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2017 Subaru Outback

Owner reports · Recalls · Investigations

More warning signs than most Outback years

Owner complaints for the 2017 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

516 reports with mileage · 401 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.

  • Electrical System. Review the 391 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Visibility/wiper. Review the 205 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. 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.

32 crash reports3 fire reports17 injury reports

Engine complaints

43 reports
Clear category filter
76,062 miles · May 10, 2022
Engine

The contact owns a 2017 Subaru Outback. The contact stated that the windshield cracked on the upper driver’s side windshield and extended to the center of the windshield. There was no impact to the windshield to cause the crack. The contact had not informed a dealer of the failure. The windshield had not been replaced. The manuf…

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The contact owns a 2017 Subaru Outback. The contact stated that the windshield cracked on the upper driver’s side windshield and extended to the center of the windshield. There was no impact to the windshield to cause the crack. The contact had not informed a dealer of the failure. The windshield had not been replaced. The manufacturer was not made aware of the failure. The approximate failure mileage was 76,062.

NHTSA ODI #11464000

Mileage unknown · Aug 1, 2021
Electrical SystemEngine

I drove my Outback for 10 minutes. I stopped to run an errand that took 30 minutes. I then tried to start the car and it wouldn't start. All the lights on the dash turned on. I then tried several more times. It still would not start. Then I waited several minutes and it started. I drove it home. I have since tried to start…

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I drove my Outback for 10 minutes. I stopped to run an errand that took 30 minutes. I then tried to start the car and it wouldn't start. All the lights on the dash turned on. I then tried several more times. It still would not start. Then I waited several minutes and it started. I drove it home. I have since tried to start it several times and it has started. The car has slightly less than 20K miles on it. This has never happened before. It was a very hot day - nearly 100 degrees and I was quite panicky that it would not start. I was worried I would be stranded. There was never any indication before that something like this might happen. I am going to call the dealership tomorrow.

NHTSA ODI #11427374

52,000 miles · May 5, 2021
Electrical SystemEngineUnknown Or Other

I BELIEVE ALL OF THE FOLLOWING CIRCUMSTANCES TO BE CAUSED BY AN ELECTRICAL PROBLEM: DEC.31, 2020: CAR HESITATES TO START. IT NEVER TURNS OVER SO IT DOES NOT EVER START. WE INSTALL NEW BATTERY & CAR STARTS. MID-JAN.2021: CAR WON'T START FROM PUSH START, BUT DOES START WHEN I USE MY REMOTE START KEY FOB. AFTER THAT, CAR STAR…

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I BELIEVE ALL OF THE FOLLOWING CIRCUMSTANCES TO BE CAUSED BY AN ELECTRICAL PROBLEM: DEC.31, 2020: CAR HESITATES TO START. IT NEVER TURNS OVER SO IT DOES NOT EVER START. WE INSTALL NEW BATTERY & CAR STARTS. MID-JAN.2021: CAR WON'T START FROM PUSH START, BUT DOES START WHEN I USE MY REMOTE START KEY FOB. AFTER THAT, CAR STARTS WITH PUSH START. FEB.-APRIL 2021: CAR HAS A SEVERAL TIMES WHEN IT HESTITATES TO START, BUT ULTIMATELY IT DOES START. MAY 1-3 2021: CAR HESITATES TO START, BUT ULTIMATELY STARTS. MAY 4-5 2021: CAR NOT ONLY HESITATES TO START, BUT NOW I HAVE ALL KINDS OF LIGHTS LIT UP ON MY DASH, INCLUDING CHECK ENGINE, EYESIGHT, X-MODE LIGHT IS FLASHING, AND SEVERAL OTHERS THAT I CANNOT GET TO TURN OFF. IN ALL INSTANCES, VEHICLE WAS STATIONARY AND TURNED OFF. I HAVE PHOTOS & VIDEO BUT CAN'T SEEM TO REDUCE FILE SIZE TO REQUIRED 5MB. SIDE NOTE: UNLESS I AM AT WORK OR RUNNING ERRANDS, MY CAR IS ALWAYS IN THE GARAGE.

