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2012 Toyota Tundra

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2012 Toyota Tundra do not stand out strongly from the model-year median of 144.5.

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When problems were reported

Mileage at the reported incident

119 reports with mileage · 36 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. Review the 57 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel/propulsion System. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

7 crash reports2 fire reports1 injury reports

What owners actually said

155 reports
Mileage unknown · Jun 2, 2021
Fuel/propulsion SystemPower TrainVehicle Speed Control

2012 Toyota Tundra has a known design flaw in that moisture is allowed to condense, accumulate and corrode in components of the secondary air intake system leading to decrease performance especially in regards to acceleration which is critical to operating a vehicle safely.

NHTSA ODI #11419400

131,400 miles · Mar 3, 2021
Power Train

CHECK ENGINE LIGHT AND TRAC OFF LIGHT CAME ON. CAR AUTOMATICALLY REDUCES SPEED CAUSING DIFFICULTY PULLING OUT INTO TRAFFIC. THE SECONDARY AIR PUMPS ARE DEFECTIVE. SOMETHING TOYOTA IS AWARE OF BUT DOES NOT INCLUDE MY MODEL. NO HELP FROM THERE WARRANTY DEPARTMENT. PROBLEM HAPPENED AS I WAS PULLING OUT INTO TRAFFIC AND DID NOT HAVE…

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CHECK ENGINE LIGHT AND TRAC OFF LIGHT CAME ON. CAR AUTOMATICALLY REDUCES SPEED CAUSING DIFFICULTY PULLING OUT INTO TRAFFIC. THE SECONDARY AIR PUMPS ARE DEFECTIVE. SOMETHING TOYOTA IS AWARE OF BUT DOES NOT INCLUDE MY MODEL. NO HELP FROM THERE WARRANTY DEPARTMENT. PROBLEM HAPPENED AS I WAS PULLING OUT INTO TRAFFIC AND DID NOT HAVE ENOUGH SPEED TO GET OUT OF WAY OF INCOMING TRAFFIC.

NHTSA ODI #11398953

Mileage unknown · Jan 5, 2021
Wheels

WHEELS:LUGS/NUTS/BOLTS. SUMMARY: I HAVE PROBLEM WITH LUG NUT RIGHT REAR SIDE OF TRUCK WON'T COME LOOSE NUT KEEP SPINNING HAS A FACTORY DEFECT POSSIBLE THIS YEAR OF VEHICLES SHOULD BE LISTED IN 2013&2014 RECALL I HOPE THIS AND THE TIME GONE…

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WHEELS:LUGS/NUTS/BOLTS. SUMMARY: I HAVE PROBLEM WITH LUG NUT RIGHT REAR SIDE OF TRUCK WON'T COME LOOSE NUT KEEP SPINNING HAS A FACTORY DEFECT POSSIBLE THIS YEAR OF VEHICLES SHOULD BE LISTED IN 2013&2014 RECALL I HOPE THIS AND THE TIME GONE BY DOES NOT EFFECT ME AND MY SAFETY THIS SHOULD BE DEALER RESPONSIBILITY AND FIX

NHTSA ODI #11386708

115,000 miles · Jan 4, 2021
EnginePower Train

TL* THE CONTACT OWNS A 2012 TOYOTA TUNDRA. THE CONTACT STATED THAT THE VEHICLE WAS PURCHASED WITH THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS REPAIRED AT JOHN HARVEY TOYOTA (2901 BENTON RD, BOSSIER CITY, LA 71111, (318) 741-1337). THE CONTACT STATED THAT AFTER THE VEHICLE REPAIRED, THE TRANSMISSION FAILED AND THE…

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TL* THE CONTACT OWNS A 2012 TOYOTA TUNDRA. THE CONTACT STATED THAT THE VEHICLE WAS PURCHASED WITH THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS REPAIRED AT JOHN HARVEY TOYOTA (2901 BENTON RD, BOSSIER CITY, LA 71111, (318) 741-1337). THE CONTACT STATED THAT AFTER THE VEHICLE REPAIRED, THE TRANSMISSION FAILED AND THE CONTACT RETURNED THE VEHICLE TO THE SAME DEALER WHERE THE TRANSMISSION WAS ALSO REPAIRED. THE CONTACT STATED THAT THE VEHICLE FAILED TO ACCELERATE ABOVE 25 MPH AND WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE MECHANIC DETERMINED THAT THE SECONDARY AIR INJECTION SYSTEM FAILED AND NEEDED TO BE REPAIRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 115,000.

