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2016 Dodge Charger

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

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When problems were reported

Mileage at the reported incident

107 reports with mileage · 75 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.

  • Structure. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

7 crash reports2 fire reports8 injury reports

Electrical System complaints

25 reports
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97,000 miles · Sep 30, 2025
Electrical SystemEngineFuel System, Gasoline

The contact owns a 2016 Dodge Charger. The contact purchased the vehicle, and the vehicle was taken for the Emissions Test; however, the vehicle failed the Emissions Test. The contact notified the dealer and was informed that some unknown sensors had been replaced, and to allow for a week for the vehicle to adjust. The vehicle w…

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The contact owns a 2016 Dodge Charger. The contact purchased the vehicle, and the vehicle was taken for the Emissions Test; however, the vehicle failed the Emissions Test. The contact notified the dealer and was informed that some unknown sensors had been replaced, and to allow for a week for the vehicle to adjust. The vehicle was taken to the dealer, and the vehicle failed to start. The vehicle was not diagnosed. The contact stopped by the dealer to pick up the vehicle. The vehicle was restarted, and the contact drove the vehicle to the residence. The contact stated that in the evening, the vehicle failed to restart. After several attempts, the vehicle restarted. The contact stated that on a separate occasion, while driving 40 MPH, there was white smoke coming from the rear of the vehicle. The contact stated that there was a plastic burning odor and an abnormal fuel odor entering the vehicle through the A/C vents. There was no warning light illuminated. The vehicle was taken to the dealer. The contact requested that the vehicle have a full inspection, and the dealer refused. The contact was informed that the spark plugs and fuel pump needed to be replaced. The vehicle remained at the dealer unrepaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 97,000.

NHTSA ODI #11690668

120,000 miles · Sep 24, 2025
Electrical System

Odometer Faud. The contact purchased a 2016 Dodge Charger. The contact stated that while attempting to have the vehicle diagnosed, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was approximately 116,000 and at the time of diagnosis, it was disc…

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Odometer Faud. The contact purchased a 2016 Dodge Charger. The contact stated that while attempting to have the vehicle diagnosed, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was approximately 116,000 and at the time of diagnosis, it was discovered that the mileage was approximately 120,000.

NHTSA ODI #11689555

Mileage unknown · Jan 28, 2025
Electrical SystemSteering

There’s multiple issues I’ve had with this car since day one. One of them almost causing a crash on the interstate going 70mph. The car shut down though the lights remained on and the message service ESC electronic stability control came on, service AWD system, service electric power steering, service brake system and at the tim…

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There’s multiple issues I’ve had with this car since day one. One of them almost causing a crash on the interstate going 70mph. The car shut down though the lights remained on and the message service ESC electronic stability control came on, service AWD system, service electric power steering, service brake system and at the time I just left a certified dodge dealership where they did a “” flash recall on the engines computer. Me and my infant child were stranded for over 5 hours until the car decided it would start back. This power loss caused the power steering to lock up and no movement besides me coasting to get over into the emergency lane on the interstate almost being hit by multiple vehicles. The Service ESC came on numerous times since then and still keeps coming on and dodge says it’s nothing and clears the codes. The drive shaft bolts backed out and caused my drive shaft to snap in half costing me over $1700.00. The sec system never works properly it stays stuck in awd mode and seldomly goes in RWD mode. When turning traction control off it automatically kicks into awd not sure if that’s suppose to happen but makes no sense if so. Also the turn signal switch on the steering column is faulty causing the wipers to come on any time you use the turn signal or turn the wheel to make a turn in the vehicle. That has caused me to almost wreck more times then I can count. This car and this cars year make and model definitely has a lot of safety issues and should be investigated by the manufacturer. On the date below I checked February 22, 2022 due to this issue being persistent I can look for the old invoices where I had to replace my drive shaft if needed just email me

NHTSA ODI #11639040

Mileage unknown · Dec 4, 2024
Electrical SystemFuel/propulsion System

The car has had over 5 batteries in the last year and 3 in the last 2 months. Something is constantly draining the battery in my car and making them go very bad. Also the car will be dead if I park it too long because of the electrical issue and it’s been a huge problem for me.

NHTSA ODI #11628796

Mileage unknown · Jan 27, 2024
Electrical SystemEngine

Engine problems after problems on all charger no warning sign or nothing and electric issues on whole vehicle work temporarily

NHTSA ODI #11568232

Mileage unknown · Aug 27, 2023
Electrical SystemExterior LightingVisibility/wiper

Headlamps are not working therefore causing a safety issue when driving at night. Initially, 2 years ago, April 2021 the driver headlamp was not working. Dodge dealership had replaced and within the year the bulb would come off and on intermittently. It cost over $400.00. On March 18, 2022 I took it back to Dodge dealershi…

