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2011 Chevrolet Silverado 1500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2011 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.

About this comparison →

When problems were reported

Mileage at the reported incident

263 reports with mileage · 300 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.

  • Air Bags. Review the 306 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 72 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 40 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

22 crash reports4 fire reports6 injury reports

Power Train complaints

17 reports
Clear category filter
813 miles · Jul 5, 2012
Power Train

WHEN STOPPED AT A STOP LIGHT OR STOP SIGN ON A ROAD THAT HAS AN INCLINE, WHEN REMOVING MY FOOT FROM THE BRAKE TO THE GAS PEDAL, THE TRUCK ROLLS BACKWARDS AND WILL NOT STOP AT ALL UNLESS THE BRAKE IS RE-APPLIED OR THE GAS PEDAL CAN BE PUSHED BEFORE THE VEHICLE ROLLS TOO FAR BACK. TALKED TO DEALER AND HAD VEHICLE IN TO BE CHECKED…

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WHEN STOPPED AT A STOP LIGHT OR STOP SIGN ON A ROAD THAT HAS AN INCLINE, WHEN REMOVING MY FOOT FROM THE BRAKE TO THE GAS PEDAL, THE TRUCK ROLLS BACKWARDS AND WILL NOT STOP AT ALL UNLESS THE BRAKE IS RE-APPLIED OR THE GAS PEDAL CAN BE PUSHED BEFORE THE VEHICLE ROLLS TOO FAR BACK. TALKED TO DEALER AND HAD VEHICLE IN TO BE CHECKED AND THEY STATED THAT THE TRANSMISSION WAS DESIGNED THAT WAY TO ELIMINATE STRESS ON THE TRANSMISSION AND IT WAS MEANT TO FREE ROLL FOR A SHORT DISTANCE. THIS IS AN UNSAFE CONDITION AS VEHICLE COULD ROLL BACKWARDS INTO ANOTHER VEHICLE, PERSON, OR OBJECT. ON A VERY STEEP INCLINE, THE VEHICLE KEPT ON ROLLING BACKWARD FOR SEVERAL FEET AND UNLESS I PUT MY FOOT ON THE BRAKE OR GAS IT WILL CONTINUING TO ROLL BACKWARDS. *TR

NHTSA ODI #10464336

400 miles · Jun 5, 2012
Power Train

I PURCHASED VEHICLE USE, WITH 384 MILES. VEHICLE TRANSMISSION BECAME VERY LOUD, WHINING, GROWLING, MAKING CLUNKING NOISE WHEN SHIFTING; DOWNSHIFTING AT TIMES PRODUCED RUNAWAY SHIFTING, CLUNKING AND SLIPPING. TOOK IT TO ONE CHEV. DEALER AND SERVICE WRITER SAID HE HAD A CHEV P.U. JUST LIKE MINE AND IT DIDN'T MAKE THOSE NOISES. …

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I PURCHASED VEHICLE USE, WITH 384 MILES. VEHICLE TRANSMISSION BECAME VERY LOUD, WHINING, GROWLING, MAKING CLUNKING NOISE WHEN SHIFTING; DOWNSHIFTING AT TIMES PRODUCED RUNAWAY SHIFTING, CLUNKING AND SLIPPING. TOOK IT TO ONE CHEV. DEALER AND SERVICE WRITER SAID HE HAD A CHEV P.U. JUST LIKE MINE AND IT DIDN'T MAKE THOSE NOISES. WENT BACK AGAIN AND DEALER FOUND A SERVICE BULLETIN THAT APPLIED TO MY TRANSMISSION. THEY ORDERED PARTS, INSTALLED THEM, BUT NO CHANGE. WENT BACK AGAIN AND THE SERVICE SHOP AND THEY SAID THERE WAS NOTHING WRONG WITH THE TRANSMISSION AND THERE WAS NOTHING MORE THEY COULD DO FOR MY P.U. I WENT TO ANOTHER DEALER AND THEY SAID IT NEEDED FRONT AND REAR PLANETARY GEARS. PARTS WERE ORDERED AND INSTALLED, AGAIN NO CHANGE. WENT BACK TO THE DEALER AND THEY DROVE MY P.U. THE SERVICE MANAGER SAID THERE WAS NOTHING WRONG WITH MY P.U. ! I SPOKE WITH A DISTRICT SPECIALIST AT G.M. AND SHE SAID SHE WOULD CONTACT THE DEALERSHIP! IT IS NOW JUNE 5, 2012 AND I AGAIN CALLED GM CUSTOMER ASSISTANCE AND THEY SAID THE WOMAN WHO HAD MY CASE NO LONGER WORKS IN THAT DEPARTMENT AND THEY WOULD ASSIGN ANOTHER SPECIALIST. SHE/HE WOULD CALL ME TODAY, MAYBE TOMORROW. I TOLD THEM ENOUGH IS ENOUGH AND I WANTED ANOTHER VEHICLE! *TR

