR INTAKE AND ENTERED MY RAV 4, SHREDDING EVERYTHING IN MY GLOVE BOX, SHREDDING THE CABIN AIR FILTER AND LEAVING FECES AND URINE THROUGHOUT THE VEHICLE (SEATS, FLOOR BOARDS, CLOSED COMPARTMENT WHERE SPARE TIRE IS KEPT AND OTHER AREAS UNKNOWN/UNABLE TO SEE BY ME) DEALER…
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MICE HAVE CHEWED THROUGH THE PLASTIC SCREEN OVER THE FRESH AIR INTAKE AND ENTERED MY RAV 4, SHREDDING EVERYTHING IN MY GLOVE BOX, SHREDDING THE CABIN AIR FILTER AND LEAVING FECES AND URINE THROUGHOUT THE VEHICLE (SEATS, FLOOR BOARDS, CLOSED COMPARTMENT WHERE SPARE TIRE IS KEPT AND OTHER AREAS UNKNOWN/UNABLE TO SEE BY ME) DEALER WAS CONTACTED, RAV WAS TAKEN IN AND DEALER WAS INITIALLY GOING TO INSTALL A METAL SCREEN TO PREVENT REENTRY BY RODENTS-WAS QUOTED $185. UPON THE MECHANIC INSPECTION, WE WERE TOLD THAT "PER TOYOTA GUIDELINES" THEY COULD NOT/ WOULD NOT INSTALL A BARRIER TO PREVENT RODENTS FROM GETTING INTO THE VEHICLE. THIS IS A SERIOUS ISSUE AS MICE CARRY HANTAVIRUS AND BOTH MY HUSBAND AND I COULD HAVE BEEN EXPOSED TO THIS TERRIBLE ILLNESS AS RODENT WASTE WAS MADE AIRBORNE WITHOUT OUR KNOWLEDGE OF THE INFESTATION INTO THE VENTILATING SYSTEM. TOYOTA SHOULD MAKE THE FRESH AIR INTAKE IMPENETRABLE BY RODENTS. I DID SOME RESEARCH ON THE COMPUTER AND FIND THAT OTHERS HAVE EXPERIENCED THIS DISGUSTING PROBLEM. SOME DEALERS WILL INSTALL A SCREEN AND OTHERS WILL NOT. THERE SHOULD BE SOME SORT OF SOLUTION TO THIS PROBLEM. I HAVE FOUR OTHER VEHICLES AND NONE OF THEM HAVE ANY RODENT INFESTATION.
NHTSA ODI #10956145
17,031 miles · Oct 27, 2016
StructureUnknown Or OtherCrashInjury
TAKATA RECALL. I WOULD LIKE MORE INVESTIGATION REGARDING WHEN A CAR IS REPAIR PER SPECIFICATION AND STATE LAW. HOW IS THAT A COMPANY TAKE CONTROL OF THE VALUE AND HISTORY OF THE CAR. BUT IS NOT REPORTED THE CORRECT WAY WHEN THE REPAIR IS DONE. AFFECTING THE OWNER OF THE VEHICLE.
