← New search

2013 GMC Sierra 1500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2013 GMC Sierra 1500 do not stand out strongly from the model-year median of 181.

About this comparison →

How this year compares

Owner complaints by model year

Compare all Sierra 1500 years →

Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

67 reports with mileage · 48 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 35 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Suspension. Review the 10 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

2 crash reports1 fire reports3 injury reports

Suspension complaints

10 reports
Clear category filter
Mileage unknown · Dec 22, 2025
Suspension

Failure of frame on left side of vehicle between frame rail and fuel tank. For a approx 10 year old vehicle that is garaged and does not drive in inclement weather this SHOULD NOT be happening.

NHTSA ODI #11706633

Mileage unknown · Aug 19, 2024
SuspensionUnknown Or Other

I hit a bump and both rear shock mounts blew off the rear cross member because the frame is rusted out despite having rust protection. It is available for inspection. The truck then began bouncing wildly. Meanwhile the underside of the bed isn't rusted at all, not one speck. It just seems weird to me, reminds me of the Toyota fr…

Read full complaint

I hit a bump and both rear shock mounts blew off the rear cross member because the frame is rusted out despite having rust protection. It is available for inspection. The truck then began bouncing wildly. Meanwhile the underside of the bed isn't rusted at all, not one speck. It just seems weird to me, reminds me of the Toyota frame problems from a while back. It has not been inspected by a mechanic or insurance, my insurance company didn't seem to care in the slightest. I have had traction control and abs warnings on for a while but my mechanic said that was a faulty tire sensor.

NHTSA ODI #11609433

Mileage unknown · Dec 22, 2023
StructureSuspension

Rear half of Frame Crossmembers rotted away between the Frame rails. Took vehicle in for routine safety inspection, and the mechanic determined that the cross members to which the rear shocks and the Gas tank were attached had both broken free from the frame rails due to rust. The entire back end of the vehicle is suspended fr…

Read full complaint

Rear half of Frame Crossmembers rotted away between the Frame rails. Took vehicle in for routine safety inspection, and the mechanic determined that the cross members to which the rear shocks and the Gas tank were attached had both broken free from the frame rails due to rust. The entire back end of the vehicle is suspended from the frame with only the leaf spring mounts. This rust is excessive and far exceeds the rust on other points on the frame and undercarriage of the vehicle.

NHTSA ODI #11561513

Mileage unknown · Jun 14, 2023
Suspension

I have been told by an independent Maine state inspection company that my left front frame rail has perforating corrosion and will not pass inspection. I have not had GMC inspect this yet but I do not think they will repair it. This truck is 10 years old and only has 59,000 miles on it. It looks like new (except for some rear bu…

Read full complaint

I have been told by an independent Maine state inspection company that my left front frame rail has perforating corrosion and will not pass inspection. I have not had GMC inspect this yet but I do not think they will repair it. This truck is 10 years old and only has 59,000 miles on it. It looks like new (except for some rear bumper damage) It is unusable now and I'm afraid the left front suspension will collapse. This is completely unacceptable. Please help, Thank you.

NHTSA ODI #11526999

90,000 miles · Apr 25, 2023
StructureSuspension

The contact owns a 2013 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the contact was alerted by another motorist that the spare tire had lowered underneath the vehicle. After stopping to inspect the vehicle, it was discovered that the rear cross members had corroded, causing the spare tire to b…

Read full complaint

The contact owns a 2013 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the contact was alerted by another motorist that the spare tire had lowered underneath the vehicle. After stopping to inspect the vehicle, it was discovered that the rear cross members had corroded, causing the spare tire to become unsecured underneath the vehicle. Additionally, while driving over bumps in the roadway, the vehicle became unstable due to the corroded rear suspension. The vehicle was taken to the local mechanic who diagnosed that the rear sub frame needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were not notified of the failure. The failure mileage was approximately 90,000.

