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2011 Dodge RAM 2500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2011 Dodge RAM 2500 do not stand out strongly from the model-year median of 275.

About this comparison →

When problems were reported

Mileage at the reported incident

149 reports with mileage · 148 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.

  • Steering. Review the 210 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Suspension. Review the 37 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

3 crash reports6 fire reports3 injury reports

What owners actually said

297 reports
55,000 miles · Aug 12, 2020
Steering

DEATH WOBBLE AT INTERSTATE 70MPH SPEEDS, NO CONTROL UNTIL SPEED DROPS TO 30. HAS HAPPENED 5 TIMES.-FIRST TIME FEB 2019 WITH ABOUT 55K MILES. LAST TIME WAS AUG 2020 WITH LESS THAN 60K MILES. HAVE SPENT CONSIDERABLE TIME ND MONEY TO NO AVAIL. CONDITION IS EXTREMELY DANGEROUS AS IT HAPPENS WITH NO WARNING AND IS ALARMINGLY…

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DEATH WOBBLE AT INTERSTATE 70MPH SPEEDS, NO CONTROL UNTIL SPEED DROPS TO 30. HAS HAPPENED 5 TIMES.-FIRST TIME FEB 2019 WITH ABOUT 55K MILES. LAST TIME WAS AUG 2020 WITH LESS THAN 60K MILES. HAVE SPENT CONSIDERABLE TIME ND MONEY TO NO AVAIL. CONDITION IS EXTREMELY DANGEROUS AS IT HAPPENS WITH NO WARNING AND IS ALARMINGLY VIOLENT. THIS NEEDS TO BE RECALLED AND FIXED OR SENT TO THE SALVAGE YARD

NHTSA ODI #11348924

177,000 miles · Aug 1, 2020
Electrical SystemEngineFuel/propulsion System

THERE ARE TWO ISSUES AT HAND HERE. ONE IS THE FUEL PUMP FUSE/RELAY. IT WENT OUT BUT CANT BE FIXED WITHOUT REPLACING THE ENTIRE FUSE BOX AS IT IS INTERNALLY WITHIN FUSE BOX. I DID A BYPASS AND REPLACED FUEL PUMP, BUT I STILL HAVE CODES RELATED TO FUEL SYSTEM HAVING A LEAK. WHEN THIS ISSUE HAPPENED, MY WIFE WAS LEFT STRANDED AS TH…

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THERE ARE TWO ISSUES AT HAND HERE. ONE IS THE FUEL PUMP FUSE/RELAY. IT WENT OUT BUT CANT BE FIXED WITHOUT REPLACING THE ENTIRE FUSE BOX AS IT IS INTERNALLY WITHIN FUSE BOX. I DID A BYPASS AND REPLACED FUEL PUMP, BUT I STILL HAVE CODES RELATED TO FUEL SYSTEM HAVING A LEAK. WHEN THIS ISSUE HAPPENED, MY WIFE WAS LEFT STRANDED AS THE TRUCK WOULDN'T TURN ON. ALSO, ON A DIFFERENT NOTE, I NOTICED MY TRAILER BRAKE LIGHT COMING ON SAYING IT IS DISABLE AND FLASHES ON AND OFF AS I AM DRIVING. NOT SURE IF THIS IS RELATED TO THE ELECTRICAL ASPECT OF IT. THE OTHER WAS ON ENGINE. I HAVE A 2011 RAM 2500 5.7 4X4. IT STARTED WITH HAVING A CYLINDER 1 MISFIRE. I REPLACED SPARK PLUGS AND COILS. STILL HAD ISSUE AND AFTER SOME RESEARCH, I FOUND OUT THAT THE VALVE STEM/SPRING IN ENGINE HEAD BREAK AND CAUSE THE LIFTERS AND CAMSHAFT TO RUB AND RELEASE METAL SHAVINGS THROUGH OUT ENGINE. WHILE THIS WAS MESSED UP, I WOULD NOTICE THE TRUCK WOULD SHAKE VERY HARD AS I APPROACHED A CERTAIN SPEED LIMIT. I TOOK TRUCK TO DODGE DEALERSHIP TO VERIFY RESEARCH AND IT WAS CONFIRMED. I WAS TOLD I NEEDED A NEW ENGINE. SO I REPLACED ENGINE. TOTAL BILL WAS OVER 7500 FOR PARTS AND LABOR.

