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2015 BMW 328I

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2015 BMW 328I do not stand out strongly from the model-year median of 98.

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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

48 reports with mileage · 76 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 56 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 42 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 23 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

6 crash reports8 fire reports2 injury reports

Service Brakes complaints

9 reports
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Mileage unknown · Feb 19, 2026
Service Brakes

My 2015 BMW 328i has a broken "plastic" parking brake cable bracket. It breaks so often on the BMW lineup of cars that businesses have made better work-arounds to fix the problem than a plastic part. A fantastic video explain it can be found at AGATools.com search BMW parking brake. It is on Youtube as well. When the plastic…

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My 2015 BMW 328i has a broken "plastic" parking brake cable bracket. It breaks so often on the BMW lineup of cars that businesses have made better work-arounds to fix the problem than a plastic part. A fantastic video explain it can be found at AGATools.com search BMW parking brake. It is on Youtube as well. When the plastic parking cable holder breaks, which it will, BMW has to lower or remove the gas tank to fix a $5 part...the labor is over $800. The parking brake cable becomes loose and wears on the drive shaft, making noise throughout the cabin, but more importantly will wear and fail over time.

NHTSA ODI #11719111

Mileage unknown · Sep 26, 2025
Power TrainService Brakes

Virtually all parking brake cable attachment clips fail on this BMW product years 2012 to 2019. Complaints are easy to find online. Upon failure, the parking brake cable drops down onto the drive shaft creating a safety hazard for the brake system as well as the drive shaft mechanism. The piece that fails (breaks) costs less tha…

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Virtually all parking brake cable attachment clips fail on this BMW product years 2012 to 2019. Complaints are easy to find online. Upon failure, the parking brake cable drops down onto the drive shaft creating a safety hazard for the brake system as well as the drive shaft mechanism. The piece that fails (breaks) costs less than $20, but replacement costs $1200 due to labor intensive access. I have repeatedly contacted BMW of North America, but they refuse to own this serious issue. Even the people at the BMW dealership here are surprised that there has been no recall. Please advise.

NHTSA ODI #11689985

Mileage unknown · Feb 2, 2024
Service BrakesCrash

I drove my car to a parking garage yesterday. As I was pulling into a parking spot slowly, my car started to accelerate. I then pressed the brake pedal harder and the car went faster. The car stopped by hitting the wall in front. All airbags came out. The police came for the investigation. The car was not functioning so the poli…

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I drove my car to a parking garage yesterday. As I was pulling into a parking spot slowly, my car started to accelerate. I then pressed the brake pedal harder and the car went faster. The car stopped by hitting the wall in front. All airbags came out. The police came for the investigation. The car was not functioning so the police called the towing company to remove my car. No one was hurt, except some scratches and bruises on the face, chest and legs. No damage to the wall. But there is enough damage to my car so that the insurance company is deciding whether it has been totaled. I found online posts that people reported similar situations with the same model car (BMW328i). It could be related to accelerator module defects based on the online posts.

NHTSA ODI #11569590

Mileage unknown · Dec 26, 2023
EngineService Brakes

On BMW there is a consistent problem with the oil filter housing gasket leaking oil which runs down and gets on the V-belt causing slipping that affects power steering. It is common problem for the emergency brake plastic clip to brake and cause the emergency brake cable that runs above the drive shaft to scrape the driveshaft,…

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On BMW there is a consistent problem with the oil filter housing gasket leaking oil which runs down and gets on the V-belt causing slipping that affects power steering. It is common problem for the emergency brake plastic clip to brake and cause the emergency brake cable that runs above the drive shaft to scrape the driveshaft, causing the cable to wear out and cause premature failure of the emergency brake.

