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2010 Chevrolet Silverado 1500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2010 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

167 reports with mileage · 195 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 197 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 38 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 32 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 reports1 fire reports8 injury reports

Seats complaints

5 reports
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110,000 miles · Apr 5, 2018
Seats

WHILE DRIVING OR STATIONARY, WHEN PRESSURE IS APPLIED TO THE DRIVERS SIDE SEAT BACK IT INSTANTLY GOES TO THE FULLY RECLINED POSITION! SOMETHING INTERNAL TO THE SEAT BACK ADJUSTER LETS LOOSE/MALFUNCTIONS. TWO TIMES NOW WHILE I'M DRIVING I LEAN BACK TO TAKE SOMETHING OUT OF MY POCKET AND THE SEAT GOES FULLY RECLINED. THE NATURAL I…

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WHILE DRIVING OR STATIONARY, WHEN PRESSURE IS APPLIED TO THE DRIVERS SIDE SEAT BACK IT INSTANTLY GOES TO THE FULLY RECLINED POSITION! SOMETHING INTERNAL TO THE SEAT BACK ADJUSTER LETS LOOSE/MALFUNCTIONS. TWO TIMES NOW WHILE I'M DRIVING I LEAN BACK TO TAKE SOMETHING OUT OF MY POCKET AND THE SEAT GOES FULLY RECLINED. THE NATURAL INSTINCT IS TO PULL ON THE STEERING WHEEL TO KEEP FROM FALLING BACKWARDS, AND THIS CAUSES THE TRUCK TO SWERVE. VERY DANGEROUS!!!!!

NHTSA ODI #11083456

3,000 miles · May 23, 2016
Air BagsSeatsUnknown Or Other

OUR TRUCK HAS A CRACK/HOLE IN THE DASH, RIGHT SIDE. A/C "RECYCLE" AIR DOESN'T WORK FROM DAY ONE; CONSTANTLY SMELL EXHAUST. REAR 60/40 SEAT RATTLES WHETHER UP/DOWN. FRONT PASSENGER DOOR OUTSIDE HANDLE BROKE; CHEAP QUALITY PLASTIC; SEAT CUSHION BOTTOM NOT HOLDING UP, ALREADY WORN. MOISTURE IN THE WHITE REVERSE LIGHTS.

NHTSA ODI #10870412

44,000 miles · Oct 18, 2013
Seats

THE LEATHER DRIVER SEAT DEVELOPED A SMALL TEAR FROM LIMITED WEAR AND TEAR. BEING OUT OF WARRANTY, I HAVE TO BEAR THE COST OF POOR QUALITY WORKMANSHIP ON A VEHICLE THAT IS $47,000. I HAVE DONE EVERYTHING POSSIBLE TO AVOID IT TEARING FURTHER, BUT ENTERING AND EXITING THE VEHICLE STRAINS THE TEAR AREA AND IT SLOWLY GETS WORSE. *…

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THE LEATHER DRIVER SEAT DEVELOPED A SMALL TEAR FROM LIMITED WEAR AND TEAR. BEING OUT OF WARRANTY, I HAVE TO BEAR THE COST OF POOR QUALITY WORKMANSHIP ON A VEHICLE THAT IS $47,000. I HAVE DONE EVERYTHING POSSIBLE TO AVOID IT TEARING FURTHER, BUT ENTERING AND EXITING THE VEHICLE STRAINS THE TEAR AREA AND IT SLOWLY GETS WORSE. *TR

NHTSA ODI #10548455

Mileage unknown · Jun 30, 2011
Seats

TL* THE CONTACT OWNS A 2010 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE DRIVER AND PASSENGER SIDE SEAT BRACKETS WERE RUSTING. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THE DEALER SENT PHOTOS TO THE MANUFACTURER. THE CONTACT STATED THE VEHICLE HAS A FIVE YEAR, FIFTY-THOUSAND MILE RUST AND CORROSION WARRANTY BUT TH…

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TL* THE CONTACT OWNS A 2010 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE DRIVER AND PASSENGER SIDE SEAT BRACKETS WERE RUSTING. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THE DEALER SENT PHOTOS TO THE MANUFACTURER. THE CONTACT STATED THE VEHICLE HAS A FIVE YEAR, FIFTY-THOUSAND MILE RUST AND CORROSION WARRANTY BUT THE MANUFACTURER WOULD NOT HONOR THE WARRANTY. THE CONTACT WAS CONCERNED THAT THE SEAT WOULD NOT BE HELD IN PLACE OVER A PERIOD OF TIME. THE FAILURE MILEAGE WAS UNKNOWN AND THE CURRENT MILEAGE WAS 26,000. UPDATED 9/27/11 *CN UPDATED 3/22/12 *CN

