NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
155 reports85,446 miles · Sep 8, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact stated that while driving 30 MPH, the brake pedal became inoperable, and the brake warning light was illuminated. The contact pulled away from oncoming traffic to ensure that the vehicle stopped and avoided a crash. The vehicle was taken to an independent mechanic, where it was di…
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The contact owns a 2016 Lincoln MKX. The contact stated that while driving 30 MPH, the brake pedal became inoperable, and the brake warning light was illuminated. The contact pulled away from oncoming traffic to ensure that the vehicle stopped and avoided a crash. The vehicle was taken to an independent mechanic, where it was diagnosed with a failure of the front caliper and brake hydraulic system, which needed to be replaced. The vehicle was repaired multiple times. The contact later received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part was not yet available. The dealer was contacted and confirmed that the parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure via telephone. The approximate failure mileage was 85,446.
NHTSA ODI #11762870
79,000 miles · Sep 2, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer confirmed that parts were not yet available for the recall repair. The contact…
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The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer confirmed that parts were not yet available for the recall repair. The contact stated that there was increased brake pedal travel while coming to a complete stop. There was no warning light illuminated. The manufacturer was not notified of the failure. The failure mileage was approximately 79,000.
NHTSA ODI #11761576
Mileage unknown · Aug 28, 2026
Service Brakes
Unknown there were no incidents But the recall is almost 1 year old I received the notice September 2025 regarding a possible brake hose defect waiting almost 1 year for a Fix is Rediclous there had been no updates from Ford/Lincoln motor company brake issue should be taken more Seriously
NHTSA ODI #11760452
52,000 miles · Aug 24, 2026
Back Over PreventionService BrakesService Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact stated that while operating the vehicle and depressing the brake pedal, the vehicle failed to immediately stop with the message “Low Brake Fluid” displayed. Brake fluid was later added to the brake reservoir, and the vehicle was driven to the local mechanic, who diagnosed that the…
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The contact owns a 2016 Lincoln MKX. The contact stated that while operating the vehicle and depressing the brake pedal, the vehicle failed to immediately stop with the message “Low Brake Fluid” displayed. Brake fluid was later added to the brake reservoir, and the vehicle was driven to the local mechanic, who diagnosed that the brake hoses were faulty and needed to be replaced. The brake hoses were replaced, and the vehicle was repaired. The contact previously received notification of NHTSA Campaign Number: 20V469000 (SERVICE BRAKES, SERVICE BRAKES, HYDRAULIC). Additionally, the contact stated that the back over prevention camera had intermittently failed. The cause of the failure was not yet determined. The manufacturer and local dealer were not yet contacted. The failure mileage was approximately 52,000.
NHTSA ODI #11759040
Mileage unknown · Aug 14, 2026
Service Brakes
It has been almost a year since this recall came out and there is not a remedy available. the manufacturer has failed to provide a remedy for it since it came out on August 25, 2026
NHTSA ODI #11756997
Mileage unknown · Aug 10, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); 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 awar…
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The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); 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 not made aware of the issue. The contact had not experienced a failure.
NHTSA ODI #11755967
Mileage unknown · Aug 5, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The contact stated that while driving at various speeds and depressing the brake pedal, the vehicle slowly responded, requiring h…
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The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The contact stated that while driving at various speeds and depressing the brake pedal, the vehicle slowly responded, requiring hard braking, causing the stopping distance to become extended. Several warning lights illuminated with the message "Parking Aid" displayed. The dealer was not contacted. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the failure. The failure mileage was unknown.
NHTSA ODI #11754901
109,000 miles · Aug 4, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The ABS warning light was illuminated. The brake pedal was depressed to the floorboard, and the vehicle slowly stopped. The vehicle almost rear-ended …
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The contact owns a 2016 Lincoln MKX. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The ABS warning light was illuminated. The brake pedal was depressed to the floorboard, and the vehicle slowly stopped. The vehicle almost rear-ended another vehicle. The contact stated that while the vehicle was parked, the contact became aware that there was brake fluid on the ground at the rear passenger’s side of the vehicle. The vehicle was towed to the dealer where it was diagnosed with a cracked brake hose. The contact was informed that the brake hose needed to be replaced. The vehicle was not repaired. The contact was informed that parts were unavailable to repair the vehicle. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was unavailable. The manufacturer was not made aware of the failure. The failure mileage was approximately 109,000.
NHTSA ODI #11754664
Mileage unknown · Aug 3, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was unavailable. The vehicle was scheduled for the recall repair. The contact was later informed that parts were unavailable to repair the vehicle. The …
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The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was unavailable. The vehicle was scheduled for the recall repair. The contact was later informed that parts were unavailable to repair the vehicle. The contact stated that the vehicle was unsafe to drive with the open recall repair. The manufacturer was not contacted. The contact had not experienced a failure.
