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2016 BMW 528I

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2016 BMW 528I do not stand out strongly from the model-year median of 46.

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How this year compares

Owner complaints by model year

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

20 reports with mileage · 39 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Electrical System. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 26 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

1 crash reports4 fire reports2 injury reports

What owners actually said

59 reports
Mileage unknown · Jul 29, 2026
Fuel/propulsion System

Vehicle: 2016 BMW 528i xDrive (VIN: [XXX]) Safety Issue / Defect Description: Strong, hazardous raw gasoline fumes began entering the passenger cabin and trunk area. On XXX, the vehicle was brought to an authorized dealership (BMW of Sterling) for diagnostic evaluation. The dealership's technician conducted a multi-point inspe…

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Vehicle: 2016 BMW 528i xDrive (VIN: [XXX]) Safety Issue / Defect Description: Strong, hazardous raw gasoline fumes began entering the passenger cabin and trunk area. On XXX, the vehicle was brought to an authorized dealership (BMW of Sterling) for diagnostic evaluation. The dealership's technician conducted a multi-point inspection and produced video evidence documenting fluid leaking from the top of the plastic fuel tank. The dealership issued Repair Order Quote #$4,824.92 to "REPLACE FUEL TANK DUE TO FUEL LEAK" and declared the vehicle unsafe. Despite diagnosing a structural fuel tank leak that allows raw gasoline and fumes to migrate into the cabin—presenting an immediate fire, explosion, and toxic vapor risk—BMW of North America and the dealership have refused warranty coverage or goodwill assistance, claiming the tank is "not leaking actively enough" under Service Bulletin SI B01 03 22 (NHTSA ID: MC-10212779-9999). An uncontained raw fuel leak on a plastic fuel tank is a critical safety defect that requires immediate investigation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI #11753570

Mileage unknown · Jul 20, 2026
Fuel/propulsion System

The vehicle developed a strong, toxic odor of raw gasoline inside the passenger cabin and trunk area. The vehicle was brought to an authorized franchise, BMW of Sterling, where technicians performed a multi-point inspection. The technician confirmed that the factory plastic fuel tank assembly is structurally defective and leakin…

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The vehicle developed a strong, toxic odor of raw gasoline inside the passenger cabin and trunk area. The vehicle was brought to an authorized franchise, BMW of Sterling, where technicians performed a multi-point inspection. The technician confirmed that the factory plastic fuel tank assembly is structurally defective and leaking raw fuel from the top weld seams. The dealer provided an official invoice quoting $4,824.92 to replace the tank due to the fuel leak, noting it is an active hazard, but refused to cover the failure under BMW’s active 15-year/150,000-mile extended warranty for N20 plastic fuel tanks (SI B01 03 22). Driving a vehicle with raw fuel pooling on the exterior of the tank and migrating into the cabin creates an immediate fire hazard and health risk to occupants."

NHTSA ODI #11751663

32,400 miles · Feb 23, 2026
Engine

The contact owns a 2016 BMW 528i. The contact stated that the vehicle was repaired under an unknown recall, and after the recall repair, while driving at an undisclosed speed, there was an abnormal oil-burning odor entering the cabin of the vehicle. The vehicle was taken to a local Midas, where it was discovered that oil was lea…

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The contact owns a 2016 BMW 528i. The contact stated that the vehicle was repaired under an unknown recall, and after the recall repair, while driving at an undisclosed speed, there was an abnormal oil-burning odor entering the cabin of the vehicle. The vehicle was taken to a local Midas, where it was discovered that oil was leaking onto the engine. The vehicle was not repaired due to the cost. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 32,400.