NHTSA ODI #10460704

33,000 miles · May 9, 2012
Power TrainCrash

JUST SECONDS AFTER HAVING COME TO A COMPLETE STOP, THE TRANSMISSION SHIFTS WHILE RPMS INCREASE CAUSING THE VEHICLE TO OVERCOME THE BRAKE PRESSURE AND TRUCK TO MOVE FORWARD ABRUPTLY. THIS CAUSED ME TO ROLL OUT INTO THE LANE OF ONCOMING TRAFFIC AND STRIKE A VEHICLE AS IT WAS PASSING. *TR

NHTSA ODI #10457915

1,343 miles · Apr 18, 2012
Power Train

THIS VEHICLE HAS SEVERAL DEFECTS THAT GM CLAIMS AS NORMAL. 1. TRUCK RANDOMLY LURCHES FORWARD WHEN STARTED IN PARK. GM SAYS THIS IS NORMAL MAKE SURE YOU APPLY PARKING BRAKE WHEN PARKING. 2. DRIVE TRAIN CLUNKS WHEN DECELERATING INTO 10-20MPH RANGE AND ACCELERATING AGAIN. GM SAYS THIS IS NORMAL DUE TO TOLERANCES AND ACCELERAT…

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THIS VEHICLE HAS SEVERAL DEFECTS THAT GM CLAIMS AS NORMAL. 1. TRUCK RANDOMLY LURCHES FORWARD WHEN STARTED IN PARK. GM SAYS THIS IS NORMAL MAKE SURE YOU APPLY PARKING BRAKE WHEN PARKING. 2. DRIVE TRAIN CLUNKS WHEN DECELERATING INTO 10-20MPH RANGE AND ACCELERATING AGAIN. GM SAYS THIS IS NORMAL DUE TO TOLERANCES AND ACCELERATED IN FOUR WHEEL DRIVE VEHICLES. 3. VEHICLE DRAIN TRAIN RANDOMLY MAKES A BANG OR CLUNK NOISE WHEN ACCELERATING FROM A STOP. GM CLAIMS THIS IS ALSO NORMAL. I HAVE PURCHASED THIS TRUCK NEW IN NOVEMBER 2011 AND IT HAS BEEN IN THE SHOP FIVE TIMES. EACH TIME DEALER CHECKS REPAIR FOR DEFECT AND GM SENDS BACK BULLETIN SAYING NO REPAIR CONDITION NORMAL. DEALER SAYS A HANDFUL OF TRUCKS HAVE COME BACK WITH THIS SIMILAR PROBLEM. I CAN NOT BELIEVE GM ACCEPTS THIS DEFECT AS NORMAL. *JS

NHTSA ODI #10455629

2,260 miles · Nov 1, 2011
Engine And Engine CoolingPower TrainVehicle Speed Control

THIS IS A DEALER DEMO VEHICLE, FIRST 2235 MILES WERE DEMO. DURING MY FIRST MORNING (12HOURS AFTER PICKING UP AT DEALER) OF OWNERSHIP I WAS DESCENDING DOWN A HILL WITH THE CRUISE ON, AND THE VEHICLE PROCEEDED TO OVER SPEED APPROXIMATELY 5-7MPH. I TRAVEL THIS HILL BOTH WAYS TO/FROM WORK DAILY AND THIS HAPPENS EVERYTIME. I THOUGH T…

