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2015 Subaru Outback

Owner reports · Recalls · Investigations

More warning signs than most Outback years

Owner complaints for the 2015 Subaru Outback are substantially higher than the model-year median of 207.5.

About this comparison →

When problems were reported

Mileage at the reported incident

343 reports with mileage · 167 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.

  • Visibility/wiper. Review the 130 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 127 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 47 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

20 crash reports5 fire reports13 injury reports

Visibility complaints

14 reports
Clear category filter
71,000 miles · Apr 10, 2024
Visibility

The contact owns a 2015 Subaru Outback. The contact stated while driving at approximately 55 MPH, the front windshield suddenly developed a crack which quickly extended approximately 8 inches horizontally and later extended more than 35 inches across the windshield. The contact stated that the crack began on the passenger’s side…

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The contact owns a 2015 Subaru Outback. The contact stated while driving at approximately 55 MPH, the front windshield suddenly developed a crack which quickly extended approximately 8 inches horizontally and later extended more than 35 inches across the windshield. The contact stated that the crack began on the passenger’s side and extended to the driver’s side of the windshield. The contact stated that the failure had occurred approximately 15 minutes after having the original windshield replaced after the same failure. The cause of the failure was not yet determined. The local service center and manufacturer were notified of the failure. The failure mileage was 71,000.

NHTSA ODI #11582157

Mileage unknown · Jul 18, 2023
Visibility

The contact owns a 2015 Subaru Outback. The contact stated that while driving 50 MPH, the sunroof glass exploded. There was no impact to the sunroof that could have caused the sunroof glass to explode. The shards of glass from the sunroof fell onto the contact, his wife, and his son; however, no injuries were sustained, and medi…

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The contact owns a 2015 Subaru Outback. The contact stated that while driving 50 MPH, the sunroof glass exploded. There was no impact to the sunroof that could have caused the sunroof glass to explode. The shards of glass from the sunroof fell onto the contact, his wife, and his son; however, no injuries were sustained, and medical attention was not received. The vehicle was taken to an independent mechanic, who replaced the sunroof glass. The manufacturer was not made aware of the failure. The failure mileage was unknown.

NHTSA ODI #11533057

95,000 miles · Apr 7, 2023
Visibility

The contact owns a 2015 Subaru Outback. The contact stated while driving 60 MPH and activating the windshield washer on intermittent mode, he noticed that the windshield was significantly dry as the washer mechanism was not supplying fluid to the windshield at the nozzle. The contact stated that as the failure impaired his visib…

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The contact owns a 2015 Subaru Outback. The contact stated while driving 60 MPH and activating the windshield washer on intermittent mode, he noticed that the windshield was significantly dry as the washer mechanism was not supplying fluid to the windshield at the nozzle. The contact stated that as the failure impaired his visibility of the road, he veered to the side of the road. Upon investigating the failure, the contact discovered a puddle of fluid underneath the driver’s side fender of the vehicle and concluded there was a leak of windshield washer fluid through the windshield washer tubing. The contact manually cleaned the windshield and drove to his residence, where he noticed that the windshield washer tubing was fractured about 6 inches from the point at which it entered the cowl housing located at the base of the windshield. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 95,000.

NHTSA ODI #11516031

69,460 miles · May 26, 2022
Visibility

The contact owns a 2015 Subaru Outback. The contact stated that she noticed that there was a crack on the passenger's side windshield after a small rock struck the windshield. The contact stated that the windshield shouldn't have cracked from such a small rock impacting the windshield. The vehicle was not diagnosed nor repaired.…

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The contact owns a 2015 Subaru Outback. The contact stated that she noticed that there was a crack on the passenger's side windshield after a small rock struck the windshield. The contact stated that the windshield shouldn't have cracked from such a small rock impacting the windshield. The vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was 69,460.