NHTSA ODI #11386483

75,000 miles · Nov 4, 2020
Engine

MY TUNDRA WITH 75,000 MILES HAS A CAMSHAFT TOWER LEAK AND THIS OIL IS FALLING INTO THE EXHAUST MANIFOLD WITHOUT BEING NOTICED BECAUSE IT DOESN'T MAKE IT TO THE FLOOR, BUT IT GETS TO THE SENSORS AND STARTS RUINING THEM. TOYOTA MOTOR CO KNOWS ABOUT THIS ISSUE IN ALL THEIR 5.7L ENGINES AND THAT ITS A FACTORY ROBOT ERROR BY NOT APP…

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MY TUNDRA WITH 75,000 MILES HAS A CAMSHAFT TOWER LEAK AND THIS OIL IS FALLING INTO THE EXHAUST MANIFOLD WITHOUT BEING NOTICED BECAUSE IT DOESN'T MAKE IT TO THE FLOOR, BUT IT GETS TO THE SENSORS AND STARTS RUINING THEM. TOYOTA MOTOR CO KNOWS ABOUT THIS ISSUE IN ALL THEIR 5.7L ENGINES AND THAT ITS A FACTORY ROBOT ERROR BY NOT APPLYING ENOUGH SEALANT IN THE GASKET. AND THIS IS JUST BEING FIXED IF YOU ARE EITHER UNDER FACTORY WARRANTY OR EXTENDED WARRANTY. THE VEHICLES LOOSE POWER AND IF DRIVING ON A HIGHWAY CAN CAUSE A MAJOR ACCIDENT. THE LEAST THIS COMPANY CAN DO IS OFFER A VOLUNTARY RECALL BUT THEY ARE REFUSING TO DO SO BECAUSE THE FIX WILL COST THEM $3500-$4000 FROM ALL THEIR 5.7L ENGINES ASSEMBLED IN THE U.S. SO FOR MY SAFETY AND THE SAFETY OF MANY TOYOTA DRIVERS AND GENERAL HIGHWAY DRIVERS SAFETY, I HOPE THIS WOULD BE TAKEN INTO CONSIDERATION. THANK YOU

NHTSA ODI #11372939

105,000 miles · Oct 20, 2020
Electronic Stability Control (esc)

I WAS MERGING INTO TRAFFIC ON TO MASS 93 HIGHWAY WHEN MY CHECK ENGINE LIGHT, TRAC OFF LIGHT AND BLINKING 4 LOE CAME ON. THE ENGINE WENT INTO LIMP MODE GREATLY REDUCING MY POWER AND I LOST CONTROL AND. I HAD TO PULL OFF THE LANE. I WAS ABLE TO MAKE IT TO THE NEXT EXIT AND GET TO A MECHANICS SHOP. THEY HOOKED UP A ANALYSIS COMPUTE…

