NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
6 reportsClear category filter121,000 miles · May 24, 2013
Engine And Engine CoolingPower Train
OIL CONSUMPTION - AFTER ADVISING TERRY LABONTE CHEVROLET (GREENSBORO, NC) OF OIL CONSUMPTION ISSUES FROM 60K THRU 99K AND FORMER DIAGNOSTICS COMPLETED BY COLLINS CHEVROLET (MT. AIRY, NC) @ 55K 59K & 60K GM IS UNWILLING TO MAKE REPAIR UNDER WARRANTY AT 121K STATING THAT NO NOTES WERE RECORDED OF INCIDENTS UPON PRIOR NOTIFICATION.…
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OIL CONSUMPTION - AFTER ADVISING TERRY LABONTE CHEVROLET (GREENSBORO, NC) OF OIL CONSUMPTION ISSUES FROM 60K THRU 99K AND FORMER DIAGNOSTICS COMPLETED BY COLLINS CHEVROLET (MT. AIRY, NC) @ 55K 59K & 60K GM IS UNWILLING TO MAKE REPAIR UNDER WARRANTY AT 121K STATING THAT NO NOTES WERE RECORDED OF INCIDENTS UPON PRIOR NOTIFICATION. DEALERSHIP STATED REPAIR REQUIRE PISTON REBUILD FOR $5100 GM REP APPROVED REPAIR FOR $1365. GM CUST CARE UNWILLING TO COVER REPAIR AND HAS DISREGARDED PRIOR DOCUMENTATION OF COMPLAINT AT 55K, 59K, & 60K. DEALERSHIP ARE AWARE OF PROBLEMATIC 5.3 STATING UPON DESCRIPTION OF ISSUE WITHOUT REVIEW OF RECORDS THAT VEHICLE IS 07. *TR
NHTSA ODI #10513479
47,500 miles · May 4, 2012
Engine And Engine Cooling
I PURCHASED MY SUBURBAN WITH EXISTING GM WARRANTY. THE VEHICLE HAD ROUGHLY 47,000 MILES ON IT AND 7 MONTHS REMAINING OF THE ORIGINAL FACTORY WARRANTY. AFTER ABOUT 900 MILES THE LOW OIL LIGHT CAME ON, WHICH I THOUGHT WAS ODD BECAUSE I CHECKED THE OIL LIFE GAUGE AFTER PURCHASE AND IT SAID IT WAS AT 99% OIL LIFE. THIS WORRIED ME. …
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I PURCHASED MY SUBURBAN WITH EXISTING GM WARRANTY. THE VEHICLE HAD ROUGHLY 47,000 MILES ON IT AND 7 MONTHS REMAINING OF THE ORIGINAL FACTORY WARRANTY. AFTER ABOUT 900 MILES THE LOW OIL LIGHT CAME ON, WHICH I THOUGHT WAS ODD BECAUSE I CHECKED THE OIL LIFE GAUGE AFTER PURCHASE AND IT SAID IT WAS AT 99% OIL LIFE. THIS WORRIED ME. IT WAS ONE QUART LOW SO I ADDED IT AND DECIDED TO SEE WHAT HAPPENS. A MONTH LATER AT ABOUT 1000 MILES THE SAME THING HAPPENED. I ADDED ANOTHER QUART AND THEN WENT TO THE DEALER CLOSEST TO MY HOME TO REPORT THE ISSUE. THEY STARTED MONITORING. EACH TIME AT BETWEEN 900 AND 1400 THE OIL LIGHT CAME ON AND I WAS A QUART LOW. THEY BEGAN REMEDIATION. FIRST THE PVC/VALVE COVER REMEDIATION. THIS DID NOT SOLVE THE PROBLEM. THEN NEXT THE OIL PAN RELATED REMEDIATION. THIS DID NOT SOLVE THE ISSUE EITHER. NOW I KEEP HAVING TO TAKE THE SUBURBAN TO THE DEALER WHEN THE OIL LIGHT COMES ON, THEY ADD A QUART AND SAY THERE IS NOTHING THEY CAN DO, FROM A LEGAL STAND POINT BECAUSE I HAVE AN EXTENDED WARRANTY AND THE CAR IS OUT OF GM WARRANTY (REMEMBER I REPORTED THIS WHILE IT WAS UNDER GM WARRANTY AND REMINDED THEM OF THAT), THAT GM WON'T DO ANYTHING MORE FROM THEIR EXPERIENCE WITH THIS ISSUE. HOWEVER, THEY HAVE NOT CONTACTED GM OR OPENED A CASE FILE AND WONT DO THAT. I WAS TOLD I WILL NEED TO PURSUE THAT ON MY OWN. THEY TRIED TO REACH OUT TO MY EXTENDED WARRANTY BUT SAY THEY ARE PUT ON HOLD FOR 10-15 MINUTES AND HAVE TO HANG UP BECAUSE THEY ARE TOO BUSY TO WAIT LONGER. I'VE CALLED THEM REPEATEDLY ASKING THAT A CASE BE OPENED WITH GM AS THIS WAS REPORTED UNDER WARRANTY AND IS A KNOWN DEFECT WITH THIS ENGINE (I'M OUT OF WARRANTY NOW) BUT THEY JUST KEEP GIVING ME THE RUN AROUND. GM NEEDS TO DO A RECALL AND ADDRESS THESE ENGINES. *TR
