NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
33 reportsClear category filterMileage unknown · Jan 27, 2026
Electrical SystemEngineStructureFire
On January 29, 2020, while driving my 2016 BMW 5 Series under normal operating conditions, the engine compartment caught fire without warning. Smoke and flames originated from the engine bay while the vehicle was in motion. I was forced to pull over and exit the vehicle immediately. The fire spread rapidly, and the vehicle was d…
Read full complaint
On January 29, 2020, while driving my 2016 BMW 5 Series under normal operating conditions, the engine compartment caught fire without warning. Smoke and flames originated from the engine bay while the vehicle was in motion. I was forced to pull over and exit the vehicle immediately. The fire spread rapidly, and the vehicle was declared a total loss. At the time, both my insurance carrier and BMW representatives inspected the vehicle, but no definitive cause was identified. In January 2026, I received notification that this same vehicle is subject to BMW Safety Recall Campaign No. 24V-608, which states that liquid from the positive crankcase ventilation system can drip onto the water pump electrical connector, potentially causing a short circuit and, in rare cases, an engine fire. This recall describes the same failure event that destroyed my vehicle, which occurred before any recall remedy was available.
NHTSA ODI #11713522
Mileage unknown · Nov 2, 2025
Electrical SystemEngineFireInjury
My coolant line overheated. From the leaking water pump and pcv that exploded all over my engine causing it to overheat and now how has not turned back on. Ive been without a car for months and when I seen the recall and reached out to the dealer expressing my situation they said they would get back to me and have not called or …
Read full complaint
My coolant line overheated. From the leaking water pump and pcv that exploded all over my engine causing it to overheat and now how has not turned back on. Ive been without a car for months and when I seen the recall and reached out to the dealer expressing my situation they said they would get back to me and have not called or emailed or even responded in months.
NHTSA ODI #11697057
Mileage unknown · Aug 27, 2025
Electrical SystemPower TrainVehicle Speed Control
A critical component failure has rendered my 2016 BMW 528xi inoperable and unsafe. The water pump failed, forcing the car into a safety "limp mode," limiting its speed to approximately 40 miles per hour. This issue mirrors NHTSA Recall 24V-608 regarding an electrical connector on the water pump that can short circuit, potentiall…
Read full complaint
A critical component failure has rendered my 2016 BMW 528xi inoperable and unsafe. The water pump failed, forcing the car into a safety "limp mode," limiting its speed to approximately 40 miles per hour. This issue mirrors NHTSA Recall 24V-608 regarding an electrical connector on the water pump that can short circuit, potentially causing a "thermal event or fire." The problem began with dashboard warnings about overheating, despite the coolant reservoir being full. Following these warnings, the vehicle entered "limp mode," posing a significant safety risk in normal traffic. The potential for fire is also a major concern. An independent service center has confirmed the water pump and its electrical connector as the point of failure. The failed component is available for inspection by a NHTSA investigator. I contacted BMW's customer relations line and was informed that no remedy is currently available. I must wait for an official letter before any action can be taken, including reimbursement. The representative did not provide a case number, making it impossible to track my complaint. The vehicle has not been inspected by the manufacturer, law enforcement, or an insurance representative. I am unable to transfer the title because the car cannot pass a safety inspection in its current state. I am in a severe catch-22: I must receive a recall letter for a vehicle that I am unable to finalize ownership of. This failure to assist an owner with a known safety recall has left me stranded with a dangerous, undrivable vehicle.
NHTSA ODI #11683511
Mileage unknown · Aug 16, 2025
Electrical SystemEngineVehicle Speed Control
Coolant pump failure engine failure also caused fire in engine bay. Insurance inspector. Pre shop inspection. No light were on prior to explosion.
NHTSA ODI #11681035
Mileage unknown · Jul 23, 2025
Electrical SystemEngine And Engine Cooling
The contact owns a 2016 BMW 528I. The contact stated that while the vehicle was parked and running, the contact became aware of an abnormal burning odor. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part …
Read full complaint
The contact owns a 2016 BMW 528I. The contact stated that while the vehicle was parked and running, the contact became aware of an abnormal burning odor. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The dealer was contacted and confirmed that parts were not yet available. The manufacturer was not made aware of the failure. The approximate failure mileage was 45,000. VIN tool confirms parts not available.
NHTSA ODI #11675593
Mileage unknown · Jul 21, 2025
Electrical SystemEngine And Engine Cooling
The contact owns a 2016 BMW 528I. The contact stated that while her son was driving at undisclosed speeds, there was an abnormally loud knocking sound coming from the vehicle. The contact stated that there was coolant leaking from the vehicle. The contact was adding coolant to the coolant reservoir every other day. The contact s…
Read full complaint
The contact owns a 2016 BMW 528I. The contact stated that while her son was driving at undisclosed speeds, there was an abnormally loud knocking sound coming from the vehicle. The contact stated that there was coolant leaking from the vehicle. The contact was adding coolant to the coolant reservoir every other day. The contact stated that the vehicle was smoking and there was an abnormal rattling sound coming from the vehicle and the engine was overheating. The vehicle was inoperable. The coolant message was displayed. There were no warning lights illuminated. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was unknown. VIN tool confirms parts not available.