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I WAS MERGING INTO TRAFFIC ON TO MASS 93 HIGHWAY WHEN MY CHECK ENGINE LIGHT, TRAC OFF LIGHT AND BLINKING 4 LOE CAME ON. THE ENGINE WENT INTO LIMP MODE GREATLY REDUCING MY POWER AND I LOST CONTROL AND. I HAD TO PULL OFF THE LANE. I WAS ABLE TO MAKE IT TO THE NEXT EXIT AND GET TO A MECHANICS SHOP. THEY HOOKED UP A ANALYSIS COMPUTER AND CAME BACK WITH MAINTENANCE CODE P2432, SECONDARY AIR PUMPS AND SECONDARY AIR PUMP VALVES. I FOUND OUT THAT THIS HAS BEEN AN ONGOING ISSUE WITH TOYOTA TUNDRAS GOING BACK TO 2007 MODELS. THE WARRANTY HAS BEEN EXTENDED ON 2007 - 2010 MODELS BUT NOT NEWER MODELS WHICH ARE STILL EXPERIENCING THE SAME PROBLEM.I FEEL THIS PROBLEM CONSTITUTES A POTENTIALLY DANGEROUS SAFETY HAZARD DUE TO THE DRASTIC REDUCTION IN POWER WHICH COULD CAUSE AN ACCIDENT DEPENDING ON WHEN THE PARTS IN QUESTION FAIL.

NHTSA ODI #11365413

118,900 miles · Sep 21, 2020
Steering

I WAS DRIVING AND ALL THE SUDDEN MY POWER STEERING WENT OUT. I WAS IN TRAFFIC AND ALMOST WAS IN AN ACCIDENT BECAUSE OF NO POWER STEERING. I IMMEDIATELY PULLED OVER AND LOOKED ON THE PASSENGER SIDE AND POWER STEERING FLUID WAS LEAKING OUT OF MY TIE ROD BOOT. I IMMEDIATELY GOT TO MY TOYOTA DEALER AND THEY AUTOMATICALLY KNEW WHAT I…

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I WAS DRIVING AND ALL THE SUDDEN MY POWER STEERING WENT OUT. I WAS IN TRAFFIC AND ALMOST WAS IN AN ACCIDENT BECAUSE OF NO POWER STEERING. I IMMEDIATELY PULLED OVER AND LOOKED ON THE PASSENGER SIDE AND POWER STEERING FLUID WAS LEAKING OUT OF MY TIE ROD BOOT. I IMMEDIATELY GOT TO MY TOYOTA DEALER AND THEY AUTOMATICALLY KNEW WHAT IT WAS, THE RACK AND PINION BLEW OUT. SO CLEARLY IT'S A TOYOTA THING I FIGURED. I WAS ABLE TO GET IT FIXED BY MY INSURANCE COMPANY BUT I STARTED DOING RESEARCH ON FORUMS AND MANY FACEBOOK GROUPS DEVOTED TO TOYOTA TUNDRAS AND DAILY I SEE MORE AND MORE PEOPLE ARE HAVING ISSUES WITH THEIR RACK AND PINION GOING OUT AND DAYS AFTER MY FRIEND ALSO HAD HIS GO OUT ON HIS TUNDRA. THIS SEEMS TO BE A MAJOR PROBLEM TOYOTA HAS AND IT EITHER NEEDS TO BE RECALLED OR FIXED SOMEHOW SO PEOPLE CAN BE SAFE AND NOT ALMOST GET IN AN ACCIDENT LIKE I DID. WHEN TOYOTA EVEN ACKNOWLEDGES IT AND REFUSES TO NOT FIX IT, THAT THROWS THE RED FLAG RIGHT THERE AND THEY CLEARLY UNDERSTAND IT'S A PROBLEM. THE FIX AMOUNTED TO $1937 DOLLARS ALSO.

NHTSA ODI #11360129

240,210 miles · Aug 29, 2020
Steering

THE STEERING WHEEL DID NOT STAY CENTERED AND THE POSITION WOULD CHANGE. I NOTICED THAT WHEN I WAS STOPPED AND THE STEERING WHEEL WAS LOCKED THAT THE STEERING WHEEL HAD SOME MOVEMENT FROM SIDE TO SIDE. I CHECKED THE STEERING WHEEL LOCK DOWN NUT AND IT WAS TIGHT. THE STEERING WHEEL HAS A SPLINE BUSHING THAT MATCHES UP WITH A MATC…