NHTSA ODI #10457463
63,000 miles · Sep 2, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2007 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE VEHICLE WOULD CONSUME UP TO THREE QUARTS OF OIL EVERY THREE THOUSAND MILES. THE CONTACT STATED THE VEHICLE HAS NOT SUFFERED ANY DAMAGES DUE TO THE EXCESSIVE OIL CONSUMPTION. THE CONTACT TOOK THE VEHICLE TO THE DEALER TO DIAGNOSE THE OIL PROBLEM WHERE T…
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TL* THE CONTACT OWNS A 2007 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE VEHICLE WOULD CONSUME UP TO THREE QUARTS OF OIL EVERY THREE THOUSAND MILES. THE CONTACT STATED THE VEHICLE HAS NOT SUFFERED ANY DAMAGES DUE TO THE EXCESSIVE OIL CONSUMPTION. THE CONTACT TOOK THE VEHICLE TO THE DEALER TO DIAGNOSE THE OIL PROBLEM WHERE THE DEALER ADVISED THAT THEY WOULD REPLACE THE PISTONS AND PISTON RINGS. THE CONTACT STATED THAT THE REPAIR POSSIBLY WOULD NOT REMEDY THE ISSUE OF THE OIL CONSUMPTION. THE FAILURE MILEAGE WAS 63,000. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #10423019
80,000 miles · Nov 9, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2007 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED. THE CONTACT WAS INFORMED THAT THERE WAS A LEAK AND THE EVAPORATION VENT AND FILTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE VEHICLE BEGAN BURNING OIL AND THE CONTACT HAD TO REFILL THE OIL EVERY TEN DAYS. THE CON…
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TL*THE CONTACT OWNS A 2007 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED. THE CONTACT WAS INFORMED THAT THERE WAS A LEAK AND THE EVAPORATION VENT AND FILTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE VEHICLE BEGAN BURNING OIL AND THE CONTACT HAD TO REFILL THE OIL EVERY TEN DAYS. THE CONTACT CALLED THE MANUFACTURER WHO OFFERED NO ASSISTANCE. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 80,000 AND THE CURRENT MILEAGE WAS APPROXIMATELY 106,000.
NHTSA ODI #10365089
32,000 miles · Aug 17, 2010
Engine And Engine Cooling
I HAVE A 2007 SUBURBAN THAT CONSUMES APPROX 1 QT OF OIL EVERY 800 MILES. AT 1200 MILES/QT THE DEALER TOLD ME THIS WAS "NORMAL CONSUMPTION". I WENT TO ANOTHER DEALER THAT CONFIRMED THE 800 MILES/QT AND IS INSTALLING NEW PISTONS AND RINGS NEXT WEEK. APPARENTLY THIS IS NOT A FIX BUT SHOULD HELP WITH CONSUMPTION UNTIL A PERMANENT FI…
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I HAVE A 2007 SUBURBAN THAT CONSUMES APPROX 1 QT OF OIL EVERY 800 MILES. AT 1200 MILES/QT THE DEALER TOLD ME THIS WAS "NORMAL CONSUMPTION". I WENT TO ANOTHER DEALER THAT CONFIRMED THE 800 MILES/QT AND IS INSTALLING NEW PISTONS AND RINGS NEXT WEEK. APPARENTLY THIS IS NOT A FIX BUT SHOULD HELP WITH CONSUMPTION UNTIL A PERMANENT FIX IS MADE BY GM. *TR
NHTSA ODI #10350132
21,000 miles · Jun 16, 2009
Engine And Engine Cooling
ENGINE CONSUMING OIL. *TR
NHTSA ODI #10274034
Official recalls
4Feb 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.
