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2009 Nissan Cube

Owner reports · Recalls · Investigations

More warning signs than most Cube years

Owner complaints for the 2009 Nissan Cube are substantially higher than the model-year median of 25.

About this comparison →

When problems were reported

Mileage at the reported incident

79 reports with mileage · 22 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Steering. Review the 23 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 22 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 20 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 reports2 fire reports3 injury reports

Engine complaints

15 reports
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Mileage unknown · Mar 10, 2015
EngineService BrakesSteering

MY WIFE'S 2009 NISSAN CUBE HAS HAD INTERMITTENT ISSUES WITH THE VEHICLE SHUTTING OFF. IT HAS HAPPENED A FEW TIMES IN RUSH HOUR TRAFFIC ON THE HIGHWAY TO AND FROM WORK AND MOST RECENTLY IN A PARKING LOT (LUCKILY) IT LOCKED UP COMPLETELY. MOST TIMES SHE DESCRIBES IT LIKE IT IS STALLING, WHERE SHE IS ABLE TO MOVE OFF TO THE SIDE OF…

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MY WIFE'S 2009 NISSAN CUBE HAS HAD INTERMITTENT ISSUES WITH THE VEHICLE SHUTTING OFF. IT HAS HAPPENED A FEW TIMES IN RUSH HOUR TRAFFIC ON THE HIGHWAY TO AND FROM WORK AND MOST RECENTLY IN A PARKING LOT (LUCKILY) IT LOCKED UP COMPLETELY. MOST TIMES SHE DESCRIBES IT LIKE IT IS STALLING, WHERE SHE IS ABLE TO MOVE OFF TO THE SIDE OF THE ROAD AND IS ABLE TO RESTART THE CAR AFTER A MINUTE OR TWO. A FEW TIMES HOWEVER AFTER COMING TO A COMPLETE STOP, EVERYTHING LOCKED UP. CAR WOULDN'T START, STEERING WHEEL LOCKED, BRAKE PEDAL WOULDN'T EVEN BUDGE. AFTER A MINUTE, IT STARTED RIGHT BACK UP. WHEN WE TOOK IT TO THE DEALER, THEY COULD FIND NOTHING WRONG AND JUST ENDED UP COSTING US "DIAGNOSTIC FEES". READING THROUGH OTHER COMPLAINTS ON HERE ABOUT THIS SAME EXACT ISSUE, I FIND IT HARD TO BELIEVE THAT NISSAN IS NOT AWARE OF SOMETHING OF THIS MAGNITUDE. SEARCHING THE WEB RETURNS NO TYPE OF HELP WHATSOEVER. HOW ARE WE SUPPOSED TO JUST ACCEPT A VEHICLE THAT RANDOMLY SHUTS OFF, THE RESULTS OF WHICH COULD BE FATAL? THERE HAS TO BE SOMETHING THAT CAN BE DONE. *TR

NHTSA ODI #10693324

Mileage unknown · Jan 27, 2015
Engine

EXCESSIVE AND ACCELERATED EXHAUST SYSTEM CORROSION. MUFFLER MOUNTING TO EXHAUST PIPE RUSTED COMPLETELY THROUGH AND FELL APART. HEAT SHIELD MOUNTING BRACKETS RUSTED THROUGH CAUSING HEAT SHIELD TO SEPARATE FROM VEHICLE. EXHAUST FUMES ENTERING DRIVING COMPARTMENT AND DANGEROUS TO OCCUPANTS. *TR

NHTSA ODI #10679082

147,700 miles · Aug 13, 2014
Engine

I PUT MY CAR INTO DRIVE AND THAN PUT MY FOOT ON THE GAS AND NOTHING HAPPENED. I LOOKED DOWN AND I WAS IN "D" AFTER A FEW SECONDS I SHIFTED INTO LOW AND NOTHING HAPPENED. AFTER A FEW SECONDS THE CAR TOOK OFF. *TR I WAS SO SCARED. I SLAMMED ON THE BRAKES. I TRIED AGAIN, I PUT THE CAR INTO DRIVE AND SAT THERE, THAN IT INCHED …