NHTSA ODI #11342669

178,000 miles · Jun 15, 2020
Engine

TL* THE CONTACT OWNS A 2011 DODGE RAM 2500. THE CONTACT STATED THAT WHILE DRIVING AT 5 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS RESTARTED AND DRIVEN TO THE RESIDENCE. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO STERLING CHRYSLER JEEP DODGE RAM LOCATED AT 5504 I-49 FRONTAGE RD, OPELOUSAS, LA 70570, (337) 942-1…

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TL* THE CONTACT OWNS A 2011 DODGE RAM 2500. THE CONTACT STATED THAT WHILE DRIVING AT 5 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS RESTARTED AND DRIVEN TO THE RESIDENCE. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO STERLING CHRYSLER JEEP DODGE RAM LOCATED AT 5504 I-49 FRONTAGE RD, OPELOUSAS, LA 70570, (337) 942-1241, TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE ENGINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND A COMPLAINT WAS FILED. THE FAILURE MILEAGE WAS APPROXIMATELY 178,000.

NHTSA ODI #11329011

62,500 miles · Mar 4, 2020
Steering

THE TRUCK IS MAKING NOISES EVERY TIME YOU TURN THE WHEEL, IT IS VERY STIFF, AND THERE IS A LEAK.

NHTSA ODI #11316068

68,000 miles · Nov 15, 2019
Electrical SystemPower Train

TL* THE CONTACT OWNS A 2011 RAM 2500. WHILE DRIVING 65 MPH, THE VEHICLE TURNED OFF AND RESTARTED INDEPENDENTLY. THE CONTACT WAS CONCERNED FOR HIS SAFETY. ADDITIONALLY, WHILE THE VEHICLE WAS PARKED ON SEVERAL OCCASIONS, THE CONTACT WAS UNABLE TO SHIFT THE VEHICLE OUT OF PARK. WHEN THE VEHICLE WAS TURNED OFF AND RESTARTED, IT RESU…

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TL* THE CONTACT OWNS A 2011 RAM 2500. WHILE DRIVING 65 MPH, THE VEHICLE TURNED OFF AND RESTARTED INDEPENDENTLY. THE CONTACT WAS CONCERNED FOR HIS SAFETY. ADDITIONALLY, WHILE THE VEHICLE WAS PARKED ON SEVERAL OCCASIONS, THE CONTACT WAS UNABLE TO SHIFT THE VEHICLE OUT OF PARK. WHEN THE VEHICLE WAS TURNED OFF AND RESTARTED, IT RESUMED NORMAL OPERATION. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE CONTACT STATED THAT THE FAILURES RECURRED ONCE. THE DEALER AND MANUFACTURER WERE NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 68,000. *DT*JB

NHTSA ODI #11280379

71,000 miles · Sep 13, 2019
Engine And Engine CoolingUnknown Or Other

WHEN THE VEHICLE'S ENGINE IS RUNNING, IF THE FREQUENCY OPERATED BUTTON IGNITION KEY (FOBIK) IS MOVED IN ANY SLIGHT MOVEMENT, THE ENGINE WILL IMMEDIATELY SHUT OFF. IT APPEARS THE FIX IS TO REPLACE THE WIRELESS IGNITION NODE (WIN) MODULE, SIMILAR TO OTHER SAFETY RECALLS ISSUED FOR OTHER DODGE/CHRYSLER MODELS. THE VEHICLE WILL SH…

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WHEN THE VEHICLE'S ENGINE IS RUNNING, IF THE FREQUENCY OPERATED BUTTON IGNITION KEY (FOBIK) IS MOVED IN ANY SLIGHT MOVEMENT, THE ENGINE WILL IMMEDIATELY SHUT OFF. IT APPEARS THE FIX IS TO REPLACE THE WIRELESS IGNITION NODE (WIN) MODULE, SIMILAR TO OTHER SAFETY RECALLS ISSUED FOR OTHER DODGE/CHRYSLER MODELS. THE VEHICLE WILL SHUT OFF EVERY DAY NOW AND HAS EVEN SHUT OFF WHILE DRIVING ON THE INTERSTATE. WE HAD TO TRY TO SAFELY PULL TO THE SIDE OF THE INTERSTATE AND RESTART THE VEHICLE.