NHTSA ODI #10919727
9,000 miles · May 3, 2016
Electrical SystemEngineUnknown Or Other
THE LIGHT ON THE CRUISE CONTROL STALK BLINKS AND IT IS VERY DISTRACTING AT NIGHT WHILE DRIVING. THEN THE CRUISE CONTROL STARTED DROPPING OUT WHILE DRIVING. NO WARNING LIGHTS OR CODES WERE STORED IN THE COMPUTER WHEN CHECKED BY THE DEALER. THE DEALER REPLACED THE CRUISE CONTROL SWITCH, BUT THE PROBLEM GOT WORSE. THE ENGINE STARTE…
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THE LIGHT ON THE CRUISE CONTROL STALK BLINKS AND IT IS VERY DISTRACTING AT NIGHT WHILE DRIVING. THEN THE CRUISE CONTROL STARTED DROPPING OUT WHILE DRIVING. NO WARNING LIGHTS OR CODES WERE STORED IN THE COMPUTER WHEN CHECKED BY THE DEALER. THE DEALER REPLACED THE CRUISE CONTROL SWITCH, BUT THE PROBLEM GOT WORSE. THE ENGINE STARTED SHUTTING OFF WHILE DRIVING ON THE HIGHWAY WITH A TOTAL LOSS OF ELECTRICAL POWER AND WOULD TAKE SEVERAL MINUTES BEFORE IT WOULD RESTART DUE TO NO ELECTRICAL POWER. THE DEALER THEN ADJUSTED THE SWITCH ON THE BRAKE PEDAL BUT IT DIDN'T HELP. THE RADIO/NAVIGATION SCREEN HAS SINCE LOCKED UP AND YOU HAVE TO RESTART THE CAR TO RESET IT. THE ENGINE WILL SOMETIMES SHUT OF FOR A FEW SECONDS AND THE RESTART ON ITS OWN WHILE DRIVING. WHEN THIS HAPPENS SEVERAL WARNING LIGHTS STAY ON (ABS, AIRBAGS, TRACTION CONTROL & ALL WHEEL DRIVE). THE LIGHTS DO NOT RESET UNTIL THE CAR IS TURNED OFF AND BACK ON BY THE KEY. I HAVE ALMOST BEEN INVOLVED IN 3 ACCIDENTS BECAUSE OF THESE PROBLEMS. THE CAR IS NOW IN THE SHOP AFTER CONTACTING THE MANUFACTURER SEVERAL TIMES ABOUT THE FAILURE OF THE DEALER TO REPAIR THE CAR AND THAT IT IS UNSAFE TO DRIVE. IT IS AT A DIFFERENT DEALERSHIP DUE TO THE SELLING DEALERS INCOMPETENCE IN THEIR SERVICE DEPARTMENT AND MANAGEMENT TO ADDRESS THE PROBLEM. THESE PROBLEMS HAVE BEEN GOING ON FOR OVER 5 MONTHS AND OVER A PERIOD OF 15,000 MILES AND I DO NOT BELIEVE IT CAN BE FIXED AND I DO NOT BELIEVE THE MANUFACTURER IS REALLY TRYING TO REPAIR THE CAR BECAUSE OF ALL THE STALLING THEY ARE CURRENTLY DOING AT THIS TIME. I NEED YOUR HELP.
NHTSA ODI #10862741
10 miles · Dec 24, 2015
Unknown Or Other
THE ROOF RACK THAT CAME WITH THE RAV4 STATES THAT EACH STRUT CAN HOLD 100LBS, BUT IN THE MANUAL IT STATES THAT IT IS 100 LBS TOTAL. I PURCHASED SOME LUMBER AND MY ROOF RACK FAILED ON THE RETURN TRIP HOME. I BELIEVE IT HAPPENED WHEN I WAS DRIVING ON THE HIGHWAY. ONE SIDE OF EACH STRUT BROKE AND DENTED THE ROOF OF MY CAR. IF THE O…
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THE ROOF RACK THAT CAME WITH THE RAV4 STATES THAT EACH STRUT CAN HOLD 100LBS, BUT IN THE MANUAL IT STATES THAT IT IS 100 LBS TOTAL. I PURCHASED SOME LUMBER AND MY ROOF RACK FAILED ON THE RETURN TRIP HOME. I BELIEVE IT HAPPENED WHEN I WAS DRIVING ON THE HIGHWAY. ONE SIDE OF EACH STRUT BROKE AND DENTED THE ROOF OF MY CAR. IF THE OTHER SIDE OF THE STRUTS FAILED THERE WOULD HAVE BEEN SOME DEVASTATION BEHIND ME AS LUMBER AND ROOF RACK PARTS WOULD HAVE FLOWN OFF BEHIND ME. I DO NOT KNOW THE EXACT WEIGHT OF THE LUMBER, BUT BASED ON THE QUANTITY I PURCHASED I CAN ASSUME IT WEIGHED AROUND 110-120 LBS. IF I KNEW THAT IT COULDN'T HANDLE 200LBS LIKE I WAS LED TO BELIEVE, I WOULD HAVE EASILY PUT ONE BOARD OR ALL OF THEM IN THE CAR INSTEAD OF THE ROOF RACK. I WOULD ALSO ASSUME THAT TOYOTA WOULD HAVE SOME SORT OF FACTOR OF SAFETY ON THE STRUTS. ALSO THE SIDE OF THE STRUTS THAT DIDN'T FAIL I ASSUME HAD AN INCREASED LOAD APPLIED TO THEM. THIS WOULD MAKE ME THINK THAT THERE COULD BE A PROBLEM IN THEIR MOLDING PROCESS AS WELL. THE PICTURE SHOWS THAT EACH ONE SAYS THAT IT CAN TAKE 100LBS EVENLY DISTRIBUTED. MY POINT IF MY TIRE SAYS 40PSI MAX THEN I DON'T FILL IT TO 10PSI BECAUSE THERE ARE 4 OF THEM. THE STRUTS ARE ALSO SEPARATE PIECES, WHAT IF I MIXED AND MATCHED OR ONLY HAD ONE ON THE CAR. ALSO THESE STRUTS ARE SOLD WITH THE RAV4 MODEL I GOT AND NOT PURCHASED AS AFTERMARKET OR AS AN ADD ON ITEM.