NHTSA ODI #11754502
64,200 miles · Aug 3, 2026
Service Brakes, Hydraulic
The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The contact stated that while coming to a complete stop and depressing the brake pedal, the brake pedal went to the floorboard, r…
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The contact owns a 2016 Lincoln MKX. The contact received notification of NHTSA Campaign Number: 25V544000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The contact stated that while coming to a complete stop and depressing the brake pedal, the brake pedal went to the floorboard, requiring hard braking to stop the vehicle. The contact stated that the failure had occurred several times while driving. The message "Hydraulic Brake Fluid Low" was displayed. The vehicle was taken to the dealer, where it was diagnosed and determined that the rear flexible brake hoses and the corroded rear brake calipers needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the dealer for assistance. The failure mileage was approximately 64,200.
NHTSA ODI #11754378
Official recalls
7Aug 22, 2025
Ford Motor Company (Ford) is recalling certain 2016-2018 Lincoln MKX and 2015-2018 Edge vehicles. The rear brake jounce hose may rupture and leak brake fluid.
Consequence & remedy
Consequence: A brake fluid leak can extend the distance required to stop the vehicle, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the brake jounce hoses and adjust brake jounce hoses with no damage present, free of charge. Interim owner letters notifying owners of the safety risk were mailed September 8, 2025. Additional letters will be sent once the remedy is available, anticipated August 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S87.
Aug 10, 2020
Ford Motor Company (Ford) is recalling certain 2015-2018 Ford Edge and 2016-2018 Lincoln MKX vehicles. The front brake hoses may rupture prematurely.
Consequence & remedy
Consequence: A ruptured front brake hose will cause a brake fluid leak, lengthening the distance needed to stop the vehicle, increasing the risk of a crash.
Remedy: Ford will notify owners, and dealers will replace the front brake hoses with the new hoses that have a revised braid material, free of charge. Owner notification letters were mailed on May 13, 2021. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 20S42.
Additional source detail variants (2)
Service Brakes
Ford Motor Company (Ford) is recalling certain 2015-2018 Ford Edge and 2016-2018 Lincoln MKX vehicles. The front brake hoses may rupture prematurely.
Consequence: A ruptured front brake hose will cause a brake fluid leak, lengthening the distance needed to stop the vehicle, increasing the risk of a crash.
Remedy: Ford will notify owners, and dealers will replace the front brake hoses with the new hoses that have a revised braid material, free of charge. Owner notification letters were mailed on May 13, 2021. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 20S42.
Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings
Ford Motor Company (Ford) is recalling certain 2015-2018 Ford Edge and 2016-2018 Lincoln MKX vehicles. The front brake hoses may rupture prematurely.
Consequence: A ruptured front brake hose will cause a brake fluid leak, lengthening the distance needed to stop the vehicle, increasing the risk of a crash.
Remedy: Ford will notify owners, and dealers will replace the front brake hoses with the new hoses that have a revised braid material, free of charge. Owner notification letters were mailed on May 13, 2021. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 20S42.
Jul 17, 2020
Ford Motor Company, Inc. (Ford) is recalling certain 2016-2018 Lincoln MKX and 2019-2020 Nautilus vehicles equipped with 16-way electric tilt seats. The seat cushion frame edge may contact the wire harness when the seat occupant uses the tilt function of the seat, potentially damaging one or more wires within the harness, which can result in either inadvertent deployment of the air bag or nondeployment of the air bag in the event of a crash.
Consequence & remedy
Consequence: An air bag that deploys inadvertently increases the risk of a crash. An air bag that does not deploy in the event of a crash increases the risk of injury.
Remedy: Ford will notify owners, and dealers will install protective flocking tape onto the exposed edge of the 16-way seat cushion frames, and inspect the wire harness for damage, and repair or replace it as needed, free of charge. This recall began August 12, 2020. Owners may contact Ford/Lincoln customer service at 1-866-436-7332. Ford's number for this recall is 20S37.
Additional source detail variants (3)
Seats:front Assembly:power Adjust
Ford Motor Company, Inc. (Ford) is recalling certain 2016-2018 Lincoln MKX and 2019-2020 Nautilus vehicles equipped with 16-way electric tilt seats. The seat cushion frame edge may contact the wire harness when the seat occupant uses the tilt function of the seat, potentially damaging one or more wires within the harness, which can result in either inadvertent deployment of the air bag or nondeployment of the air bag in the event of a crash.
Consequence: An air bag that deploys inadvertently increases the risk of a crash. An air bag that does not deploy in the event of a crash increases the risk of injury.
Remedy: Ford will notify owners, and dealers will install protective flocking tape onto the exposed edge of the 16-way seat cushion frames, and inspect the wire harness for damage, and repair or replace it as needed, free of charge. This recall began August 12, 2020. Owners may contact Ford/Lincoln customer service at 1-866-436-7332. Ford's number for this recall is 20S37.