NHTSA ODI #11415232

32,000 miles · May 1, 2021
Electrical SystemEngine

IN 2018 THE BATTERY KEPT DYING AND HAD GO BE REPLACED. NOW, IN 2012, THE SAME THING IS HAPPENING AGAIN. IT HAD TO BE JUMPED OFF YESTERDAY MORNING, AGAIN THIS MORNING AND NOW THIS EVENING IS DEAD AGAIN. THE CAR ONLY HAS A VERY LITTLE OVER 32,000 ACTUAL MILES ON IT. THE VEHICLE IS KEOPT IN THE GARAGE ALL THE TIME AND THIS IS WHERE…

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IN 2018 THE BATTERY KEPT DYING AND HAD GO BE REPLACED. NOW, IN 2012, THE SAME THING IS HAPPENING AGAIN. IT HAD TO BE JUMPED OFF YESTERDAY MORNING, AGAIN THIS MORNING AND NOW THIS EVENING IS DEAD AGAIN. THE CAR ONLY HAS A VERY LITTLE OVER 32,000 ACTUAL MILES ON IT. THE VEHICLE IS KEOPT IN THE GARAGE ALL THE TIME AND THIS IS WHERE IT IS AS IT IS DYING.

NHTSA ODI #11414752

24,000 miles · Apr 20, 2021
Electrical SystemEngine

TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT THE VEHICLE FAILED TO START MULTIPLE TIMES WITHOUT WARNING. THE CONTACT PURCHASED A BATTERY CHARGER TO CHARGE THE BATTERY. THE CONTACT MENTIONED THAT WHILE THE VEHICLE WAS TURNED OFF, THERE WAS AN ABNORMAL SOUND COMING FROM THE VEHICLE. THE VEHICLE WAS NOT DIAGN…

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TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT THE VEHICLE FAILED TO START MULTIPLE TIMES WITHOUT WARNING. THE CONTACT PURCHASED A BATTERY CHARGER TO CHARGE THE BATTERY. THE CONTACT MENTIONED THAT WHILE THE VEHICLE WAS TURNED OFF, THERE WAS AN ABNORMAL SOUND COMING FROM THE VEHICLE. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE FAILURE RECURRED 3 ADDITIONAL TIMES. NEIL HUFFMAN AUTOMOTIVE GROUP (1220 VERSAILLES RD, FRANKFORT, KY 40601, (502) 695-7500) WAS CONTACTED AND INFORMED OF THE FAILURE. THE DEALER RECOMMENDED THAT THE VEHICLE BE TAKEN IN TO BE DIAGNOSED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 24,000.

NHTSA ODI #11413046

36,000 miles · Mar 16, 2021
Engine

BATTERY DRAINS FOR NO APPARENT REASON. LEAVES PEOPLE STRANDED.

NHTSA ODI #11403264

5,000 miles · Feb 27, 2021
Electrical SystemEngine

REPEATED PROBLEM OF BATTERY DRAINING, USUALLY WHEN HATCHBACK IS OPENED FOR APPROX. 20 MINUTES, LOADING OR UNLOADING CAMPING GEAR. THIS HAS HAPPENED ALMOST HALF DOZEN TIMES, AND IT IS BOTH FRUSTRATING AND POTENTIALLY DANGEROUS, AS I GENERALLY CAMP BY MYSELF. NOW I HAVE TO LEAVE THE ENGINE RUNNING WHEN I PUT IN OR TAKE ANYTHING OU…

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REPEATED PROBLEM OF BATTERY DRAINING, USUALLY WHEN HATCHBACK IS OPENED FOR APPROX. 20 MINUTES, LOADING OR UNLOADING CAMPING GEAR. THIS HAS HAPPENED ALMOST HALF DOZEN TIMES, AND IT IS BOTH FRUSTRATING AND POTENTIALLY DANGEROUS, AS I GENERALLY CAMP BY MYSELF. NOW I HAVE TO LEAVE THE ENGINE RUNNING WHEN I PUT IN OR TAKE ANYTHING OUT OF THE HATCHBACK MORE THAN GROCERIES.