NHTSA ODI #10812046
5,700 miles · Dec 11, 2015
Electrical SystemFuel/propulsion SystemUnknown Or Other
PURCHASED THIS CAR DEALER CERTIFIED AFTER BEING LEASED FOR 9 MONTHS BY SOMEONE ELSE, FROM NEW ROCHELLE TOYOTA. HAD 5700 MILES ON IT AT THE TIME OF PURCHASE. SINCE PURCHASE IT DOES NOT ALWAYS START THE FIRST TIME, SOMETIMES TAKING 3-4 TIMES TO START, AND MAKING STRANGE NOISES, IT SOUNDS LIKE ITS GOING TO START AND THEN DIES. HAS …
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PURCHASED THIS CAR DEALER CERTIFIED AFTER BEING LEASED FOR 9 MONTHS BY SOMEONE ELSE, FROM NEW ROCHELLE TOYOTA. HAD 5700 MILES ON IT AT THE TIME OF PURCHASE. SINCE PURCHASE IT DOES NOT ALWAYS START THE FIRST TIME, SOMETIMES TAKING 3-4 TIMES TO START, AND MAKING STRANGE NOISES, IT SOUNDS LIKE ITS GOING TO START AND THEN DIES. HAS BEEN TO THE SHOP 3 TIMES AND GOING IN FOR THE 4TH TIME TODAY, ON 12/4 A NEW FUEL PUMP RELAY WAS INSTALLED, STARTS BETTER BUT STILL UNKNOWN REASON WHY IT AT TIMES IT STILL TAKES 3-4 TIMES TO START IT. IS A MYSTERY , NOTHING SHOWS UP ON THE TECH COMPUTERS AFTER IT HAPPENS OVER AND OVER AGAIN. HAVE OWNED TOYOTAS FOR OVER 17 YEARS NEVER EXPECTED AN ISSUE LIKE THIS. ALSO LIGHTS FLICKER AND THERE ARE STRANGE NOISES WHEN ATTEMPTING TO START AND UNSUCCESSFUL. NO RHYME OR REASON TO THIS ISSUE.TOOK POSSESSION OF THE CAR 10-13-15 I THINK IT IS A LEMON. I HAVE A VIDEO OF WHAT HAPPENS DONT THINK I CAN UPLOAD TO THIS WEBSITE.
NHTSA ODI #10809611
26,000 miles · Oct 20, 2015
Unknown Or Other
SUNROOF SPONTENOUSLY BUSTED WHILE DRIVING ON THE INTERSTATE.