NHTSA ODI #11518815

Mileage unknown · May 29, 2022
Suspension

Passenger side leaf spring "failed"- the middle "stiffener" rear section broke off/ fell to the road (see picture below with leaf spring removed). Fortunately, I was turning into side street doing about 15mph negating any safety issues- things could have been much different if at highway speeds. The truck had some signific…

Read full complaint

Passenger side leaf spring "failed"- the middle "stiffener" rear section broke off/ fell to the road (see picture below with leaf spring removed). Fortunately, I was turning into side street doing about 15mph negating any safety issues- things could have been much different if at highway speeds. The truck had some significant miles (125k) but they were 95% highway miles though I do considerable highway miles with "treated" roads over Washington state passes. Vehicle was repaired by Haselwood GMC/Chev Dealership in Bremerton, Wa. on 5/25/22. Maintenance/Repair supervisor chalked it up to routine wear and tear.

NHTSA ODI #11466591

100,800 miles · Jul 15, 2019
Suspension

I WAS UNDERNEATH MY TRUCK FOR A MINOR SENSOR REPAIR AROUND THE END OF MARCH. I FOUND A SIGNIFICANT HOLE RUSTED THROUGH THE LEFT FRAME RAIL. I MADE CONTACT WITH GENERAL MOTORS ABOUT THE SEVERITY OF RUST IN AND ON MY FRAME. THEY HAD A LOCAL DEALERSHIP EVALUATE THE FRAME. AFTER SEVERAL PEOPLE AND MANY WEEKS. THE BEST GM IS WILLING…

Read full complaint

I WAS UNDERNEATH MY TRUCK FOR A MINOR SENSOR REPAIR AROUND THE END OF MARCH. I FOUND A SIGNIFICANT HOLE RUSTED THROUGH THE LEFT FRAME RAIL. I MADE CONTACT WITH GENERAL MOTORS ABOUT THE SEVERITY OF RUST IN AND ON MY FRAME. THEY HAD A LOCAL DEALERSHIP EVALUATE THE FRAME. AFTER SEVERAL PEOPLE AND MANY WEEKS. THE BEST GM IS WILLING TO DO IS OFFER A $100.00 SERVICE VOUCHER. THIS A A TRUCK ,THAT HAULS ,TOWS AND CARRIES LOADS AND FAMILY. I DO NOT BELIEVE IN 6 YEARS AND 100800 MILES THE FRAME SHOULD HAVE TO BE WELDED. GM SAYS THAT MY PERFORATION WARRANTY EXPIRED IN NOVEMBER OR 100400 MILE. THIS IS A MAJOR SAFTEY ISSUE. TOYOTA ADDRESSED THERE FRAME ISSUE WHY IS GENERAL MOTORS ANY DIFFERENT? I WOULD APPRECIATE AN INVESTIGATION INTO THIS !!@

NHTSA ODI #11231947

82,000 miles · Apr 15, 2019
StructureSuspensionUnknown Or Other

ON 3/4/2018 I TOOK MY TRUCK IN FOR A BROKEN LEAF SPRING. WHEN THE MECHANIC WAS REPLACING THE SPRINGS, HE NOTES HOLES RUSTING IN THE TRUCKS FRAME. I DID BUY THE TRUCK USED FROM A CHEVROLET DEALER ON 3/12 2016 WITH @49,000 MILES ON IT. WITH IN 6-8 MONTHS OF OWNING THE TRUCK, IT STARTED TO RUST ON THE FENDER WELLS, AND HAD SOME RUS…