NHTSA ODI #11258092

115,000 miles · May 25, 2019
Electrical System

WHEN WE GOT HOME LAST NITE I SAW SMOKE COMING OUT FROM UNDER THE HOOD AND I COULD SMELL SOMETHING BURNING LIKE ELECTRICAL. I OPENED THE HOOD AND THE ALTERNATOR WAS POURING OUT SMOKE. I GRABBED MY HOSE AND POURED WATER ON IT UNTIL I COULD DISCONNECT THE BATTERIES. UPON RESEARCH I FOUND THE SAME PROBLEM ON 2013 MODEL YEARS. I FEEL…

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WHEN WE GOT HOME LAST NITE I SAW SMOKE COMING OUT FROM UNDER THE HOOD AND I COULD SMELL SOMETHING BURNING LIKE ELECTRICAL. I OPENED THE HOOD AND THE ALTERNATOR WAS POURING OUT SMOKE. I GRABBED MY HOSE AND POURED WATER ON IT UNTIL I COULD DISCONNECT THE BATTERIES. UPON RESEARCH I FOUND THE SAME PROBLEM ON 2013 MODEL YEARS. I FEEL THE 2013 RECALL MAY NEED TO BE EXTENDED TO EARLIER MODEL YEARS. I AM FORTUNATE THE TRUCK DID NOT CATCH FIRE.

NHTSA ODI #11209921

80,000 miles · Apr 10, 2019
Engine

TO WHOM IT MAY CONCERN, MY WIFE AND I OWN A 2011 RAM 2500 6.7 TURBO DIESEL. IT WAS PURCHASED NEW BY HER PARENTS. I BOUGHT THE TRUCK FROM MY IN-LAWS A YEAR AGO AND IT'S JUST OVER 80,000 MILES. UNFORTUNATELY, OVER THE LAST 6 MONTHS, WE HAVE RUN INTO A COUPLE OF MAJOR ENGINE PROBLEMS: -O2 SENSOR (INCLUDES OVERLAY HARNESS AND…

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TO WHOM IT MAY CONCERN, MY WIFE AND I OWN A 2011 RAM 2500 6.7 TURBO DIESEL. IT WAS PURCHASED NEW BY HER PARENTS. I BOUGHT THE TRUCK FROM MY IN-LAWS A YEAR AGO AND IT'S JUST OVER 80,000 MILES. UNFORTUNATELY, OVER THE LAST 6 MONTHS, WE HAVE RUN INTO A COUPLE OF MAJOR ENGINE PROBLEMS: -O2 SENSOR (INCLUDES OVERLAY HARNESS AND MODULE REPLACEMENT), APPROX $1,500 -TURBOCHARGER - VARIABLE FLAPS NOT OPERATING PROPERLY, APPROX $5,000 (ACCORDING TO RAIRDON OF MONROE, WA) EVERYTHING I HAVE READ AND EVERY MECHANIC I HAVE TALKED TO (INCLUDING THE CHRYSLER DEALER) HAS SAID THE ONLY TRUE FIX IS TO DELETE THE EGR/EMISSIONS AND RUN THE TRUCK WITHOUT IT. IT IS VERY STRANGE THAT THE MOST TRUSTED FIX IS AN ILLEGAL OPTION AND THERE IS NO ASSISTANCE FROM CHRYSLER FOR EITHER OF THESE KNOWN PROBLEMS. SEEING AS THE DELETE IS AN ILLEGAL OPTION, I ATTEMPTED TO GO THE LEGAL ROUTE AND GET THE O2 SENSOR FIX AT THE DEALER. NOT MINUTES HAD I PICKED UP MY TRUCK, DRIVING OUT THE OF DEALERSHIP, THE CHECK ENGINE LIGHT CAME BACK ON FOR THE TURBOCHARGER. THERE IS SERVICE BULLETIN FOR THE O2 SENSOR ISSUE, HOWEVER IT WAS NEVER SUBMITTED AS A RECALL. IF IT IS A KNOWN ISSUE (A MANUFACTURE ERROR), WHY WAS THERE NO RECALL ISSUED BY CHRYSLER? IT SEEMS THE OVERARCHING ISSUE COMES FROM THE EMISSIONS EQUIPMENT. ALONG WITH THE O2 SENOR FAILING, THE TURBOCHARGER IS NOW SPITTING OUT AN ENGINE CODE (P2262). DUE TO THE CARBON/SOOT BUILD UP FROM THE EGR, THE VANES OF THE TURBOCHARGER BECOME CLOGGED. THIS IS ALSO A KNOWN ISSUE AND NOT A RECALL. PLEASE LET ME KNOW WHAT SOLUTIONS ARE AVAILABLE. THANK YOU!