NHTSA ODI #10783587
612 miles · Oct 5, 2015
Electrical SystemUnknown Or Other
AFTER 10 DAYS OF OWNING THE CAR AND LESS THAN 600 MILES THE CAR WOULDN'T RUN AND WE HAD TO HAVE IT TOWED TO THE DEALERSHIP. THEY SAID IT WAS NOT UNDER WARRANTY AND THAT THE DAMAGE WAS CAUSED BY A RODENT. LATER THAT SAME EVENING OUR SALESMAN CALLED AND INFORMED US THAT COMPONENTS IN THE CAR ARE "GREEN" AND MADE OF SOYBEAN AND TO …
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AFTER 10 DAYS OF OWNING THE CAR AND LESS THAN 600 MILES THE CAR WOULDN'T RUN AND WE HAD TO HAVE IT TOWED TO THE DEALERSHIP. THEY SAID IT WAS NOT UNDER WARRANTY AND THAT THE DAMAGE WAS CAUSED BY A RODENT. LATER THAT SAME EVENING OUR SALESMAN CALLED AND INFORMED US THAT COMPONENTS IN THE CAR ARE "GREEN" AND MADE OF SOYBEAN AND TO KEEP OUR CAR IN THE GARAGE (WHICH WE DON'T HAVE). I HAVE SINCE CAUGHT A MOUSE UNDER THE HOOD OF THE VEHICLE WITH A GLUE TRAP AND FOUND HAIR AND MOUSE DROPPINGS. THE BEST OFFER THEY HAVE GIVEN ME IS TO GIVE ME A DIFFERENT TOYOTA VEHICLE AT COST (AND TAKE THE LOSS ON MY CURRENT VEHICLE). I HAVE COMPLAINED TO BOTH THE DEALERSHIP AND TO TOYOTA. I HAVE HAD TWO OTHER VEHICLES PARKED IN WITHIN THE SAME PROXIMITY FOR OVER TWO YEARS. I HAVE NEVER HAD RODENT ISSUES WITH EITHER OF THEM AND I RUN INTO ISSUES WITHIN THE FIRST 10 DAYS WITH A NEW VEHICLE. I AM CONCERNED FOR THE SAFETY OF MY WIFE AND TWO YEAR OLD CHILD. IF THERE ARE MICE LIVING INSIDE THE CAR, THEY COULD BE LEAVING RAT DROPPINGS THAT COULD BE HARMFUL TO BOTH OF THEM. I AM ANGRY AND CONCERNED AND DON'T UNDERSTAND WHY, WHEN OTHER VEHICLES PARKED IN THE SAME LOCATION AREN'T EXPERIENCING THE SAME PROBLEM, THIS ISN'T A VALID REASON TO RETURN THE CAR. HERE ARE TWO ARTICLES THAT DETAIL THE PROBLEM MYSELF AND OTHER TOYOTA OWNERS HAVE HAD - HTTP://CTWATCHDOG.COM/FINANCE/RODENTS-DAMAGE-CARS-BY-CHEWING-ELECTRICAL-CONNECTIONS-TIPS-ON-HOW-TO-AVOID-COSTLY-REPAIRS, HTTP://WWW.SYNLUBE.COM/INCREDIBLEEDIBLECAR1.HTM
NHTSA ODI #10779880
1,897 miles · Sep 4, 2015
Fuel/propulsion SystemUnknown Or Other
AFTER GASSING UP IN A STATION (FULL TANK) AND THE GAS NOZZLE CLICKED TO A STOP, SOON AS EXTRACTING THE NOZZLE FROM THE RAV4, FUEL SPRAYS WITH A FORCE OF PRESSURE FROM THE GAS TANK TOWARDS THE PERSON HOLDING THE NOZZLE. AFTER THIS EVENT HAPPENED THE THIRD TIME, WE BROUGHT THE RAV4 BACK TO TOYOTA TO BE CHECKED. WAS RETURNED TO U…
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AFTER GASSING UP IN A STATION (FULL TANK) AND THE GAS NOZZLE CLICKED TO A STOP, SOON AS EXTRACTING THE NOZZLE FROM THE RAV4, FUEL SPRAYS WITH A FORCE OF PRESSURE FROM THE GAS TANK TOWARDS THE PERSON HOLDING THE NOZZLE. AFTER THIS EVENT HAPPENED THE THIRD TIME, WE BROUGHT THE RAV4 BACK TO TOYOTA TO BE CHECKED. WAS RETURNED TO US THE NEXT DAY WITH AN OK RESULT. BUT THE NEXT 2 TO 5 WEEKS THE SAME PROBLEM HAPPENED, SO WE REQUESTED THAT A REPLACEMENT RAV4 BE GIVEN US - BUT TOYOTA REFUSED STATING THAT WITH THE WARRANTY, THEY WILL NOW PERFORM A RIGID TEST - THE RESULTS OF WHICH CONFIRMED THE PROBLEM OF GAS SPRAYS. WE JUST GOT BACK THE RAV4, AND TOYOTA SAID THEY REPLACED THE GAS TANK WITH A NEW ONE AND SAYING THAT THE OLD ONE HAD "A FACTORY DEFECT WHEREIN THE TANK FLAPPER WAS NOT CLOSING PROPERLY. I AM PUTTING THIS ON RECORD ON THIS REPORT, FOR FURTHER INVESTIGATION OF NHTSA FOR THE SAFETY OF OTHER OWNERS.