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THE STEERING WHEEL DID NOT STAY CENTERED AND THE POSITION WOULD CHANGE. I NOTICED THAT WHEN I WAS STOPPED AND THE STEERING WHEEL WAS LOCKED THAT THE STEERING WHEEL HAD SOME MOVEMENT FROM SIDE TO SIDE. I CHECKED THE STEERING WHEEL LOCK DOWN NUT AND IT WAS TIGHT. THE STEERING WHEEL HAS A SPLINE BUSHING THAT MATCHES UP WITH A MATCHING SPLINE ON THE SHAFT SO I COULD NOT SEE HOW THIS COULD MOVE. I REMOVED THE LOCKING NUT SO I COULD SEE THE WHERE THE STEERING WHEEL AND SHAFT CONNECT TOGETHER. WITH THE NUT OFF I NOTICED THAT THE SPLINE BUSHING DID NOT MOVE BUT THE STEERING WHEEL DID MOVE ON THE BUSHING. THERE WAS A POTENTIAL DANGER OF THE STEERING WHEEL COMING LOOSE SO THAT I WOULD LOSE CONTROL OR WORSE YET THE STEERING WHEEL COULD COME COMPLETELY OFF THE COLUMN. THIS PROBLEM CAN EASILY BE CHECKED AS I DID WITH THE STEERING WHEEL IN THE LOCKED POSITION. IF YOU HAVE ANY MOVEMENT OF THE STEERING WHEEL IN THE LOCKED POSITION GET IT CHECKED IMMEDIATELY.

NHTSA ODI #11352027

87,000 miles · Aug 21, 2020
Fuel/propulsion SystemPower Train

VERY SERIOUS MALFUNCTION WITH AIR INJECTION PUMP. THIS HAPPENED TO OCCUR AFTER FILLING UP THE GAS TANK. MULTIPLE DASHBOARD LIGHTS CAME ON AND THE TRUCK WENT INTO LIMP MODE. THIS COULD HAVE CAUSED A SERIOUS ACCIDENT WHILE ON THE HIGHWAY. $2000 PLUS IN REPAIRS FOR A VERY DANGEROUS AND APPARENTLY WELL KNOWN PROBLEM WITH RECALLS ISS…

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VERY SERIOUS MALFUNCTION WITH AIR INJECTION PUMP. THIS HAPPENED TO OCCUR AFTER FILLING UP THE GAS TANK. MULTIPLE DASHBOARD LIGHTS CAME ON AND THE TRUCK WENT INTO LIMP MODE. THIS COULD HAVE CAUSED A SERIOUS ACCIDENT WHILE ON THE HIGHWAY. $2000 PLUS IN REPAIRS FOR A VERY DANGEROUS AND APPARENTLY WELL KNOWN PROBLEM WITH RECALLS ISSUED IN PREVIOUS MODEL YEARS OF TUNDRA AND OTHER MODELS OF TOYOTA TRUCKS.

NHTSA ODI #11350696

130,000 miles · Aug 21, 2020
Engine

'12 TOYOTA TUNDRA APPEARS TO GO INTO LIMP MODE, BROUGHT IT TO THE DEALER SHIP, A RECALL WAS LISTED FOR SOMETHING, DIDN'T FIX THE ISSUE. HAD TO HAVE ABOUT $1,500OF WORK DONE. FIXED THE ISSUE....FOR 1.5 MONTHS. BACK AT THE DEALERSHIP AGAIN, THROWING ALL THE SAME CODES FOR ALL THE SAME PARTS. CLEARLY THE PARTS BEING USED AREN'T A F…