NHTSA ODI #11466233

65,000 miles · Mar 22, 2022
Visibility

The contact owns a 2015 Subaru Outback. The contact stated while driving at 70 MPH, a small rock might have struck the windshield causing a crack on the driver's side of the windshield. The contact was able to continue to drive the vehicle though the crack was affecting his vision of the roadway. The contact became aware that an…

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The contact owns a 2015 Subaru Outback. The contact stated while driving at 70 MPH, a small rock might have struck the windshield causing a crack on the driver's side of the windshield. The contact was able to continue to drive the vehicle though the crack was affecting his vision of the roadway. The contact became aware that an unknown manufacturer recall was associated with the failure. The vehicle was taken to the dealer and the manufacturer partially covered the windshield replacement; however, the failure reoccurred while driving. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 65,000.

NHTSA ODI #11457844

130,000 miles · Jan 5, 2022
Visibility

The contact owns a 2015 Subaru Outback. The contact stated that the front windshield cracked without impact. The vehicle was not taken to be inspected. The manufacturer was not informed of the failure. The failure mileage was approximately 130,000.

NHTSA ODI #11446406

60,000 miles · Jan 27, 2021
Visibility

TL* THE CONTACTS OWNS A 2015 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE DRIVING AT AN UNDISCLOSED SPEED, THE CONTACT WAS UNSURE IF AN OBJECT MAY HAVE IMPACTED THE WINDSHIELD CAUSING A CRACK. THE CONTACT WAS UNABLE TO CONFIRM THAT THE WINDSHIELD WAS IMPACTED BY ANY OBJECTS. THE CRACK STARTED OFF AS A LITTLE LINE HOWEVER, WITHI…

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TL* THE CONTACTS OWNS A 2015 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE DRIVING AT AN UNDISCLOSED SPEED, THE CONTACT WAS UNSURE IF AN OBJECT MAY HAVE IMPACTED THE WINDSHIELD CAUSING A CRACK. THE CONTACT WAS UNABLE TO CONFIRM THAT THE WINDSHIELD WAS IMPACTED BY ANY OBJECTS. THE CRACK STARTED OFF AS A LITTLE LINE HOWEVER, WITHIN MINUTES, THE SMALL LINE WENT HORIZONTAL ACROSS THE WINDSHIELD FROM THE PASSENGER'S TO THE DRIVER'S SIDE. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. DON MILLER SUBARU WEST (5822 ODANA RD, MADISON, WI 53719, (608) 442-3200) WAS CONTACTED AND INFORMED THE CONTACT THAT THE VIN WAS NOT UNDER RECALL. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 60,000.

NHTSA ODI #11390208

75,000 miles · Dec 19, 2018
Visibility

TL* THE CONTACT OWNS A 2015 SUBARU OUTBACK. WHEN THE CONTACT ENTERED THE VEHICLE, THE WINDSHIELD CRACKED WITHOUT IMPACT. THE VEHICLE WAS TAKEN TO RELIABLE SUBARU (438 INGRAM MILL RD, SPRINGFIELD, MO 65802, 855-983-7578) WHO STATED THAT A PHOTO WOULD BE PROVIDED TO THE MANUFACTURER TO MAKE A DETERMINATION. THE VEHICLE WAS NOT DI…

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TL* THE CONTACT OWNS A 2015 SUBARU OUTBACK. WHEN THE CONTACT ENTERED THE VEHICLE, THE WINDSHIELD CRACKED WITHOUT IMPACT. THE VEHICLE WAS TAKEN TO RELIABLE SUBARU (438 INGRAM MILL RD, SPRINGFIELD, MO 65802, 855-983-7578) WHO STATED THAT A PHOTO WOULD BE PROVIDED TO THE MANUFACTURER TO MAKE A DETERMINATION. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBER: TL1-38506103544. THE FAILURE MILEAGE WAS 75,000.