Feb 5, 2021
General Motors, LLC (GM) is recalling certain 2009 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500, Sierra 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 2007-2008 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, 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." 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 23, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on September 20, 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 N212328780.
Jun 4, 2010
GM IS RECALLING CERTAIN MODEL YEAR 2006-2009 BUICK, LUCERNE; CADILLAC DTS; HUMMER H2; MODEL YEAR 2008-2009 BUICK ENCLAVE; CADILLAC CTS; MODEL YEAR 2007-2009 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT; CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE; GMC ACADIA, SIERRA, YUKON, YUKON XL; SATURN OUTLOOK; AND MODEL YEAR 2009 CHEVROLET TRAVERSE VEHICLES EQUIPPED WITH A HEATED WASHER FLUID SYSTEM (HWFS). A RECALL WAS IMPLEMENTED IN 2008 TO ADD A FUSE TO THE CONTROL CIRCUIT HARNESS TO ADDRESS THE POTENTIAL CONSEQUENCES OF A PRINTED CIRCUIT BOARD (PCB) ELECTRICAL SHORT. HOWEVER, THERE HAVE BEEN NEW REPORTS OF THERMAL INCIDENTS ON HWFS MODULES AFTER THIS IMPROVEMENT WAS INSTALLED. THESE INCIDENTS RESULTED FROM A NEW FAILURE MODE ATTRIBUTED TO THE DEVICE'S THERMAL PROTECTION FEATURE. THE SIGNIFICANCE VARIES FROM MINOR DISTORTION TO CONSIDERABLE MELTING OF THE PLASTIC AROUND THE HWFS FLUID CHAMBER.
Consequence & remedy
Consequence: IT IS POSSIBLE FOR THE HEATED WASHER MODULE TO IGNITE AND A FIRE MAY OCCUR.
Remedy: DEALERS WILL PERMANENTLY DISABLE AND REMOVE THE HEATED WASHER FLUID MODULE. AN UPDATED PAGE FOR THE OWNER MANUAL WILL BE PROVIDED AND INSERTED IN THE OWNER MANUAL TO DOCUMENT THAT THE FEATURE HAS BEEN PERMANENTLY DISABLED AND REMOVED FROM THE VEHICLE. THE SAFETY RECALL BEGAN ON JUNE 11, 2010. OWNERS MAY CONTACT BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, SATURN AT 1-800-972-8876, GMC AT 1-866-996-9463 AND HUMMER AT 1-800-732-5493 OR AT THE OWNER CENTER AT WWW.GMOWNERCENTER.COM.
Aug 28, 2008
GM IS RECALLING 857,735 MY 2006-2008 BUICK LUCERNE; CADILLAC DTS; HUMMER H2; MY 2007-2008 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT; CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE; GMC ACADIA, SIERRA, YUKON, YUKON XL, SATURN OUTLOOK; AND MY 2008 BUICK ENCLAVE VEHICLES EQUIPPED WITH A HEATED WIPER WASHER FLUID SYSTEM. A SHORT CIRCUIT ON THE PRINTED CIRCUIT BOARD FOR THE WASHER FLUID HEATER MAY OVERHEAT THE CONTROL-CIRCUIT GROUND WIRE.
Consequence & remedy
Consequence: THIS MAY CAUSE OTHER ELECTRICAL FEATURES TO MALFUNCTION, CREATE AN ODOR, OR CAUSE SMOKE INCREASING THE RISK OF A FIRE.
Remedy: DEALERS WILL INSTALL A WIRE HARNESS WITH AN IN-LINE FUSE FREE OF CHARGE. THE RECALL BEGAN ON SEPTEMBER 12, 2008. OWNERS MAY CONTACT BUICK AT 1-866-608-8080; CADILLAC AT 1-800-982-2339 OR HTTP://WWW.CADILLAC.COM; CHEVROLET AT 1-800-630-2438; SATURN AT 1-800-972-8876 OR HTTP://WWW.SATURN.COM, GMC AT 1-866-996-9436; OR HUMMER AT 1-800-732-5493; OR THROUGH THEIR WEBSITE AT <A HREF=HTTP://WWW.GMOWNERCENTER.COM>HTTP://WWW.GMOWNERCENTER.COM</A> .
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
1EA21002 · 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.
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