Air Bags
Ford Motor Company, Inc. (Ford) is recalling certain 2016-2018 Lincoln MKX and 2019-2020 Nautilus vehicles equipped with 16-way electric tilt seats. The seat cushion frame edge may contact the wire harness when the seat occupant uses the tilt function of the seat, potentially damaging one or more wires within the harness, which can result in either inadvertent deployment of the air bag or nondeployment of the air bag in the event of a crash.
Consequence: An air bag that deploys inadvertently increases the risk of a crash. An air bag that does not deploy in the event of a crash increases the risk of injury.
Remedy: Ford will notify owners, and dealers will install protective flocking tape onto the exposed edge of the 16-way seat cushion frames, and inspect the wire harness for damage, and repair or replace it as needed, free of charge. This recall began August 12, 2020. Owners may contact Ford/Lincoln customer service at 1-866-436-7332. Ford's number for this recall is 20S37.
Electrical System:wiring:interior/under Dash
Ford Motor Company, Inc. (Ford) is recalling certain 2016-2018 Lincoln MKX and 2019-2020 Nautilus vehicles equipped with 16-way electric tilt seats. The seat cushion frame edge may contact the wire harness when the seat occupant uses the tilt function of the seat, potentially damaging one or more wires within the harness, which can result in either inadvertent deployment of the air bag or nondeployment of the air bag in the event of a crash.
Consequence: An air bag that deploys inadvertently increases the risk of a crash. An air bag that does not deploy in the event of a crash increases the risk of injury.
Remedy: Ford will notify owners, and dealers will install protective flocking tape onto the exposed edge of the 16-way seat cushion frames, and inspect the wire harness for damage, and repair or replace it as needed, free of charge. This recall began August 12, 2020. Owners may contact Ford/Lincoln customer service at 1-866-436-7332. Ford's number for this recall is 20S37.
Nov 12, 2019
Ford Motor Company (Ford) is recalling certain 2016-2017 Lincoln MKX vehicles equipped with 3.7L engines. The battery positive cable harness may contact the transmission shifter cable bracket resulting in a short circuit.
Consequence & remedy
Consequence: An electrical short increases the risk of a fire.
Remedy: Ford will notify owners, and dealers will remove the battery harness clips and elbow guide, and install a wire channel shield and protective sleeve to the battery cable harness, free of charge. Interim notices informing owners of the safety risk were mailed on December 2, 2019. Owners will receive a second notice when the remedy becomes available, currently expected to be the end of April 2020. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 19S41.
Aug 29, 2019
Ford Motor Company (Ford) is recalling certain 2013-2016 Ford Fusion and Lincoln MKZ, 2015-2016 Ford Edge, and 2016 Lincoln MKX vehicles originally sold, or currently registered in Connecticut, Delaware, the District of Columbia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, and Wisconsin. Road salt or other contaminants may corrode the electric power steering gear motor attachment bolts.
Consequence & remedy
Consequence: If the bolts corrode, the steering gear motor may detach from the gear housing resulting in a loss of power steering assist, requiring a greater steering effort, especially at lower speeds, and increasing the risk of a crash.
Remedy: Ford will notify owners, and dealers will replace the steering gear motor bolts and apply a wax sealer. If any of the steering gear motor attachment bolts are broken or missing, a new steering gear will be installed in the vehicle. These repairs will be performed free of charge. The recall began October 18, 2019. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 19S26.
Feb 27, 2017
Ford Motor Company (Ford) is recalling certain 2016-2017 Ford Edge and Lincoln MKX vehicles and 2017 Lincoln Continental vehicles. In the event of a crash, the driver's frontal air bag may not fully inflate or the air bag cushion may detach from the air bag module. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."
Consequence & remedy
Consequence: During deployment, if the air bag does not fully inflate or the cushion detaches, there is an increased risk of injury in the event of a crash.
Remedy: Ford will notify owners, and dealers will replace the driver frontal air bag module, free of charge. The recall began June 16, 2017. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 17C02.
May 24, 2016
Ford Motor Company (Ford) is recalling certain model year 2016 Lincoln MKX vehicles manufactured September 24, 2015. An incorrect seat back trim cover was installed on the affected vehicles, blocking the child seat tether anchors in the second row center seating position. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child restraint anchorage systems."
Consequence & remedy
Consequence: An improperly anchored child seat can increase the risk of injury in a crash.
Remedy: Ford will notify owners, and dealers will replace the seat back trim cover and tether cover bezel on the second row, free of charge. The recall began on June 16, 2016. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 16C09.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1EA21002 · Desiccated Air Bag Inflator Rupture
Opened Sep 17, 2021 · No close date supplied
Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Additional source detail variants (2)
Air Bags:frontal:driver Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
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