NHTSA ODI #11195487

136,000 miles · Jan 28, 2019
Steering

TL* THE CONTACT OWNS A 2011 RAM 2500. WHILE DRIVING 30 MPH, THE STEERING WHEEL SEIZED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE DEALER AND MANUFACTURER WERE NOT NOTIFIED. THE FAILURE MILEAGE WAS 136,000. THE VIN WAS NOT AVAILABLE.

NHTSA ODI #11172658

67,344 miles · Jan 14, 2019
Electrical SystemFuel/propulsion System

THE EMISSIONS CHECK ENGINE LIGHT CAME ON AND WAS DIAGNOSED AS A OVERLAY WIRING HARNESS THAT WAS FAULTY AND NEEDED TO BE UPGRADED. THIS VEHICLE ONLY HAS 67000 MILES ON IT AND THIS ITEM HELPS CONTROL THE DIESELS EMISIONES. IT SHOULD BE COVERED BY THE FACTORY FOR THE 100,000 MILES AS STATED. UPON CONTACTING FCA THEY REFUSED TO HELP…

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THE EMISSIONS CHECK ENGINE LIGHT CAME ON AND WAS DIAGNOSED AS A OVERLAY WIRING HARNESS THAT WAS FAULTY AND NEEDED TO BE UPGRADED. THIS VEHICLE ONLY HAS 67000 MILES ON IT AND THIS ITEM HELPS CONTROL THE DIESELS EMISIONES. IT SHOULD BE COVERED BY THE FACTORY FOR THE 100,000 MILES AS STATED. UPON CONTACTING FCA THEY REFUSED TO HELP IN ANY WAY TO COVER COST OF REPAIRS. THIS REPAIR IS HAPPENING ON MULTIPLE DIESEL RAMS . I ONLY ASK THAT FCA BE HELD RESPONSIBILITY FOR VEHICLES THAT PRODUCE AND SELL

NHTSA ODI #11169967

Official recalls

4

17V821000 · Power Train:automatic Transmission:lever And Linkage:column Shift

Dec 20, 2017

Chrysler (FCA US LLC) is recalling certain 2016-2017 Ram 3500 Cab Chassis with a Gross Vehicle Weight Rating (GVWR) of less than 10,000 lbs, 2011-2017 Ram 3500, 4500 and 5500 Cab Chassis vehicles, 2009-2017 Ram 1500 and 2010-2017 Ram 2500 and 3500 pickup trucks, all equipped with a column shifter. Pushing the brake pedal for prolonged periods when the vehicle is running and in PARK may cause the Brake Transmission Shift Interlock (BTSI) pin to stick in the open position. With the pin in the open position, the transmission can be shifted out of PARK into any gear without pushing the brake pedal or having the key in the ignition.

Consequence & remedy

Consequence: Being able to shift the transmission without pushing the brake pedal and/or without a key in the ignition can increase the risk of an unintended vehicle rollaway that may result in personal injury or a crash.

Remedy: Chrysler will notify owners, and dealers will update the vehicle software, inspect the BTSI, and, as necessary, replace it, free of charge. The recall began February 26, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is T79.

14V635000 · Engine And Engine Cooling:engine:diesel; Fuel System, Diesel

Oct 8, 2014

Chrysler Group LLC (Chrysler) is recalling certain model year 2010-2014 Ram 2500, 3500, 4500, and 5500 trucks manufactured March 27, 2009, to September 5, 2013. In the affected vehicles, the electrical connectors of the diesel fuel heater may overheat.

Consequence & remedy

Consequence: If the connectors overheat, the fuel heater may leak fuel, increasing the risk of a fire.

Remedy: Chrysler will notify owners, and dealers will replace the harness side connector with a silver plated beryllium copper terminal service kit, and inspect the fuel heater for leaks, replacing it as necessary, free of charge. Chrysler issued interim notification to owners on December 8, 2014. The recall began on April 27, 2015. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is P65.

Additional source detail variants (2)

Fuel System, Diesel

Chrysler Group LLC (Chrysler) is recalling certain model year 2010-2014 Ram 2500, 3500, 4500, and 5500 trucks manufactured March 27, 2009, to September 5, 2013. In the affected vehicles, the electrical connectors of the diesel fuel heater may overheat.