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Headlamps are not working therefore causing a safety issue when driving at night. Initially, 2 years ago, April 2021 the driver headlamp was not working. Dodge dealership had replaced and within the year the bulb would come off and on intermittently. It cost over $400.00. On March 18, 2022 I took it back to Dodge dealership and because it was working that day they just said to bring it when it was not working? They had the car for the whole day and did not inspect anything. Now a year later both of my headlamps are not working and took it back to them again. Now my fuses are melted and have been told by them that the cars electrical system is faulty. The car will need a new PDC Power Distribution Center unit that controls the electrical power which is no longer made. He found a dealer that has the unit available but also includes the wires harness . The charge for this including labor is 5300 if he the dealer will sell it to him. He did not advise of price for part and labor separately. The dealer charged me 212.00 to tell me this. Meanwhile I have a car that is only 7 years old that I cannot drive safely at night and it will not pass motor vehicle inspection which is in 2 weeks. Therefore, now I own a car I cannot legally have on the road because of this issue with the headlamps.

NHTSA ODI #11540982

Mileage unknown · May 10, 2023
Electrical SystemExterior Lighting

The headlight bulbs, like a past recall on the 2011-2012 Chargers, regularly fry through fuses and stop working. This is obviously caused by a more serious issue in the vehicle and should be recalled. Many Dodge Charger and Challenger owners have been faced with this common problem, as shown in the comments on the page linked…

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The headlight bulbs, like a past recall on the 2011-2012 Chargers, regularly fry through fuses and stop working. This is obviously caused by a more serious issue in the vehicle and should be recalled. Many Dodge Charger and Challenger owners have been faced with this common problem, as shown in the comments on the page linked below: https://www.youtube.com/watch?v=pAmcGxeD5LY In my case, I've had several electrical issues with the headlight, and have had the entire headlight unit replaced. We have also switched the bulbs to see if that changes anything. After still having problems with the light going out, the repair shop I took it to informed me that the fuse can be switched for a quick fix, although it is not fixing the root of the problem, and this is a very common issue among these types of cars.

NHTSA ODI #11521392

Mileage unknown · Jan 28, 2023
Electrical SystemSteering

The power steering goes in and out completely loosing power steering while Maneuvering A curve in the road it completely stops or if it's already out it will come back on while steering so your giving a lot of force then suddenly you have power steraing again you harshly turn to almost swerve off the road or towards traffic.

NHTSA ODI #11504231

Mileage unknown · Apr 19, 2022
Electrical System

Car wouldnt start made a clicking sound on April 30. Started and drove home from store. On March 31 the car died on me in traffic with no warning. Towed to mechanic and it has been there since March 31, 2020. Still in shop for repairs of the Tipm

NHTSA ODI #11461278

Mileage unknown · Dec 14, 2021
Electrical SystemEngineUnknown Or Other

The car randomly dies. I will come to a stop sign or stop light and it will shut off without warning. Usually I put the car in park and it starts back up without issues. Last time it happened when I started it back up it was stuck in 3rd gear. I've had it towed to Landmark dodge before and they said cam shaft sensor so they repl…

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The car randomly dies. I will come to a stop sign or stop light and it will shut off without warning. Usually I put the car in park and it starts back up without issues. Last time it happened when I started it back up it was stuck in 3rd gear. I've had it towed to Landmark dodge before and they said cam shaft sensor so they replaced it. Then it happened again and they agreed it was the battery. Replaced the battery. Does it again (this last time when it wouldn't come out of 3rd gear. Check engine light now on and no traction control) tow to Landmark they keep it for 3 days and they said it was acting normal and they see nothing wrong. Waiting for it to happen AGAIN. Every time Landmark tells me my car is fine.

NHTSA ODI #11443834

Official recalls

5

18V332000 · Electrical System:software; Electrical System:wiring; Vehicle Speed Control:cruise Control

May 17, 2018

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler 200, 2016-2018 RAM 3500 Cab Chassis (less than 10,000 lb), 2017-2018 Chrysler Pacifica and 2018 Jeep Wrangler vehicles. These vehicles are being recalled to address a defect that could prevent the cruise control system from disengaging. If, when using cruise control, there is a short circuit within the vehicle's wiring, the driver may not be able to shut off the cruise control either by depressing the brake pedal or manually turning the system off once it has been engaged, resulting in either the vehicle maintaining its current speed or possibly accelerating.

Consequence & remedy

Consequence: If the vehicle maintains its speed or accelerates despite attempts to deactivate the cruise control, there would be an increased risk of a crash.

Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June 4, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Note: Owners are advised to stop using cruise control until the software update has been performed. In the event that cruise control cannot be disengaged while driving, owners should firmly and steadily apply the brakes and shift the transmission to neutral, placing the vehicle in park once it has stopped.

Additional source detail variants (3)

Electrical System:software

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler 200, 2016-2018 RAM 3500 Cab Chassis (less than 10,000 lb), 2017-2018 Chrysler Pacifica and 2018 Jeep Wrangler vehicles. These vehicles are being recalled to address a defect that could prevent the cruise control system from disengaging. If, when using cruise control, there is a short circuit within the vehicle's wiring, the driver may not be able to shut off the cruise control either by depressing the brake pedal or manually turning the system off once it has been engaged, resulting in either the vehicle maintaining its current speed or possibly accelerating.