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I PUT MY CAR INTO DRIVE AND THAN PUT MY FOOT ON THE GAS AND NOTHING HAPPENED. I LOOKED DOWN AND I WAS IN "D" AFTER A FEW SECONDS I SHIFTED INTO LOW AND NOTHING HAPPENED. AFTER A FEW SECONDS THE CAR TOOK OFF. *TR I WAS SO SCARED. I SLAMMED ON THE BRAKES. I TRIED AGAIN, I PUT THE CAR INTO DRIVE AND SAT THERE, THAN IT INCHED ALONG AND THAN TOOK OFF AGAIN LIKE I WAS ON A ROLLER COASTER. LUCKILY I WAS A BLOCK FROM THE DEALER. SO I DROVE IT THERE ON A WING AND A PRAYER. IT TOOK ME AT LEAST 10 MINS. I HAD TO MAKE A TURN AND OTHER DRIVERS WERE GOING AROUND ME. BECAUSE MY CAR WASN'T MOVING. ALL OF A SUDDEN IT TOOK OFF AND I ALMOST BROADSIDED A CAR. YOU CAN IMAGINE THE SUGGESTIONS I GOT. THE DEALER HAD IT FOR 2 DAYS AND SAID THEY CAN'T FIND ANYTHING WRONG WITH. I'M GOING TO BRING IT TO ANOTHER MECHANIC AND SEE IF HE CAN FIND WHATS WRONG. *TR

NHTSA ODI #10622001

71,206 miles · Jul 10, 2014
EngineFuel System, GasolineStructure

I HAVE A 2009 NISSAN CUBE. THE CUBE WAS AT THE DEALERSHIP FOR MAINTAINCE. I WAS INFORMED THAT THE CUBE HAS A EXHAUST LEAK, WAS TOLD IT IS NOT COVERED UNDER THE EMISSION WARRANTY. I ASKED MORE QUESTIONS ABOUT THE ISSUE, AN WAS TOLD BY THE DEALERSHIP THAT IT IS A RUST ISSUE AND NOT COVERED. I WAS TOLD THAT THEY DO NOT HAVE THE …

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I HAVE A 2009 NISSAN CUBE. THE CUBE WAS AT THE DEALERSHIP FOR MAINTAINCE. I WAS INFORMED THAT THE CUBE HAS A EXHAUST LEAK, WAS TOLD IT IS NOT COVERED UNDER THE EMISSION WARRANTY. I ASKED MORE QUESTIONS ABOUT THE ISSUE, AN WAS TOLD BY THE DEALERSHIP THAT IT IS A RUST ISSUE AND NOT COVERED. I WAS TOLD THAT THEY DO NOT HAVE THE PART. I AGAIN ASKED ABOUT THE EMISSION WARRANTY, WAS TOLD IT DID NOT APPLY. ACCORDING TO THE WARRANTY WHICH IS COVER UP TO 80K MILES FOR EMISSION ISSUES, BUT BECAUSE OF "RUST" IT IS NOT COVERED. I DO NOT AGREE WITH THIS AND I CALL THE 1 800 NUMBER AND REPORTED IT. TODAY THE NEXT DAY I WAS CONTACTED AND PERSSON SAID, OR AGREED WITH THE DEALERSHIP. I LOOKED UP COMPLAINTS AND RECALLS, THERE ARE SEVERAL COMPLAINTS. THERE IS ONE IN WHICH IT REFERRS TO A "CORRODED" PART. WHAT IS THE DIFFERENCE BETWEEN A PART THAT IS "CORRODED" PART THAT MAY FAIL AND A PART THAT HAS RUST AND BROKEN CAUSING A EXHAUST LEEK. THEY NISSAN AND THE DEALERSHIP ARE USING A PLAY ON WORDS TO AVOID MAKING THE REPAIRS UNDER THE EMISSION WARRANTY. I WAS TOLD IT IS OKAY TO DRIVE AND POLUTE THE ENVIROMENT SINCE THEY WILL NOT COVER IT AND THEY DID NOT HAVE THE PARTS. AFTER SPEAKING WITH THE REP FROM NISSAN HE HAD A WHOLE LOT MORE INFO ABOUT THE REPAIR THAN WAS LISTED ON MY COPY OF THE REPAIR ORDER. THERE ARE FOUR MAJOR COMPONETS OF A EXHAUST SYSTEM ON MOST CARS. THE MANIFOLD, THE DOWN PIPE, THE MID PIPE AND THE MUFFLER. THE "CORRODED PART" OR RUST CAUSED ONE THE CONECTION TO LEEK. NOW I AM BEING TOLD THAT 2 PARTS NEED TO BE REPLACED AND THE COST IS OVER 1K, WHICH I HAVE NO INFOR ON MY INVOICE OR REPAIR ORDER ABOUT. THE ONLY RECOMENDATION WAS 'EHAUST LEAK 395.00" I KNOW THAT DEALSHIPS REPLACE PARTS THAT HAVE RUST AND OR ARE CORRODED BECAUSE I WORK FOR ONE, FRAMES AND RUSTED BOLTS. HOW CAN ONE REPLACE PARTS AND THE OTHER NOT. *TR