NHTSA ODI #10761730
6,224 miles · Jul 5, 2015
StructureUnknown Or Other
YESTERDAY, WHILE I WAS PARKED AT A SECURE LOCATION THE BACK GLASS OF MY 2015 TOYOTA RAV4 BROKE UNEXPECTEDLY FOR NO APPARENT REASON. THERE APPEARED TO BE NO POINT OF IMPACT AND THE GLASS APPEARED TO HAVE EXPLODED OUTWARDS. THERE WAS NOTHING IN THE CAR THAT WENT THROUGH THE WINDOW AND THERE WAS NOTHING AROUND THE CAR THAT MAY HAVE…
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YESTERDAY, WHILE I WAS PARKED AT A SECURE LOCATION THE BACK GLASS OF MY 2015 TOYOTA RAV4 BROKE UNEXPECTEDLY FOR NO APPARENT REASON. THERE APPEARED TO BE NO POINT OF IMPACT AND THE GLASS APPEARED TO HAVE EXPLODED OUTWARDS. THERE WAS NOTHING IN THE CAR THAT WENT THROUGH THE WINDOW AND THERE WAS NOTHING AROUND THE CAR THAT MAY HAVE HIT THE WINDOW. OTHER THAN TWO SMALL AREAS WHERE THE GLASS FELL OUTWARD THE WINDOW WAS SHATTERED BUT TOGETHER. HOWEVER WHEN I GOT IN MY CAR AND MOVED IT ALL THE GLASS CRUMBLED AND FELL INTO THE TRUCK AREA.
NHTSA ODI #10732002
5 miles · Jun 2, 2015
StructureUnknown Or Other
LOUD BUFFETING WIND NOISE AND VIBRATION WHEN ANY REAR WINDOW IS PARTIALLY LOWERED OR OPEN. WILL DIMINISH OR GO AWAY IF EITHER FRONT WINDOW IS OPEN PARTIALLY OR ALL THE WAY. VIBRATING DRONING NOISE IS SO LOUD YOU CAN HEAR NOTHING ELSE. NOISE INCREASES WITH SPEED STARTING AT ABOUT 20 MPH AND UP. DESIGN FLAW OR IS A REPAIR AVAILABL…
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LOUD BUFFETING WIND NOISE AND VIBRATION WHEN ANY REAR WINDOW IS PARTIALLY LOWERED OR OPEN. WILL DIMINISH OR GO AWAY IF EITHER FRONT WINDOW IS OPEN PARTIALLY OR ALL THE WAY. VIBRATING DRONING NOISE IS SO LOUD YOU CAN HEAR NOTHING ELSE. NOISE INCREASES WITH SPEED STARTING AT ABOUT 20 MPH AND UP. DESIGN FLAW OR IS A REPAIR AVAILABLE? DEFINITELY A SAFETY ISSUE IN MY OPINION. NATURE OF THE VEHICLE? HOPE NOT.
NHTSA ODI #10722906
Official recalls
4Nov 1, 2023
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2013-2018 RAV4 vehicles. Certain replacement 12-volt batteries may not fit properly in the battery tray, allowing the battery to move and contact the hold-down bracket, possibly causing a short circuit.
Consequence & remedy
Consequence: A battery short circuit increases the risk of a fire.