NHTSA ODI #11162562

18,000 miles · Jun 16, 2017
Visibility

TL* THE CONTACT OWNS A 2015 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE THEIR WIFE WAS DRIVING AT APPROXIMATELY 25 MPH, THE VEHICLE'S GLASS FOR THE SUNROOF SUDDENLY SHATTERED. THE CONTACT STATED THEY HAD TO ORDER A NEW SUNROOF FROM TEXAS AUTO TOPS THEN SET AN APPOINTMENT TO HAVE THE SUNROOF REPLACED. THE VEHICLE HAD NOT BEEN R…

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TL* THE CONTACT OWNS A 2015 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE THEIR WIFE WAS DRIVING AT APPROXIMATELY 25 MPH, THE VEHICLE'S GLASS FOR THE SUNROOF SUDDENLY SHATTERED. THE CONTACT STATED THEY HAD TO ORDER A NEW SUNROOF FROM TEXAS AUTO TOPS THEN SET AN APPOINTMENT TO HAVE THE SUNROOF REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 18,000.

NHTSA ODI #10995473

16,000 miles · Nov 4, 2016
Visibility

DRIVING DOWN THE STREET ,HEARD A LOUD POP AND THE WINDSHELD CRACKED. L SHAPED CRACK ABOUT 6 IN IN EACH DIRECTION. ABOUT THE SAME WAY THAT HAPPENED TO THE OTHER 122 PEOPLE THAT FILED COMPLAINTS FOR OUTBACK WINDSHIELDS CRACKING.

NHTSA ODI #10924304

Official recalls

5

16V292000 · Steering:column

May 11, 2016

Subaru of America, Inc. (Subaru) is recalling certain model year 2016-2017 Legacy and Outback vehicles manufactured February 29, 2016, to May 6, 2016. The steering column on the affected vehicles may have been improperly machined, and as a result, turning the steering wheel may have no effect on the direction of the wheels.

Consequence & remedy

Consequence: The loss of steering ability would increase the risk of a crash.

Remedy: Subaru will notify owners, and dealers will inspect the lot number on the steering column, replacing the steering column, as necessary, free of charge. The recall began May 13, 2016. Owners may contact Subaru customer service at 1-800-782-2783 or by visiting http://www.wtd65.service-campaign.com. Subaru's number for this recall is WTD-65. Note: Until the vehicles have been inspected, owners are advised not to drive their vehicles.

16V251000 · Electronic Stability Control (esc)

Apr 27, 2016

Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy and Outback vehicles manufactured on July 20, 2015. The brake fluid used in these vehicles may contain excess moisture which may adversely affect the performance of the electronic stability control system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control Systems."

Consequence & remedy

Consequence: Poor performance of the electronic stability control system when it is activated may result in a loss of vehicle control, increasing the risk of a crash.

Remedy: Subaru will notify owners, and dealers will perform an ABS activation, then flush and replace the brake fluid, free of charge. The recall began on May 20, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTC-64.

15V502000 · Power Train:automatic Transmission; Power Train:driveline:driveshaft

Aug 10, 2015

Subaru of America, Inc. (Subaru) is recalling certain 2015 and 2016 model year Subaru Legacy 4-Door and Outback vehicles manufactured July 3, 2015, to July 27, 2015. Transmission oil may leak from a deformed seal cap on the propeller shaft yoke.

Consequence & remedy

Consequence: If the transmission oil leaks onto the exhaust pipe, there is a possible risk of fire.

Remedy: Subaru will notify owners, and dealers will replace the propeller shaft, free of charge. The recall began on August 28, 2015. Owners may contact 1-800-782-2783. Subaru's number for this recall is WQU-56.

Additional source detail variants (2)

Power Train:driveline:driveshaft

Subaru of America, Inc. (Subaru) is recalling certain 2015 and 2016 model year Subaru Legacy 4-Door and Outback vehicles manufactured July 3, 2015, to July 27, 2015. Transmission oil may leak from a deformed seal cap on the propeller shaft yoke.

Consequence: If the transmission oil leaks onto the exhaust pipe, there is a possible risk of fire.

Remedy: Subaru will notify owners, and dealers will replace the propeller shaft, free of charge. The recall began on August 28, 2015. Owners may contact 1-800-782-2783. Subaru's number for this recall is WQU-56.