NHTSA ODI #11398199

Mileage unknown · Dec 29, 2020
Electrical SystemEngine

TL* THE CONTRACT CALLED ON BEHALF OF HIS FATHER WHO OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT THE BATTERY WAS REPLACED ON SEVERAL OCCASIONS. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO MILLER HILL SUBARU (4710 MILLER TRUNK HWY, DULUTH, MN 55811) WHERE THE FAILURE WAS DIAGNOSED AS A FAULTY BATTERY, REMOTE STARTER, …

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TL* THE CONTRACT CALLED ON BEHALF OF HIS FATHER WHO OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT THE BATTERY WAS REPLACED ON SEVERAL OCCASIONS. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO MILLER HILL SUBARU (4710 MILLER TRUNK HWY, DULUTH, MN 55811) WHERE THE FAILURE WAS DIAGNOSED AS A FAULTY BATTERY, REMOTE STARTER, SENSOR AND REAR LIFTGATE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND A CASE WAS FILED. THE FAILURE MILEAGE WAS UNKNOWN.

NHTSA ODI #11385441

48,000 miles · Oct 17, 2020
EngineService BrakesCrash

PULLING INTO OUR GARAGE (AS WE HAVE DONE PROBABLY THOUSANDS OF TIMES SINCE OWNING THE CAR), OUR 2017 OUTBACK ACCELERATED OUT OF CONTROL INTO THE BACK WALL OF OUR GARAGE. CAR HAD BEEN STOPPED AT THE PARKING POSITION IN THE GARAGE AND WAS BEING SHIFTED INTO PARK WHEN THE ACCELERATION OCCURRED. GAS PEDAL WAS NOT TOUCHED (CAR ALWAYS…

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PULLING INTO OUR GARAGE (AS WE HAVE DONE PROBABLY THOUSANDS OF TIMES SINCE OWNING THE CAR), OUR 2017 OUTBACK ACCELERATED OUT OF CONTROL INTO THE BACK WALL OF OUR GARAGE. CAR HAD BEEN STOPPED AT THE PARKING POSITION IN THE GARAGE AND WAS BEING SHIFTED INTO PARK WHEN THE ACCELERATION OCCURRED. GAS PEDAL WAS NOT TOUCHED (CAR ALWAYS COASTS INTO GARAGE UNDER IT'S OWN POWER, AND FOOT IS ONLY ON THE BRAKE ALWAYS). EXTENSIVE DAMAGE TO CAR AND GARAGE. BOTH SUBARU AND OUR INSURANCE COMPANY HAVE BEEN ALERTED.

NHTSA ODI #11364833

28,500 miles · Aug 16, 2020
Electrical SystemEngine

BATTERY DRAINED

NHTSA ODI #11349694

Official recalls

4

19V910000 · Air Bags: Air Bag/restraint Control Module

Dec 19, 2019

Subaru of America, Inc. (Subaru) is recalling certain 2016-2017 Outback vehicles. A replacement air bag control module may have been installed that is not compatible with the passenger air bag module, possibly affecting air bag deployment.

Consequence & remedy

Consequence: In the event of a crash necessitating passenger frontal air bag deployment, the air bag may not deploy properly, increasing the risk of injury.

Remedy: Subaru will notify owners, and dealers will replace the passenger air bag module, free of charge. The recall began February 3, 2020. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUX-09.

16V716000 · Air Bags:knee Bolster; Steering:column

Oct 6, 2016

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.

Consequence & remedy

Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.

Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.

Additional source detail variants (2)

Air Bags:knee Bolster

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.

Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.

Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.

Steering:column

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.

Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.

Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.

16V576000 · Service Brakes, Hydraulic:foundation Components:disc:caliper; Suspension

Aug 3, 2016

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.

Consequence & remedy

Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.

Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.

Additional source detail variants (2)

Service Brakes, Hydraulic:foundation Components:disc:caliper

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.

Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.

Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.

Suspension

Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.

Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.

Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.

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.

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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