NHTSA ODI #10609638

57,000 miles · Dec 17, 2012
Engine

PERSONAL RESEARCH WAS DONE ON THE INTERNET TO FIND HOW THIS HAPPENED ON OTHER NISSANS, THE VERSA, THE ALTIMA, AND NOW THE CUBE. UNFORTUNATELY, THIS CAN CAUSE A WRECK BECAUSE THE PARTS CAN FALL ONTO THE ROAD FROM A SPEEDING CAR, AND HIT ANOTHER CAR ON THE HIGHWAY. THE ISSUE IS WITH THE WELD, AND THE BEAD OF THE FACTORY MUFFLER…

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PERSONAL RESEARCH WAS DONE ON THE INTERNET TO FIND HOW THIS HAPPENED ON OTHER NISSANS, THE VERSA, THE ALTIMA, AND NOW THE CUBE. UNFORTUNATELY, THIS CAN CAUSE A WRECK BECAUSE THE PARTS CAN FALL ONTO THE ROAD FROM A SPEEDING CAR, AND HIT ANOTHER CAR ON THE HIGHWAY. THE ISSUE IS WITH THE WELD, AND THE BEAD OF THE FACTORY MUFFLER BEING CONNECTED TO THE EXHAUST PIPE BY A FLANGE IT IS WELDED TO. THE FLANGE BECOMES UNWELDED TO THE PIPE BY EITHER RUST PERFORATION THROUGH SALT ON THE ROAD IN SNOW AREAS, BY A CHEAP WELD, OR INSUFFICIENT BRACING OF THE EXHAUST SYSTEM COMPONENTS. IT HAS BEEN READ THAT NISSAN CANADA FIXES THESE FREE BASED ON A GOOD WILL EFFORT TO KEEP CUSTOMERS. HOWEVER, IT IS UNSEEN AND UNKNOWN IF THIS PROBLEM WILL BE ADDRESSED BY ANY RECALL IN THE USA. A SIMPLE FIX COULD BE APPLIED IF IT IS DUE TO RUST PERFORATION, PUT A SEAL OVER THE FLANGE TO KEEP SALT OUT. OR MAKE IT A ONE PIPE SYSTEM. OR BRACE IT MORE SUFFICIENTLY SO THAT IT DOESN'T FALL APART SO EASILY AS THE PRESSURE AND WEIGHT OF THE EXHAUST PIPE SYSTEM IS SUPPORTED. THEREFORE, THIS SEEMS LIKE IT SHOULD BE ADDRESSED AND OWNERS SHOULD BE NOTIFIED SO THAT THE DRIVER DOESN'T CAUSE AN UNNECESSARY WRECK IN THE SNOW, OR OTHER NORMAL OPERATION AS THE PIPE COULD FALL OFF. IN SUMMARY, THE WELD OF THE MUFFLER TO THE EXHAUST PIPE FLANGE BREAKS APART TOO EASILY AS PREVIOUSLY KNOWN IN VERSA AND NOW THE CUBE. *TR

NHTSA ODI #10488945

Official recalls

3

26V230000 · Air Bags:frontal:driver Side:inflator Module

Apr 9, 2026

Nissan North America, Inc. (Nissan) is recalling certain 2009-2010 Cube vehicles. The driver’s air bag inflator may rupture or detach from the steering wheel during air bag deployment.

Consequence & remedy

Consequence: A driver's air bag that ruptures or detaches can strike the driver or other occupants, increasing the risk of injury during a crash.

Remedy: Dealers will inspect the front air bag inflator serial number, and replace the inflator as necessary, free of charge. Owner notification letters were mailed June 9, 2026. Owners may contact Nissan's customer service at 800-647-7261. Nissan's number for this recall is R26A1. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning April 14, 2026.