Power Train:automatic Transmission

Subaru of America, Inc. (Subaru) is recalling certain 2015 and 2016 model year Subaru Legacy 4-Door and Outback vehicles manufactured July 3, 2015, to July 27, 2015. Transmission oil may leak from a deformed seal cap on the propeller shaft yoke.

Consequence: If the transmission oil leaks onto the exhaust pipe, there is a possible risk of fire.

Remedy: Subaru will notify owners, and dealers will replace the propeller shaft, free of charge. The recall began on August 28, 2015. Owners may contact 1-800-782-2783. Subaru's number for this recall is WQU-56.

15V366000 · Exterior Lighting:brake Lights:switch; Forward Collision Avoidance: Crash Imminent Braking

Jun 12, 2015

Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy vehicles manufactured March 10, 2014, to April 16, 2015, Outback vehicles manufactured February 24, 2014, to April 16, 2015, Impreza vehicles manufactured September 9, 2014, to April 14, 2015, XV Crosstrek vehicles manufactured October 16, 2014, to April 15, 2015, and 2016 WRX vehicles manufactured March 23, 2015, and equipped with the Eyesight Driver Assist System. If the switch that activates the brake lights fails, the automatic pre-collision braking component of the driver assist system will not function.

Consequence & remedy

Consequence: If the automatic pre-collision braking system does not function as intended, the vehicle will not react to an obstacle in its path, increasing the risk of a crash.

Remedy: Subaru will notify owners, and dealers will reprogram the driver assist system, free of charge. The recall began on July 20, 2015. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQS-54.

Additional source detail variants (2)

Forward Collision Avoidance: Crash Imminent Braking

Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy vehicles manufactured March 10, 2014, to April 16, 2015, Outback vehicles manufactured February 24, 2014, to April 16, 2015, Impreza vehicles manufactured September 9, 2014, to April 14, 2015, XV Crosstrek vehicles manufactured October 16, 2014, to April 15, 2015, and 2016 WRX vehicles manufactured March 23, 2015, and equipped with the Eyesight Driver Assist System. If the switch that activates the brake lights fails, the automatic pre-collision braking component of the driver assist system will not function.

Consequence: If the automatic pre-collision braking system does not function as intended, the vehicle will not react to an obstacle in its path, increasing the risk of a crash.

Remedy: Subaru will notify owners, and dealers will reprogram the driver assist system, free of charge. The recall began on July 20, 2015. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQS-54.

Exterior Lighting:brake Lights:switch

Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy vehicles manufactured March 10, 2014, to April 16, 2015, Outback vehicles manufactured February 24, 2014, to April 16, 2015, Impreza vehicles manufactured September 9, 2014, to April 14, 2015, XV Crosstrek vehicles manufactured October 16, 2014, to April 15, 2015, and 2016 WRX vehicles manufactured March 23, 2015, and equipped with the Eyesight Driver Assist System. If the switch that activates the brake lights fails, the automatic pre-collision braking component of the driver assist system will not function.

Consequence: If the automatic pre-collision braking system does not function as intended, the vehicle will not react to an obstacle in its path, increasing the risk of a crash.

Remedy: Subaru will notify owners, and dealers will reprogram the driver assist system, free of charge. The recall began on July 20, 2015. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQS-54.

14V577000 · Trailer Hitches

Sep 19, 2014

Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Outback vehicles manufactured January 22, 2014, to August 18, 2014, and equipped with a Subaru accessory trailer hitch assembly. During installation, the trailer hitch mounting nuts may have been overtightened, potentially resulting in failure of the trailer hitch mounting studs.

Consequence & remedy

Consequence: The mounting nut(s) may not provide sufficient force to remain attached to the studs or the studs themselves might break. If this were to happen while a trailer is being towed, the driver might not be able to operate the vehicle as desired or the trailer may detach from the vehicle. Either situation could increase the risk of a crash.

Remedy: Subaru will notify owners, and dealers will replace all eight mounting nuts for the trailer hitch assembly, and will inspect all eight mounting studs for damage, free of charge. The recall began on October 7, 2014. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQN-50.

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

1

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.

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