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'12 TOYOTA TUNDRA APPEARS TO GO INTO LIMP MODE, BROUGHT IT TO THE DEALER SHIP, A RECALL WAS LISTED FOR SOMETHING, DIDN'T FIX THE ISSUE. HAD TO HAVE ABOUT $1,500OF WORK DONE. FIXED THE ISSUE....FOR 1.5 MONTHS. BACK AT THE DEALERSHIP AGAIN, THROWING ALL THE SAME CODES FOR ALL THE SAME PARTS. CLEARLY THE PARTS BEING USED AREN'T A FIX TO THE PROBLEM, AND SEEMS LIKE MORE THAN JUST IS ARE HAVING THE SAME ISSUE. AT THIS POINT IT'S PLAYING WITH PEOPLES LIVES. TOYOTA DEALT WITH THIS WITH EARLIER MODELS BUT ANYTHING 2012 AND UP , NOTHING IS BEING DONE. SOMEONE IS GOING TO GET KILLED IF THESE TRUCKS GO INTO LIMP MODE ON A HIGHWAY AND THEY GET HIT AT 70-80 MILES AN HOUR FROM SOMETHING OUT OF THE DRIVERS CONTROL, THAT TOYOTA KNOWS ABOUT. WHEN WILL A RECALL CONDO THIS, SOMETHING NEEDS TO BE DONE.

NHTSA ODI #11350686

Official recalls

3

21V920000 · Steering:hydraulic Power Assist System; Steering:rack And Pinion

Nov 23, 2021

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2008-2022 Sequoia and 2007-2021 Tundra vehicles. The power steering gear assembly may have been manufactured incorrectly, which can result in an oil leak.

Consequence & remedy

Consequence: An oil leak may cause a sudden loss of power steering assist, increasing the risk of a crash.

Remedy: Dealers will inspect and replace the power steering gear assembly as necessary, free of charge. Owner notification letters were mailed on January 21, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's numbers for this recall are 21TB10 and 21TA10.

Additional source detail variants (2)

Steering:hydraulic Power Assist System

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2008-2022 Sequoia and 2007-2021 Tundra vehicles. The power steering gear assembly may have been manufactured incorrectly, which can result in an oil leak.

Consequence: An oil leak may cause a sudden loss of power steering assist, increasing the risk of a crash.

Remedy: Dealers will inspect and replace the power steering gear assembly as necessary, free of charge. Owner notification letters were mailed on January 21, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's numbers for this recall are 21TB10 and 21TA10.

Steering:rack And Pinion

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2008-2022 Sequoia and 2007-2021 Tundra vehicles. The power steering gear assembly may have been manufactured incorrectly, which can result in an oil leak.

Consequence: An oil leak may cause a sudden loss of power steering assist, increasing the risk of a crash.

Remedy: Dealers will inspect and replace the power steering gear assembly as necessary, free of charge. Owner notification letters were mailed on January 21, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's numbers for this recall are 21TB10 and 21TA10.

13V123000 · Equipment:other:labels

Apr 9, 2013

Southeast Toyota is recalling certain model year 2008 and 2010-2013 Toyota Tundra, 2010-2012 Rav4, 2012 Toyota Sequoia, 2010-2011 Toyota Corolla, 2010-2011 Toyota Camry and Camry Hybrid, 2010-2013 Toyota Highlander and Highlander Hybrid, 2010-2013 Toyota FJ Cruiser, 2011 Toyota Land Cruiser, 2010-2013 Toyota Venza, 2010-2011 Toyota 4Runner, 2010-2013 Toyota Tacoma, 2011-2012 Toyota Sienna, 2012 Toyota Prius, 2013 Scion FR-S, 2011 Scion XD, 2011 Scion XB, and 2012 Scion TC vehicles. These vehicles were sold with labels that were outside the allowable one percent of accuracy of actual weight added. Thus, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) Number 110, "Tire Selection and Rims."

Consequence & remedy

Consequence: An inaccurate label could lead to owners overloading their vehicles and tires. An overloaded vehicle can result in a tire failure which may result in a vehicle crash, personal injury, or property damage.

Remedy: Southeast Toyota will notify owners and provide a corrected label with instructions concerning its installation. A small group of the affected vehicles will need additonal remedies which are still being developed. The recall began on May 28, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.