Remedy: Dealers will replace the battery clamp sub-assembly, battery tray, and positive terminal cover, free of charge. Owner letters were mailed December 27, 2024, to 2013-2014 RAV4 owners. Additional owner notification letters will be mailed in phases, phase 2 will begin on May 14, 2025, and phase 3 in late July 2025. Owners may contact Toyota's customer service at 1-800-331-4331. Toyota's numbers for this recall are 23TB13 and 23TA13.
Mar 13, 2015
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2015 Camry, Camry Hybrid, Highlander, and Highlander Hybrid, and 2014-2015 Rav4 vehicles. A component of the electric power steering (EPS) electronic control unit (ECU) may have been damaged during the manufacturing process. Over time, this damage may result in failure of the electric power steering system.
Consequence & remedy
Consequence: An unexpected loss of power steering increases the risk of a crash.
Remedy: Toyota will notify owners, and dealers will inspect the serial number of the EPS ECU or steering column assembly. If the number is within the affected range, the EPS ECU will be replaced, free of charge. The recall began on May 7, 2015. Owners may contact Toyota customer service at 1-800-331-4331.
Jan 16, 2015
Southeast Toyota Distributors, LLC (SET) is recalling certain model year 2013-2015 Toyota Rav4 vehicles manufactured June 1, 2013, to December 29, 2014, and equipped with an accessory trailer light module. The software within the module may incorrectly detect an electrical short and preventively turn off the electrical current and the trailer lights.
Consequence & remedy
Consequence: If the system incorrectly detects an electrical short and turns off the trailer lights while the trailer is being towed at night, there is an increased risk of a crash.
Remedy: SET will notify owners, and dealers will replace the trailer light module with a new unit with corrected software, free of charge. The recall began on March 17, 2015. Owners may contact SET customer service at 1-866-405-4226. SET's number for this recall is SET-15A.
Additional source detail variants (2)
Trailer Hitches
Southeast Toyota Distributors, LLC (SET) is recalling certain model year 2013-2015 Toyota Rav4 vehicles manufactured June 1, 2013, to December 29, 2014, and equipped with an accessory trailer light module. The software within the module may incorrectly detect an electrical short and preventively turn off the electrical current and the trailer lights.
Consequence: If the system incorrectly detects an electrical short and turns off the trailer lights while the trailer is being towed at night, there is an increased risk of a crash.
Remedy: SET will notify owners, and dealers will replace the trailer light module with a new unit with corrected software, free of charge. The recall began on March 17, 2015. Owners may contact SET customer service at 1-866-405-4226. SET's number for this recall is SET-15A.
Exterior Lighting
Southeast Toyota Distributors, LLC (SET) is recalling certain model year 2013-2015 Toyota Rav4 vehicles manufactured June 1, 2013, to December 29, 2014, and equipped with an accessory trailer light module. The software within the module may incorrectly detect an electrical short and preventively turn off the electrical current and the trailer lights.
Consequence: If the system incorrectly detects an electrical short and turns off the trailer lights while the trailer is being towed at night, there is an increased risk of a crash.
Remedy: SET will notify owners, and dealers will replace the trailer light module with a new unit with corrected software, free of charge. The recall began on March 17, 2015. Owners may contact SET customer service at 1-866-405-4226. SET's number for this recall is SET-15A.
Dec 30, 2014
Southeast Toyota Distributors, LLC (SET) is recalling certain model year 2014-2015 Toyota 4Runner, Tacoma, FJ Cruiser, Land Cruiser, RAV4, Scion FRS, and XB vehicles. The affected vehicles may have accessories installed by SET, such as running boards or other items, that were incorrectly installed. The accessory attaching fasteners were not tightened with the proper torque, possibly causing the accessory to detach from the vehicle.
Consequence & remedy
Consequence: Accessories that detach from a vehicle may result in a vehicle crash and/or personal injury.
Remedy: SET will notify owners, and dealers will inspect and tighten the affected bolts, free of charge. The recall began February 23, 2015. Owners may contact SET customer service at 1-866-405-4226. SET's number for this recall is SET-14B.