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THIS IS A DEALER DEMO VEHICLE, FIRST 2235 MILES WERE DEMO. DURING MY FIRST MORNING (12HOURS AFTER PICKING UP AT DEALER) OF OWNERSHIP I WAS DESCENDING DOWN A HILL WITH THE CRUISE ON, AND THE VEHICLE PROCEEDED TO OVER SPEED APPROXIMATELY 5-7MPH. I TRAVEL THIS HILL BOTH WAYS TO/FROM WORK DAILY AND THIS HAPPENS EVERYTIME. I THOUGH THIS MIGHT BE AN ABNORMAL ADJUSTMENT WITHIN THE COMPUTER/ETC SO WHILE TAKING IN TO THE DEALER FOR A TPMS (TIRE PRESSURE MONITOR SYSTEM) ISSUE I MENTIONED THE OVERSPEED ISSUE TO THE SERVICE WRITE UP AND THEY SAID THAT IT WAS NORMAL. I DON'T AGREE, BUT MAYBE IT IS. IT DOES ADJUST BACK TO NORMAL CRUISE SET SPEED BUT IS UNIQUE. I HAD A 2002 DODGE RAM 1500 PREVIOUSLY AND IT DID NOT DO THIS, AND I HAVE DROVE OTR (OVER THE ROAD) SEMI-TRUCKS AND KNOW THE DIFFERENCE WITH OVERSPEED BEING NORMAL AND ABNORMAL. I WOULD LIKE THIS TO BE LOOKED INTO, AS IT COULD BE A HAZARD THAT COULD LEAD TO UNSAFE SITUATION. *TR

NHTSA ODI #10433769

44 miles · Feb 24, 2011
Power Train

ON 2/23/11 I PURCHASED A 2011 CHEVROLET SILVERADO 1500 AND DROVE 40 MILES HOME WHEN I ACTIVATED ONSTAR 2/24/11 I WAS INFORMED THE VEHICLE HAD A DANGEROUS REAR AXLE CONDITION AND NOT TO DRIVE THE VEHICLE.WHY IS NATIONAL HIGHWAY ALLOWING GENERAL MOTORS TO SELL A VEHICLE HAVING THIS DEFECT TO A CUSTOMER WITHOUT REPAIRING THE VEH…

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ON 2/23/11 I PURCHASED A 2011 CHEVROLET SILVERADO 1500 AND DROVE 40 MILES HOME WHEN I ACTIVATED ONSTAR 2/24/11 I WAS INFORMED THE VEHICLE HAD A DANGEROUS REAR AXLE CONDITION AND NOT TO DRIVE THE VEHICLE.WHY IS NATIONAL HIGHWAY ALLOWING GENERAL MOTORS TO SELL A VEHICLE HAVING THIS DEFECT TO A CUSTOMER WITHOUT REPAIRING THE VEHICLE BEFORE THE SALE OR DELIVERY. IF ANYONE IS HURT THE LIABILITY WILL GO TO GENERAL MOTORS BUT ALSO TO NATIONAL HIGHWAY FOR ALLOWING THIS TO HAPPEN. I WILL MAKE A EFFORT TO NOTIFY THE MEDIA TO INFORM THEM OF THIS DANGEROUS PRACTICE GM RECALL #10426 PLEASE STOP THIS NOW BEFORE ANYONE IS HURT. *TR

NHTSA ODI #10384414

Mileage unknown · Feb 18, 2011
Power TrainStructure

2011 CHEVROLET SILVERADO. CONSUMER STATES TRANSMISSION CLUNK AND A LEAKY (WATER) DRIVERS CABIN AND EXPRESSES DISCONTENT IN REGARDS TO GM *TGW THE CONSUMER STATED THE VEHICLE HAS BEEN TO THE DEALER 3 TIMES FOR THE TRANSMISSION NOISE. *JB THE CONSUMER STATED GM BOUGHT THE VEHICLE BACK AND FURNISHED HIM WITH A NEW VEHICLE. HOWE…