10V330000 · Fuel System, Gasoline:storage

Jul 22, 2010

NISSAN IS RECALLING MODEL YEAR 2009-2010 NISSAN CUBE VEHICLES MANUFACTURED FROM JANUARY 30, 2009 THROUGH JULY 30, 2010. THESE VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 301, "FUEL SYSTEM INTEGRITY." WHEN THE VEHICLE WAS ROTATED FOLLOWING A REAR MOVING BARRIER CRASH TEST AS REQUIRED, THE AMOUNT OF FUEL LEAKAGE EXCEEDED THE ALLOWABLE LIMITS.

Consequence & remedy

Consequence: FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, COULD RESULT IN A FIRE.

Remedy: DEALERS WILL DEVELOP A SPECIAL PROTECTOR AND ATTACH IT TO THE GASOLINE RECIRCULATION TUBE AT THE LOCATION OF THE FILLER NECK CONNECTOR. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 13, 2010. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261.

09V393000 · Tires:pressure Monitoring And Regulating Systems

Oct 5, 2009

NISSAN IS RECALLING CERTAIN MODEL YEAR 2008-2010 VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, DELAWARE, IOWA, ILLINOIS, INDIANA, MASSACHUSETTS, MAINE, MARYLAND, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WASHINGTON D.C., WEST VIRGINIA AND WISCONSIN. THE MATERIAL IN THE NUT USED TO SECURE THE SENSOR-TRANSMITTER OF THE TIRE PRESSURE MONITORING SYSTEM (TPMS) MAY CORRODE AND POTENTIALLY CRACK IN AREAS WITH HEAVY CONCENTRATIONS OF ROAD SALT. IF THIS OCCURS, THE NUT MAY COME OUT OF THE SENSOR-TRANSMITTER AND THE TPMS LAMP WILL ILLUMINATE.

Consequence & remedy

Consequence: IF THE TPMS LAMP IS DISREGARDED AND THE VEHICLE CONTINUES TO BE DRIVEN IN THIS CONDITION, THE TIRE WILL QUICKLY LOSE AIR PRESSURE AT A CONSISTENT RATE RESULTING IN A FLAT TIRE INCREASING THE RISK OF A CRASH.

Remedy: THE DEALER WILL REPLACE THE TPMS NUT WITH A NEW, MORE ROBUST NUT. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN ON OR BEFORE NOVEMBER 9, 2009. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261 AND INFINITI AT 1-800-662-6200.

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

PE25005 · Driver Airbag Inflator Rupture

Opened Jun 13, 2025 · Closed Sep 3, 2026

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

The Office of Defects Investigation (ODI) opened Preliminary Evaluation PE25005 on June 13, 2025, to assess the scope, root cause, and potential defect in 2009 Model Year (MY) Nissan Cube vehicles equipped with Takata PSDI-X air bag inflators.At the time the investigation was opened, analysis by Nissan and Takata (now New Leaf LLC) indicated that a rupture occurred at a weld point between the inflator cap and housing in a 2009 MY Nissan Cube.Nissan ruled out the propellant degradation root cause characteristic of the larger, well known, Takata recall, and instead identified a welding root cause. On April 9, 2026, Nissan North America, Inc. submitted a Part 573 Safety Recall Report to address the weld defect.Recall 26V230 includes the 28,388 2009 MY vehicles identified in the opening resume for this investigation and expands the population to include 2010 MY Nissan Cube vehicles for a total population of 47,928 vehicles produced between October 10, 2008, and September 25, 2010.Nissan identified the driver’s front air bag inflator (Takata PSDI-X, Part Number 98560-7991C) produced by TK Services Inc. within a specific lot may contain an improper body weld seal to the inflator base. This improper weld can cause the air bag module to detach from the steering wheel during deployment, increasing the risk of injury to the occupant in the event of a crash. Dealers will inspect the serial number on the driver’s air bag inflator in recalled vehicles to identify the air bag inflator lot. If the inflator is part of the affected lot, the dealer will remove and replace it with a new inflator manufactured by a different supplier. This repair will be performed free of charge. See NHTSA Recall No. 26V230 for further details. Based on Nissan's recall action, this Preliminary Evaluation is closed.

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.