NHTSA ODI #11719874

Mileage unknown · Feb 9, 2026
Exterior Lighting

I have 2016 BMW 5 series car, for past two to three years headlights are getting condensation inside on colder months. Dealer is not able to fix the condensation, they are advising to replace the headlights. Some of my friends replaced OEM headlights, but after few years they are started condensation, it’s looked like defect fro…

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I have 2016 BMW 5 series car, for past two to three years headlights are getting condensation inside on colder months. Dealer is not able to fix the condensation, they are advising to replace the headlights. Some of my friends replaced OEM headlights, but after few years they are started condensation, it’s looked like defect from manufacturer, I had few Honda vehicles older than my BMW car, they never had any condensation complaints. It’s look like manufacturer used cheap materials causing condensation, it is causing low light at night times may lead to accidents. Please look at this issue and consider it as a safety issue and please recall these headlights. Dealer is asking $2500 + $500 labor to fix each headlight. All of my friends are having same problem, I bet other BMW car owners too. Please issue a recall on this safety issue.

NHTSA ODI #11716890

Mileage 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…

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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 …

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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 · Sep 12, 2025
Engine

During initial cold starts there is blue smoke billowing from the exhaust for approx 20 seconds. The odor is horrible.

NHTSA ODI #11687010

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…

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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 22, 2025
Exterior Lighting

My driver headlight is constantly getting moisture trapped in it. It’s been replaced twice and the seals were checked, but it keeps happening and shorting out my headlight. It’s $4000 to fix. Just had it replaced 1.5 weeks ago and it’s broken already. I took it to bmw the moment I noticed the moisture was back and they told me i…

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My driver headlight is constantly getting moisture trapped in it. It’s been replaced twice and the seals were checked, but it keeps happening and shorting out my headlight. It’s $4000 to fix. Just had it replaced 1.5 weeks ago and it’s broken already. I took it to bmw the moment I noticed the moisture was back and they told me it was fine. This is a widespread problem and they are not fixing their product

NHTSA ODI #11682405

Mileage unknown · Aug 21, 2025
Engine

Multiple critical BMW engine components are manufactured from plastic, including the oil pan, coolant expansion tank, valve cover, and turbo inlet pipe. These parts are prone to premature failure from normal heat & stress, as confirmed by independent mechanics. Failures can cause sudden loss of oil or coolant, persistent oil lea…

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Multiple critical BMW engine components are manufactured from plastic, including the oil pan, coolant expansion tank, valve cover, and turbo inlet pipe. These parts are prone to premature failure from normal heat & stress, as confirmed by independent mechanics. Failures can cause sudden loss of oil or coolant, persistent oil leaks, overheating, loss of power, and roadside breakdowns. The use of plastic for an oil pan is concerning. Plastic cannot withstand impacts with common road hazards such as tire fragments, etc. Striking a retread at highway speed could easily crack the pan, dump all engine oil, and lead to catastrophic engine seizure, endangering people. In my case (2016 BMW 528i), several plastic components have already failed, including the oil pan, turbo inlet pipe, coolant expansion tank, valve cover, and multiple coil packs. While BMW considers coil pack replacement a normal maintenance item, there are widespread complaints of premature failures. Most of the heat-related plastic failures occur above 70,000 miles. Despite several related breakdowns, the previous owner and I avoided dangerous situations. These failures are widely documented by other owners online and by independent mechanics, who often recommend aftermarket aluminum replacements for improved safety and reliability. BMW is aware of these issues but continues to use plastic for critical components--they recently lost a class-action lawsuit related to internal plastic engine parts that caused catastrophic engine damage, showing prior knowledge of the risks. These failures also create environmental hazards, as leaking plastic oil pans & valve covers contaminate roads and driveways. Because repairs are $$$, many consumers delay fixing the problems, increasing both safety and environmental risks. This design prioritizes cost savings over durability and safety. These parts should be made of metal to withstand normal use and protect drivers, passengers, and the public from unnecessary hazards.

NHTSA ODI #11682147

Official recalls

4

24V608000 · Electrical System:wiring:connectors/plugs/receptacles; Engine And Engine Cooling:cooling System:pump

Aug 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.

16V914000 · Air Bags

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.

16V747000 · Seat Belts:front:retractor

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.

15V718000 · Child Seat; Seats:mid/rear Assembly

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

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.