13V014000 · Air Bags:frontal:sensor/control MODULE-INACTIVE ; Seats

Jan 16, 2013

Southeast Toyota Distributors, LLC (SET) is recalling certain models interspersed through model years 2009 through 2013 as follows: model year 2009-2012 Tacoma, 4Runner, Camry, Camry Hybrid, Prius, and RAV4; model year 2009-2010 Avalon, FJ Cruiser, and Highlander Hybrid; model year 2010-2013 model year Corolla, Sienna and Tundra; model year 2009-2013 Highlander and Venza; model year 2012 Prius V; and model year 2010-2012 Sequoia. During modification by SET to include accessories such as leather seat covers, seat heaters or headrest DVD systems, these vehicles may not have had the passenger seat occupant sensing system calibration tested. Without passing the calibration test, the occupant sensing system may not operate as designed.

Consequence & remedy

Consequence: If the front passenger seat occupant sensing system is out of calibration, the front passenger airbags may not deploy or they may deploy inappropriately for the passenger's size and position. This could increase the risk of personal injury during the event of a vehicle crash necessitating airbag deployment.

Remedy: Southeast Toyota will notify owners, and dealers will test the sensitivity of the occupant detection sensors, and recalibrate them as necessary. The recall began on March 21, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.

Additional source detail variants (2)

Seats

Southeast Toyota Distributors, LLC (SET) is recalling certain models interspersed through model years 2009 through 2013 as follows: model year 2009-2012 Tacoma, 4Runner, Camry, Camry Hybrid, Prius, and RAV4; model year 2009-2010 Avalon, FJ Cruiser, and Highlander Hybrid; model year 2010-2013 model year Corolla, Sienna and Tundra; model year 2009-2013 Highlander and Venza; model year 2012 Prius V; and model year 2010-2012 Sequoia. During modification by SET to include accessories such as leather seat covers, seat heaters or headrest DVD systems, these vehicles may not have had the passenger seat occupant sensing system calibration tested. Without passing the calibration test, the occupant sensing system may not operate as designed.

Consequence: If the front passenger seat occupant sensing system is out of calibration, the front passenger airbags may not deploy or they may deploy inappropriately for the passenger's size and position. This could increase the risk of personal injury during the event of a vehicle crash necessitating airbag deployment.

Remedy: Southeast Toyota will notify owners, and dealers will test the sensitivity of the occupant detection sensors, and recalibrate them as necessary. The recall began on March 21, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.

Air Bags:frontal:sensor/control MODULE-INACTIVE

Southeast Toyota Distributors, LLC (SET) is recalling certain models interspersed through model years 2009 through 2013 as follows: model year 2009-2012 Tacoma, 4Runner, Camry, Camry Hybrid, Prius, and RAV4; model year 2009-2010 Avalon, FJ Cruiser, and Highlander Hybrid; model year 2010-2013 model year Corolla, Sienna and Tundra; model year 2009-2013 Highlander and Venza; model year 2012 Prius V; and model year 2010-2012 Sequoia. During modification by SET to include accessories such as leather seat covers, seat heaters or headrest DVD systems, these vehicles may not have had the passenger seat occupant sensing system calibration tested. Without passing the calibration test, the occupant sensing system may not operate as designed.

Consequence: If the front passenger seat occupant sensing system is out of calibration, the front passenger airbags may not deploy or they may deploy inappropriately for the passenger's size and position. This could increase the risk of personal injury during the event of a vehicle crash necessitating airbag deployment.

Remedy: Southeast Toyota will notify owners, and dealers will test the sensitivity of the occupant detection sensors, and recalibrate them as necessary. The recall began on March 21, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.