NHTSA ODI #10410098

Mileage unknown · Feb 12, 2011
Seats

2010 CHEVROLET SILVERADO 1500 Z71 LT EXT. CAB, DRIVER FRONT SEAT FOAM DEALERSHIP SAID THEY REPLACED, BUT THE SEAT IS ANGLED TO THE LEFT AND THE SEAT BACK (WHAT YOU LEAN BACK ON), IS LEANING BACK ON THE LEFT. SEAT BELT CROSSES OVER LEFT BREAST AROUND YOUR NECK. THE SEAT (WHAT YOU SIT ON) SLANTS DOWN ON THE LEFT. THIS THROWS YOU…

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2010 CHEVROLET SILVERADO 1500 Z71 LT EXT. CAB, DRIVER FRONT SEAT FOAM DEALERSHIP SAID THEY REPLACED, BUT THE SEAT IS ANGLED TO THE LEFT AND THE SEAT BACK (WHAT YOU LEAN BACK ON), IS LEANING BACK ON THE LEFT. SEAT BELT CROSSES OVER LEFT BREAST AROUND YOUR NECK. THE SEAT (WHAT YOU SIT ON) SLANTS DOWN ON THE LEFT. THIS THROWS YOUR WHOLE BODY OFF BALANCE DRIVING DOWN THE ROAD AND YOU ARE AT AN AWKWARD POSITION DRIVING IN MY VEHICLE AND THE DEALERSHIP SAID THEY HAVE DONE ALL THEY CAN DO TO REMEDY THE PROBLEM. MY TRUCK WAS PURCHASED BRAND NEW AND SHORTLY AFTER I NOTICED THE FRONT SEAT BACK WAS TWISTED TOWARD THE FRONT AND I TOOK IT BACK AND THAT IS WHEN ALL THE TROUBLE BEGAN. IF THERE WERE TO BE A COLLISION AND THE AIR BAG IN THE STEERING COLUMN DEPLOY, IT WOULD IN FACT MAKE YOUR HEAD GO OFF THE HEADREST BECAUSE YOUR HEAD IS AT THE EDGE ON THE LEFT. I RECEIVED A LETTER FROM THE DEALERSHIP THAT THE SEAT MEETS GM SPECIFICATIONS, BUT I HAVE HAD THREE DIFFERENT PEOPLE SIT IN THE SEAT AND ALL SAY IT IS CROOKED. I HAVE CALLED THE GMC CUSTOMER SERVICE DEPARTMENT AND NOW I HAVE TO TAKE THE TRUCK BACK TO THE DEALERSHIP AGAIN ON MONDAY FOR THE SAME PROBLEM, SO A REPRESENTATIVE CAN INSPECT THE VEHICLE. I WAS TOLD THAT THIS TRUCK COULD BE FIXED, BUT THE PROBLEM IS WORSE AND NOW THE SEAT DOES NOT GO BACK AS FAR AS IT DID WHEN NEW AND THE WHOLE DRIVER SIDE AUTOMATIC SEAT LOOKS LIKE IT HAS BEEN SWITCHED OUT AND I KNOW IT HAS THREE DIFFERENT TIMES BECAUSE THE SEAT LOOKS WARN AND THE FOAM IS SQUASHED DOWN AND THE PADDING IN THE BACK AND FRAME WIGGLE AROUND. THE SEAT IN MY TRUCK, WHEN I PURCHASED IT, WERE FIRM AND NOW THEY ARE LOOSE. POPPING NOISES I KEEP HEARING, LIKE SOMETHING IS BREAKING LOOSE, UNDER THE SEAT. THE LUMBAR, IF YOU CAN SIT STRAIGHT UP, HITS YOU IN YOURBACK, RIGHT SIDE AT LUMBAR AND LEFT SIDE WAY ABOVE YOUR HIP. WHAT DOES THIS TELL YOU? BUT, I FEEL, SINCE I PAID CASH FOR THIS VEHICLE, THAT THEY WILL NOT FIX ANYTHING AND IT ONLY HAS ABT. 10,800 MILES ON IT. *TR

NHTSA ODI #10381698

Official recalls

3

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.

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.

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.