NHTSA ODI #11675103
Mileage unknown · Jul 7, 2025
Electrical SystemEngine And Engine Cooling
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time…
Read full complaint
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA ODI #11671590
Mileage unknown · Jun 25, 2025
Electrical SystemEngine
My vehicle is a 2016 BMW 528i xDrive. There is an active safety recall listed under NHTSA Campaign Number 24V-608, issued in August 2024. The affected component is the engine coolant pump. As of June 2025, no remedy has been made available by BMW, and I have been told by both BMW corporate and my local dealer that they cannot pr…
Read full complaint
My vehicle is a 2016 BMW 528i xDrive. There is an active safety recall listed under NHTSA Campaign Number 24V-608, issued in August 2024. The affected component is the engine coolant pump. As of June 2025, no remedy has been made available by BMW, and I have been told by both BMW corporate and my local dealer that they cannot provide a fix or a timeline. This component is essential to keeping the engine within safe temperature limits. Failure of the coolant pump could lead to overheating and potentially increase the risk of fire, as the recall suggests. This places my safety and that of others on the road at risk every time I drive the vehicle. I rely on this car for regular transportation and feel I have no choice but to drive a vehicle with an unresolved critical safety issue. The vehicle has not yet experienced a failure or warning light specific to the coolant system, and it has not been inspected or repaired due to the lack of remedy. However, I should not be forced to wait indefinitely or risk a dangerous situation developing before action is taken. BMW’s failure to provide a remedy or meaningful updates in nearly a year shows a lack of urgency and accountability. I am submitting this complaint to formally document the issue and ask that NHTSA take action to compel BMW to issue a fix or provide alternatives to affected owners.
NHTSA ODI #11669076
Mileage unknown · Jun 16, 2025
Electrical SystemEngine And Engine Cooling
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufactur…
Read full complaint
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA ODI #11667146
Mileage unknown · Jun 11, 2025
Electrical SystemEngine And Engine Cooling
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The deal…
Read full complaint
The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA ODI #11666277
Official recalls
4Aug 13, 2024
BMW of North America, LLC. (BMW) is recalling certain 2012-2015 X1 sDrive28i, X1 xDrive28i, 2012-2016 Z4 sDrive28i, 528i, 528i xDrive, 328i, 328xi, 2016-2018 X5 xdrive 40e, 2014-2016 228i, 228xi, 428i, 428i xDrive, 328xi Gran Turismo, 2013-2017 X3 sDrive28i, X3 xDrive28i, 2015-2018 X4 xDrive28i, 2015-2016 428xi vehicles. An improperly sealed electrical connector on the water pump may be exposed to water and short circuit.
Consequence & remedy
Consequence: An electrical short increases the risk of a fire.
Remedy: Dealers will inspect and replace the water pump and plug connector as necessary, and install a protective shield, free of charge. Owner notification letters were mailed on March 28, 2025. Owners may contact BMW customer service at 1-800-525-7417.
Additional source detail variants (2)
Electrical System:wiring:connectors/plugs/receptacles
BMW of North America, LLC. (BMW) is recalling certain 2012-2015 X1 sDrive28i, X1 xDrive28i, 2012-2016 Z4 sDrive28i, 528i, 528i xDrive, 328i, 328xi, 2016-2018 X5 xdrive 40e, 2014-2016 228i, 228xi, 428i, 428i xDrive, 328xi Gran Turismo, 2013-2017 X3 sDrive28i, X3 xDrive28i, 2015-2018 X4 xDrive28i, 2015-2016 428xi vehicles. An improperly sealed electrical connector on the water pump may be exposed to water and short circuit.
Consequence: An electrical short increases the risk of a fire.
Remedy: Dealers will inspect and replace the water pump and plug connector as necessary, and install a protective shield, free of charge. Owner notification letters were mailed on March 28, 2025. Owners may contact BMW customer service at 1-800-525-7417.
Engine And Engine Cooling:cooling System:pump
BMW of North America, LLC. (BMW) is recalling certain 2012-2015 X1 sDrive28i, X1 xDrive28i, 2012-2016 Z4 sDrive28i, 528i, 528i xDrive, 328i, 328xi, 2016-2018 X5 xdrive 40e, 2014-2016 228i, 228xi, 428i, 428i xDrive, 328xi Gran Turismo, 2013-2017 X3 sDrive28i, X3 xDrive28i, 2015-2018 X4 xDrive28i, 2015-2016 428xi vehicles. An improperly sealed electrical connector on the water pump may be exposed to water and short circuit.