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

1

EA19001 · Electrical Overstress

Opened Apr 19, 2019 · Closed Sep 19, 2024

Status: closed (inferred from source dates) · Air Bags: Air Bag/restraint Control Module

The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect.  During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped with an airbag control unit (ACU) for the supplemental restraint system (SRS) Electronic Control Unit (ECU) manufactured by ZF-TRW.  The ECU receives signals from crash sensors mounted in the vehicle and deploys the vehicle air bags and seat belt pretensioners in accordance with manufacturer design specifications.  The ECU in the subject vehicles contains a model DS84 application-specific integrated circuit (ASIC) which controls the communication of the crash sensor signal, firing commands (i.e., when to deploy the airbag(s) and/or pretensioners), and fault information (e.g., diagnostic trouble codes). In September 2016, FCA announced recall 16V-668 for certain model year (MY) 2010 to 2014 Chrysler, Dodge and Jeep products manufactured with the subject ZF-TRW ACU.  In this recall, FCA discussed an EOS condition that resulted in a failure of the subject DS84 ASIC, which caused air bag non-deployment.  FCA noted that the defect condition had only been observed in vehicles equipped with sensor harnessing routed across the front of the vehicle.  Other FCA vehicles that also used the subject ACU, but were not equipped with cross-car harnessing, had not experienced EOS failures, despite similar time in service. During the course of this investigation, ODI sent two separate Information Request (IR) letters to six vehicle manufactures (including FCA, Hyundai, Honda, Kia, Mitsubishi, and Toyota) and one IR letter to ZF-TRW.  These IR letters resulted in ODI receiving comprehensive data from these manufacturers and suppliers. Studies of this data found that the DS84 ASIC does not have sufficient protection against negative electrical transients or electrical overstress (“EOS”) that can be generated in certain severe crashes.  An electrical transient occurs when the electrical power supplied to a circuit changes momentarily over a short duration of time.   In these severe crash cases, the crash sensors and other powered wiring can be damaged and short circuited so as to create a negative electrical transient of sufficient intensity and duration (that are outside the vehicle manufacturer's specification) to damage the ASIC before the restraint device deployment signal is received by the SRS ECU.  This damaged signal can lead to incomplete or nondeployment of the air bags and/or pretensioners.  Airbag non-deployment and/or lack of pretensioner operation can increase the risk or severity of injury in a crash.A total of 8 fatalities and 14 injuries were associated with known EOS events. The common element in all investigated manufacturers vehicles is the SRS ECU containing a DS84 ASIC manufactured by ZF-TRW.  The risk associated with the ASIC is equally shared among all OEMS involved in the investigation.  The actual real-world risk can be mitigated by other factors which were assessed by ODI during this investigation. The first mitigating factor involves protections built into the ACU design which protect the DS84 ASIC from damage.  There are multiple strategies and levels of protection employed by different OEMs that provide effective EOS mitigation.  The two most common strategies at the ACU level are circuit protection diodes on the remote senor signal lines, and current limiting resistors that protect critical components. The second mitigating factor is found at the vehicle level and involves the location and routing of the wires leading from the crash sensors to the SRS ECU.  If the wires are well protected in a crash and are not routed with other power wires carrying large currents, the risk for an EOS event is significantly reduced or eliminated. These design specific factors combine to produce a spectrum of risk for the vehicles equipped with ACUs using the DS84 ASIC.  Given the many of years of field exposure, it is possible to divide the subject population into two groups; vehicles which have experienced EOS events, and vehicles which have not experienced EOS field events. Four of the six OEMs involved in this investigation have experienced EOS field events on at least one of their models equipped with a DS84 ASIC.  All vehicle models (including the Toyota models identified in the Failure Report Summary of the opening resume for this investigation) with field events have been recalled.  In an abundance of caution, ODI kept this investigation open five years to monitor field performance and did not identify any field events on vehicles not included in existing safety recalls. Given the spectrum of risk identified in this investigation and that all vehicles with a demonstrated unreasonable risk have been recalled, ODI is closing this investigation. ODI is closing this investigation with the following manufacturer safety recalls: 16V-668, 18E-043, 18V-137, 18V-363, and 20V-024.  With the recall actions taken by the subject vehicle and equipment manufacturers, this investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exists on other model or model year vehicles outside of the recall scopes. The agency reserves the right to take further action if warranted by the circumstances.