Read full complaint

ON 3/4/2018 I TOOK MY TRUCK IN FOR A BROKEN LEAF SPRING. WHEN THE MECHANIC WAS REPLACING THE SPRINGS, HE NOTES HOLES RUSTING IN THE TRUCKS FRAME. I DID BUY THE TRUCK USED FROM A CHEVROLET DEALER ON 3/12 2016 WITH @49,000 MILES ON IT. WITH IN 6-8 MONTHS OF OWNING THE TRUCK, IT STARTED TO RUST ON THE FENDER WELLS, AND HAD SOME RUST ON THE FRAME. WHEN I TALKED TO THE DEALER THEY SAID THERE IS NOTHING THEY CAN DO FOR ME BECAUSE THE 6 YEAR OR 100,000 MILE WARRANTY RAN OUT ON 10/1/2018. I CALLED GMC CUSTOMER CARE ABOUT THIS AND THEY DID OPEN A SERVICE REQUEST [XXX]. ON 4/8/2019 SERVICE MANAGER FOR THE DEALER TOLD ME THE GME WILL DO NOTHING FOR ME BECAUSE IT WILL COST $12,000.00 TO REPLACE FRAME BET MAY OFER ME A CERTIFICATE FOR $1000.00 TOWARDS A NEW TRUCKS. I FELL THIS IS UNEXCEPTIONABLE TO ME BECAUSE THE SAFETY OF ME AND MY FAMILY WHEN WE ARE IN THE TRUCK. WE BROUGHT THE TRUCK BECAUSE IN HAS A GOOD SAFETY RATING BE WITH HOLES RUSTING IN THE FRAME I FELL MY SAFETY IS COMPROMISED EVERY TIME I DRIVE IT. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TT

NHTSA ODI #11196575

100,000 miles · Apr 8, 2019
StructureSuspensionUnknown Or Other

I WENT UNDERNEATH MY SIERRA TODAY AND FOUND THE ENTIRE FRAME IS EXTREMELY RUSTED. UPON CLOSER EXAMINATION I FOUND A 3 INCH BY 3/4 INCH HOLE RUSTED THROUGH. THIS TRUCK JUST TURNED 6 YEARS OLD AND HAS 100000 MILES . THIS IS A SAFTEY ISSUE BECAUSE WITH THE TRUCK BEING ABLE TO TOW HEAVY LOADS.

NHTSA ODI #11194762

127,000 miles · Apr 25, 2018
Suspension

TL* THE CONTACT OWNS A 2013 GMC SIERRA 1500. WHILE THE VEHICLE WAS BEING INSPECTED AT AN UNKNOWN DEALER IN APPOMATTOX, VA, THE TECHNICIAN INFORMED THE CONTACT THAT THE IDLER ARM, TIE ROD END, AND THE PITMAN ARMS NEEDED TO BE REPLACED. THE TECHNICIAN STATED THAT THE PARTS WERE NOT LUBRICATED. THE VEHICLE WAS REPAIRED. THE MANUFAC…

Read full complaint

TL* THE CONTACT OWNS A 2013 GMC SIERRA 1500. WHILE THE VEHICLE WAS BEING INSPECTED AT AN UNKNOWN DEALER IN APPOMATTOX, VA, THE TECHNICIAN INFORMED THE CONTACT THAT THE IDLER ARM, TIE ROD END, AND THE PITMAN ARMS NEEDED TO BE REPLACED. THE TECHNICIAN STATED THAT THE PARTS WERE NOT LUBRICATED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND INFORMED THE CONTACT TO CALL NHTSA. THE APPROXIMATE FAILURE MILEAGE WAS 127,000.

NHTSA ODI #11090052

Official recalls

3

21V053000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2013 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL 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 2010 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and 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." Additionally, GM is recalling certain 2009 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C."

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 24, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on May 11, 2021. Owners may contact Cadillac customer service at 1-800-458-8006; Chevrolet customer service at 1-800-222-1020; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328790.

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.

18V267000 · Equipment

Apr 26, 2018

General Motors LLC (GM) is recalling certain 2009-2014 Chevrolet Silverado HD and GMC Sierra HD, 2009 GMC Topkick 5000, 6000, 7000 and 8000 Series and Isuzu F Series, and 2009-2018 Chevrolet Express, and GMC Savana vehicles, equipped with certain Plastic-Handle Fire Extinguishers or Push Button 'Pindicator' Fire Extinguishers. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or requiring excessive force to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17E062-5427.pdf

Consequence & remedy

Consequence: In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.

Remedy: GM will notify owners, instructing them to contact Kidde to get a replacement fire extinguisher, free of charge. The recall began June 11, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020, GMC customer service at 1-800-462-8782, and Isuzu customer service at 1-866-441-9638. GM's number for this recall is 18146.

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.