Consequence: If the connectors overheat, the fuel heater may leak fuel, increasing the risk of a fire.

Remedy: Chrysler will notify owners, and dealers will replace the harness side connector with a silver plated beryllium copper terminal service kit, and inspect the fuel heater for leaks, replacing it as necessary, free of charge. Chrysler issued interim notification to owners on December 8, 2014. The recall began on April 27, 2015. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is P65.

Engine And Engine Cooling:engine:diesel

Chrysler Group LLC (Chrysler) is recalling certain model year 2010-2014 Ram 2500, 3500, 4500, and 5500 trucks manufactured March 27, 2009, to September 5, 2013. In the affected vehicles, the electrical connectors of the diesel fuel heater may overheat.

Consequence: If the connectors overheat, the fuel heater may leak fuel, increasing the risk of a fire.

Remedy: Chrysler will notify owners, and dealers will replace the harness side connector with a silver plated beryllium copper terminal service kit, and inspect the fuel heater for leaks, replacing it as necessary, free of charge. Chrysler issued interim notification to owners on December 8, 2014. The recall began on April 27, 2015. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is P65.

13V529000 · Steering:linkages:tie Rod Assembly

Nov 6, 2013

Chrysler Group LLC (Chrysler) is recalling certain model year 2008-2012 RAM 2500 4X4 and 3500 4X4 trucks, 2008-2012 Dodge RAM 3500 4x2 Cab Chassis, and model year 2008 Dodge RAM 1500 Mega Cab 4x4. The left tie rod assembly may break.

Consequence & remedy

Consequence: A failure of the tie rod assembly may result in a loss of steering control, increasing the risk of a crash.

Remedy: Chrysler notified owners on January 16, 2014 that dealers would inspect vehicles and replace the steering linkage assembly, if necessary. On or about February 27, 2014, Chrysler ceased its recall remedy program due to parts quality concerns, and then re-initiated it on or about April 14, 2014. In July 2015, and under a consent order with NHTSA, the company agreed to offer owners three options for remedying their vehicles: perform the original remedy, offer to repurchase the vehicle at the fair market value plus 10%, or offer an additional incentive offer towards the purchase of a new Dodge, Jeep, Chrysler, or Fiat vehicle. Chrysler will notify owners of the new recall options in a letter expected to be mailed on August 31, 2015. Owners may contact Chrysler at 1-800-247-9753. Chrysler's recall campaign number is N49.

11V350000 · Steering:linkages:tie Rod Assembly

Jul 6, 2011

CHRYSLER IS RECALLING CERTAIN MODEL YEAR 2008-2011 DODGE RAM 2500/3500 4X4, MANUFACTURED FROM FEBRUARY 14, 2008, THROUGH MARCH 28, 2011; MODEL YEAR 2008-2011 DODGE RAM 3500 CAB CHASSIS 4X2, MANUFACTURED FROM FEBRUARY 14, 2008, THROUGH MARCH 28, 2011; AND MODEL YEAR 2008 DODGE RAM 1500 MEGA CAB 4X4, MANUFACTURED FROM FEBRUARY 14, 2008, THROUGH AUGUST 15, 2008, BECAUSE THE LEFT TIE ROD BALL STUD MAY FRACTURE. THIS CONDITION TENDS TO OCCUR DURING LOW SPEED PARKING LOT TYPE MANEUVERS WHEN THE CUSTOMER IS MAKING A TIGHT TURN. ADDITIONALLY, MODEL YEAR 2003-2008 DODGE RAM 2500/3500 VEHICLES MAY HAVE RECEIVED THE AFFECTED TIE ROD ASSEMBLY AS A REPLACEMENT PART DURING NORMAL SERVICE.

Consequence & remedy

Consequence: THIS CONDITION COULD RESULT IN THE POTENTIAL LOSS OF DIRECTIONAL STABILITY IN THE LEFT HAND FRONT WHEEL, INCREASING THE RISK OF A CRASH.

Remedy: DEALERS WILL INSPECT THE TIE ROD ENDS FOR RELATIVE ORIENTATION AND REPLACE THE LEFT OUTER TIE ROD AS REQUIRED AND PERFORM A FRONT END TOE ALIGNMENT AS NEEDED. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON OCTOBER 3, 2011. OWNERS MAY CONTACT CHRYSLER AT 1-800-853-1403.

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.