Consequence: An electrical short increases the risk of a fire.
Remedy: Dealers will inspect and replace the water pump and plug connector as necessary, and install a protective shield, free of charge. Owner notification letters were mailed on March 28, 2025. Owners may contact BMW customer service at 1-800-525-7417.
Dec 20, 2016
BMW of North America, LLC (BMW) is recalling certain model year 2017 BMW 640i, 640i xDrive, 650i, 650i xDrive, M6, 535i, 535i xDrive, 430i, 430i xDrive, 440i, 440i xDrive, M4, X1 sDrive28i, X1 xDrive28i, i3, i8, Rolls-Royce Dawn, Mini Clubman Cooper, Clubman Cooper S, Cooper All4, Cooper S All4, Mini 4-Door Cooper, Cooper S, Mini 2-Door Cooper, Cooper S, John Cooper Works and 2016 BMW 528i, 528i xDrive, 535i, 535i xDrive, 550i, 550i xDrive, M5 and 535d vehicles. The affected vehicles have seat- mounted side air bag inflator initiators that may fail to ignite during a crash.
Consequence & remedy
Consequence: If the air bag inflator initiator fails to ignite, the seat-mounted air bag will not deploy, increasing the risk of injury.
Remedy: BMW will notify owners, and dealers will replace the air bag modules, free of charge. The recall began February 6, 2017. Owners may contact BMW customer service at 1-800-525-7417.
Oct 17, 2016
BMW of North America, LLC (BMW) is recalling certain model year 2016-2017 X1 sDrive28i, X1 xDrive28i, MINI Hardtop 4 Door Cooper, Mini Hardtop 4 Door Cooper S, MINI Cooper Clubman, and Cooper S Clubman, 2017 Rolls-Royce Ghost, and 2016 528i vehicles. The vehicle-sensitive locking mechanism of the seat belt Emergency Locking Retractor (ELR) for the driver's seat may not lock as designed. As such, these vehicles fail to comply with the requirements of the Federal Motor Vehicle Safety Standard (FMVSS) number 209, "Seat Belt Assemblies."
Consequence & remedy
Consequence: In the event of a crash where heavy braking is applied, the Emergency Locking Retractor (ELR) may activate when the occupant is more forward in the seat, possibly increasing the risk of injury.
Remedy: BMW will notify owners, and dealers will replace the driver's seat belt assembly, free of charge. The recall began July 3, 2019. Owners may contact BMW customer service at 1-800-525-7417.
Oct 30, 2015
BMW of North America, LLC (BMW) is recalling certain model year 2016 528i, 528i xDrive, 535i, 535i xDrive, 535d xDrive, M5, 550i, 550i xDrive, and 535d sedans. The affected vehicles have an inboard lower anchor for child restraints on the left rear seat that may have been bent downwards, preventing the child seat from fully engaging both lower anchors. As such, these vehicles may fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
Consequence & remedy
Consequence: If the child seat is not properly attached to the lower anchors, it can increase the child's risk of injury in the event of a crash.
Remedy: BMW will notify owners, and dealers will inspect and, if necessary, repair the inboard lower anchor on the left rear seat, free of charge. The recall began on December 28, 2015. Owners may contact BMW customer service at 1-800-525-7417.
Additional source detail variants (2)
Child Seat
BMW of North America, LLC (BMW) is recalling certain model year 2016 528i, 528i xDrive, 535i, 535i xDrive, 535d xDrive, M5, 550i, 550i xDrive, and 535d sedans. The affected vehicles have an inboard lower anchor for child restraints on the left rear seat that may have been bent downwards, preventing the child seat from fully engaging both lower anchors. As such, these vehicles may fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
Consequence: If the child seat is not properly attached to the lower anchors, it can increase the child's risk of injury in the event of a crash.
Remedy: BMW will notify owners, and dealers will inspect and, if necessary, repair the inboard lower anchor on the left rear seat, free of charge. The recall began on December 28, 2015. Owners may contact BMW customer service at 1-800-525-7417.
Seats:mid/rear Assembly
BMW of North America, LLC (BMW) is recalling certain model year 2016 528i, 528i xDrive, 535i, 535i xDrive, 535d xDrive, M5, 550i, 550i xDrive, and 535d sedans. The affected vehicles have an inboard lower anchor for child restraints on the left rear seat that may have been bent downwards, preventing the child seat from fully engaging both lower anchors. As such, these vehicles may fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
Consequence: If the child seat is not properly attached to the lower anchors, it can increase the child's risk of injury in the event of a crash.
Remedy: BMW will notify owners, and dealers will inspect and, if necessary, repair the inboard lower anchor on the left rear seat, free of charge. The recall began on December 28, 2015. Owners may contact BMW customer service at 1-800-525-7417.
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.