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2011 CHEVROLET SILVERADO. CONSUMER STATES TRANSMISSION CLUNK AND A LEAKY (WATER) DRIVERS CABIN AND EXPRESSES DISCONTENT IN REGARDS TO GM *TGW THE CONSUMER STATED THE VEHICLE HAS BEEN TO THE DEALER 3 TIMES FOR THE TRANSMISSION NOISE. *JB THE CONSUMER STATED GM BOUGHT THE VEHICLE BACK AND FURNISHED HIM WITH A NEW VEHICLE. HOWEVER, THERE WAS NO HEAT IN THE VEHICLE. IT WAS DISCOVERED THE INLET HOSE WAS INSTALLED UPSIDE DOWN DURING MANUFACTURING. THE CONSUMER ALSO STATED THE NEW TRUCK ALSO EXHIBITED THE SAME TRANSMISSION PROBLEM. UPDATED 04/08/11

NHTSA ODI #10383691

Official recalls

4

21V050000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2007-2011 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, Yukon XL, and 2009-2011 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500 and Sierra 3500 vehicles originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." Additionally, GM is recalling certain 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, Yukon XL vehicles originally sold, or ever registered, in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 22, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on March 1, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328760.

21V054000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A." Additionally GM is recalling certain 2011-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, Yukon XL and 2011-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AZ, AR, DE, DC, IL, IN, KS, KY, MD, MO, NE, NV, NJ, NM, NC, OH, OK, PA, TN, VA, and WV or "Zone B." Additionally, GM is recalling certain 2010-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL and 2010-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 25, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed to 40 VIN owners on May 11, 2021. A second owner notification letter was mailed to all other owners on January 24, 2022. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328800.

11V007000 · Suspension:rear:axle:spindle

Jan 6, 2011

GENERAL MOTORS IS RECALLING CERTAIN MODEL YEAR 2011 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT; CHEVROLET AVALANCHE, COLORADO, EXPRESS, SILVERADO, SUBURBAN, TAHOE; AND GMC CANYON, SIERRA, SAVANA, YUKON AND YUKON XL VEHICLES. THE REAR AXLE CROSS PINS WERE NOT PROPERLY HEAT TREATED AND COULD FRACTURE AND BECOME DISPLACED WITHIN THE REAR AXLE. SHOULD THE PIN SHIFT OUT OF POSITION, IT COULD CREATE AN INTERFERENCE CONDITION AND CAUSE THE REAR AXLE TO LOCK.

Consequence & remedy

Consequence: THE DRIVER MAY NOT BE ABLE TO MAINTAIN DIRECTIONAL CONTROL OF THE VEHICLE AND A CRASH COULD OCCUR WITHOUT WARNING.

Remedy: DEALERS WILL INSTALL A NEW REAR AXLE CROSS PIN FREE OF CHARGE. THE SAFETY RECALL BEGAN ON JANUARY 11, 2011. OWNERS MAY CONTACT CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463 AND AT THE OWNER CENTER AT WWW.GMOWNERCENTER.COM.

10V643000 · Suspension:rear:axle:spindle

Dec 17, 2010

GENERAL MOTORS IS RECALLING CERTAIN MODEL YEAR 2011 CADILLAC ESCALADE EXT, CHEVROLET AVALANCHE, SILVERADO LD AND GMC SIERRA LD VEHICLES. THE REAR AXLE CROSS PINS WERE NOT PROPERLY HEAT TREATED AND COULD FRACTURE AND BECOME DISPLACED WITHIN THE REAR AXLE. SHOULD THE PIN SHIFT OUT OF POSITION, IT COULD CREATE AN INTERFERENCE CONDITION AND CAUSE THE REAR AXLE TO LOCK.

Consequence & remedy

Consequence: THE DRIVER MAY NOT BE ABLE TO MAINTAIN DIRECTIONAL CONTROL OF THE VEHICLE AND A CRASH COULD OCCUR WITHOUT WARNING.

Remedy: DEALERS WILL INSTALL A NEW REAR AXLE CROSS PIN FREE OF CHARGE. THE SAFETY RECALL BEGAN ON JANUARY 11, 2011. OWNERS MAY CONTACT CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463 AND AT THE OWNER CENTER AT WWW.GMOWNERCENTER.COM.

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

2

DP22005 · Pedestrian Alert Sounds

Opened Jan 27, 2023 · Closed Aug 7, 2023

Status: closed (inferred from source dates) · Electrical System:propulsion System

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.

EA21002 · Desiccated Air Bag Inflator Rupture

Opened Sep 17, 2021 · No close date supplied

Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Additional source detail variants (2)

Air Bags:frontal:driver Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.