Consequence: If the vehicle maintains its speed or accelerates despite attempts to deactivate the cruise control, there would be an increased risk of a crash.

Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June 4, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Note: Owners are advised to stop using cruise control until the software update has been performed. In the event that cruise control cannot be disengaged while driving, owners should firmly and steadily apply the brakes and shift the transmission to neutral, placing the vehicle in park once it has stopped.

Vehicle Speed Control:cruise Control

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler 200, 2016-2018 RAM 3500 Cab Chassis (less than 10,000 lb), 2017-2018 Chrysler Pacifica and 2018 Jeep Wrangler vehicles. These vehicles are being recalled to address a defect that could prevent the cruise control system from disengaging. If, when using cruise control, there is a short circuit within the vehicle's wiring, the driver may not be able to shut off the cruise control either by depressing the brake pedal or manually turning the system off once it has been engaged, resulting in either the vehicle maintaining its current speed or possibly accelerating.

Consequence: If the vehicle maintains its speed or accelerates despite attempts to deactivate the cruise control, there would be an increased risk of a crash.

Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June 4, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Note: Owners are advised to stop using cruise control until the software update has been performed. In the event that cruise control cannot be disengaged while driving, owners should firmly and steadily apply the brakes and shift the transmission to neutral, placing the vehicle in park once it has stopped.

Electrical System:wiring

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler 200, 2016-2018 RAM 3500 Cab Chassis (less than 10,000 lb), 2017-2018 Chrysler Pacifica and 2018 Jeep Wrangler vehicles. These vehicles are being recalled to address a defect that could prevent the cruise control system from disengaging. If, when using cruise control, there is a short circuit within the vehicle's wiring, the driver may not be able to shut off the cruise control either by depressing the brake pedal or manually turning the system off once it has been engaged, resulting in either the vehicle maintaining its current speed or possibly accelerating.

Consequence: If the vehicle maintains its speed or accelerates despite attempts to deactivate the cruise control, there would be an increased risk of a crash.

Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June 4, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Note: Owners are advised to stop using cruise control until the software update has been performed. In the event that cruise control cannot be disengaged while driving, owners should firmly and steadily apply the brakes and shift the transmission to neutral, placing the vehicle in park once it has stopped.

18V281000 · Power Train:driveline:driveshaft

May 1, 2018

Chrysler (FCA US LLC) is recalling certain 2015-2018 Dodge Charger pursuit police vehicles equipped with all-wheel drive and V8 engines. The front driveshaft universal joint may seize or fracture causing the shaft to detach from the vehicle.

Consequence & remedy

Consequence: If the front driveshaft detaches from the vehicle it may become a road hazard, increasing the risk of a crash.

Remedy: Chrysler will notify owners, and dealers will replace the front driveshaft, free of charge. The recall began June 27, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is U37.

17V824000 · Equipment

Dec 21, 2017

Chrysler (FCA US LLC) is recalling various Dodge, Chrysler, and RAM vehicles equipped with Kidde Plastic-Handle or Push Button 'Pindicator' Fire Extinguishers. A list of the affected trailer models is available at: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17V824-0103.pdf. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or requiring excessive force to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17E062-5427.pdf

Consequence & remedy

Consequence: If the fire extinguisher does not function properly, it can increase the risk of injury in the event of a fire.

Remedy: Chrysler will notify owners instructing them to contact Kidde for a replacement fire extinguisher, free of charge. The recall began February 14, 2018. Owners may contact Chrysler customer service at 1-800-853-1403 or Kidde customer service service toll-free at 1-855-262-3540, or online at www.kidde.com and click on "Product Safety Recall" for more information. Chrysler's number for this recall is T82.

17V097000 · Power Train:axle Assembly:axle Shaft

Feb 14, 2017

Chrysler (FCA US LLC) is recalling certain 2014-2017 Dodge Charger and Chrysler 300 vehicles equipped with all-wheel drive (AWD). The front driveshaft bolts may loosen and allow the front driveshaft to disconnect, potentially causing a loss of motive power.

Consequence & remedy

Consequence: A loss of motive power can increase the risk of a crash.

Remedy: Chrysler will notify owners, and dealers will replace all eight front driveshaft bolts, free of charge. The recall began April 7, 2017. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is T03.

16V043000 · Structure

Jan 28, 2016

FCA US LLC (Chrysler) is recalling certain model year 2011-2016 Dodge Charger vehicles manufactured August 23, 2010, to January 7, 2016. When an affected vehicle is lifted using the supplied tire jack without chocking the wheels, the vehicle's body-side sill may give causing the tire jack to fail and the car to fall.

Consequence & remedy

Consequence: A car that falls unexpectedly increases the risk of injury.

Remedy: Chrysler will notify owners, and dealers will provide owners with wheel chocks and instructions for their use, free of charge. The recall began on March 21, 2016. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is S03.

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.