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
1PE21005 · Battery Hold Down Bracket Thermal Events
Opened Feb 25, 2021 · Closed Aug 12, 2024
Status: closed (inferred from source dates) · Electrical SYSTEM:12V/24V/48V Battery
The Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE) to understand the contributing factors and frequency of vehicle fires originating from the battery region of the engine compartment in Model Year (MY) 2013-2018 Toyota RAV4 vehicles on 25 February 2021. At the time of opening, ODI attributed eleven allegations and additional EWR events to this PE. PE21005 focused on replacement batteries installed in the subject vehicles. No reported fire event identified in PE21005 involved the originally supplied 12V battery. The reported fires took place in vehicles known to contain aftermarket batteries or whose age exceeded the expected life of the original equipment battery. ODI identified battery dimensioning as it relates to the battery retention system (hold down bracket, radiator support bolt, J-hook, and battery tray) as the main factor set in the contact between the battery hold down bracket contacting the positive terminal of the 12V battery. The subject vehicles carried over the same battery tray and retention system from the prior generation (MY2006 – MY2012) of RAV4 vehicles. However, the subject vehicles were equipped with a dimensionally smaller battery (Group 35) than the prior generation (Group 24F). The smaller- length measurement in the Group 35 battery size in a battery tray originally designed to fit a Group 24F battery contributed to increased potential for battery movement which was exacerbated by the diversity in aftermarket battery configuration and irregularities intrinsic to battery replacement procedures. Battery movement coupled with the proximity of the B+ terminal on the battery and the grounded electrically conductive hold down bracket set the stage for a short to ground leading to an engine stall (if in operation) followed by a vehicle fire. This investigation was not able to classify the installation status, battery size, or cause of every allegation due to the fire event causing damage to the area, inaccessible vehicle, modification to the battery retention system after the event, and/or inconclusive photographic evidence. Toyota's investigation of the issue identified aftermarket battery catalogs that listed an improper battery replacement size (Group 26R) that would nevertheless fit into the subject vehicles whose battery retention system is incapable of reliably restraining a Group 26R battery. On 18 November 2021, Toyota initiated a consumer advisory campaign (21TG01) to the subject vehicle owners, notifying them of the correct size battery and offering a free inspection of the battery and retention hardware, a caution label to affix to the hold down bracket, and a discounted replacement 12V battery. This investigation with Toyota established three broad categories to characterize the battery retention system state of a given vehicle: "correct", "minor mis-installation", and "major mis-installation". - The "correct" terminology references the front bolt, bracket, and J-hook installed in a position not in contact with the positive battery terminal and the front bolt torqued to 17 Nm and the J-hook engaged with the tray hole and torqued to 4.9 Nm. - A "minor mis-installation" would describe the three retention components installed in the prescribed location, however not to the correct torque values. - The "major mis-installation" condition would constitute a retention component missing or disconnected from the system. Toyota's own testing used five exemplar batteries installed on a subject vehicle in each battery categorization resulted in: - Contact between the B+ terminal and hold down bracket in "major mis-installations" - Movement of the battery in "minor mis-installations" - No observable motion in "correct" installations. ODI conducted its own evaluation of the Toyota- specified replacement battery and 5 aftermarket Group 35 batteries. The six batteries tested conformed to the Group 35 Battery Council International (BCI) standard on overall dimensional tolerance and terminal location. That standard does not define the edge shape or material of battery casing. Physical interaction between the hold down bracket and the battery case and the friction between the casing material and the battery tray resulted in a large variability in movement forces required to incite movement when the battery was installed in the "correct" condition. Resulting in movement at an induced lateral load between 0.6 G and 1.91 G equivalent force across each battery. This force is higher than a typical vehicle could exert in a steady state turn and would only experience loads through brief shock or impulses. Multiple shock or impulse loads across time would contribute to a delay between the replacement battery installation and the fire event. Likelihood of a fire event increases as the installation method degraded from the "correct", to "minor mis-installation", and then to "major mis-installation". Protruding vent caps atop some of the batteries tested aided in restricting battery movement relative to the hold down. An absence of vent caps permitted additional movement. Following several discussions and vehicle inspections with ODI during this investigation, on 01 November 2023, Toyota filed a safety recall (NHTSA 23V-734) of 1,853,568 MY 2013 through MY 2018 Toyota RAV4 vehicles to reduce the risk of a vehicle fire with redesigned battery retention components. To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.