NHTSA ODI #11561965

Mileage unknown · May 8, 2023
Fuel/propulsion SystemService BrakesCrash

My son's 2015, BMW 328i was taken to BMW in Canton, Ohio due to "fluttering" in gas pedal and "possible transmission slipping and variations in transmission while driving. The check engine light was on and was diagnosed at dealership that the Mass Flow Sensor was malfunctioning. The wires to the Mass Flow Sensor were corroded a…

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My son's 2015, BMW 328i was taken to BMW in Canton, Ohio due to "fluttering" in gas pedal and "possible transmission slipping and variations in transmission while driving. The check engine light was on and was diagnosed at dealership that the Mass Flow Sensor was malfunctioning. The wires to the Mass Flow Sensor were corroded and needed fixed before sensor could be assessed. The wires were fixed and the check engine light went out so the car was considered by the BMW dealer service department to be fixed and I paid $545 for $42 in parts and $503 in labor. The service advisor named Mark, assured me that it had been test driven by service technician and that the car was in proper working condition. I picked the car up, for my son, at 10 am and drove south to West Virginia to deliver the car to my son. At 12:15, I pulled off the freeway and stopped at a light that was at a busy intersection, with a car in front of me. I came to a complete stop with my foot on the brake and my car accelerated at a high speed with my foot completely on the brake almost to the floor. I rammed into the car in front of me and the car flew forward 500 feet. My BMW stopped after it hit the car in front of me. I sat in the car in shock with my foot still on the brake as the driver in front of me came to my window and asked me " what the hell are you doing"? She could clearly see that my foot was still on the brake. There were minor scratches on her bumper and, her and her son had sore necks. The front of my car had a broken grill, and other broken pieces. Broken pieces were lying on thre road. I called AAA and had it towed to BMW in St. Albans, West Virginia. A call was made to Canton, BMW and Corporate BMW to make a report on BMW rapidly accelerating with brakes completely on. Corporate personelle are to call me to get a report from me and send a special team to investigate the "rapid acceleration" while the brakes were on. Now awaiting for the 2015 BMW 328i to be looked at.

NHTSA ODI #11521081

Mileage unknown · Feb 1, 2023
Fuel/propulsion SystemService BrakesUnknown Or OtherCrashInjury

Reporting very dangerous sudden unintended acceleration of 2015 BMW 328i: When about to back out of a parking space in a parking garage, I pressed the brakes and turned on the ignition switch. After looking around to ensure no cars or people were near the car, I put the gear shift in reverse, turned my whole head entirely over m…

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Reporting very dangerous sudden unintended acceleration of 2015 BMW 328i: When about to back out of a parking space in a parking garage, I pressed the brakes and turned on the ignition switch. After looking around to ensure no cars or people were near the car, I put the gear shift in reverse, turned my whole head entirely over my right shoulder to look through the back windshield and, seeing nothing behind me, began to slowly lift my foot from the brake to reverse out of the parking space. I turned the steering wheel towards the left and the back of the car went to the left. The bumper gently tapped a white column that had been out of sight all the way further over my right shoulder. I gently pressed on the brake, and when I switched the gear shift into drive, the car suddenly and explosively accelerated forward extremely fast and sped out of control. I pressed the brakes to stop the car, which did nothing, and the car slammed into cement wall so hard that it sounded like an explosion and the air bags deployed. I hit my mouth/face/head on the air bag and got whiplash from the sudden stop. When I got out of the car, a couple who’d heard the explosion drove by and asked if I was ok. After a few moments I reached into the car to turn off ignition switch. This event resulted in very serious damage to the car, which was totaled, and I received medical injuries. This incident was reported to my automobile insurance company and to North America BMW, who has escalated the report to higher levels due to the seriousness of the incident, and will be doing investigations this week. The accelerator pedal or gear box dangerously and seriously malfunctioned, and the car is available for inspection upon request. My safety was seriously at risk as I have headaches and whiplash symptoms. If there were no wall there, or if there had been people or cars anywhere in front of the car, they would have been killed and smashed because the car suddenly accelerated so quickly.

NHTSA ODI #11504968

43,000 miles · Aug 11, 2020
Service Brakes

BRACKET USED TO HOLD EMERGENCY BRAKE LINE TO PANEL SNAPPED AND NOW BRAKE LINE IS RUNNING UP AGAINST THE DRIVE SHAFT WHICH COULD CAUSE CABLE TO SNAP. THIS SEEMS TO BE WEAR AND TEAR AS NOTHING HAPPENED TO THE VEHICLE TO HAVE THIS HAPPENED. MULTIPLE PEOPLE HAVE REPORTED THIS HAPPENING TO 2014-2016 VEHICLES AND SEEMS TO BE A SIMILAR…

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BRACKET USED TO HOLD EMERGENCY BRAKE LINE TO PANEL SNAPPED AND NOW BRAKE LINE IS RUNNING UP AGAINST THE DRIVE SHAFT WHICH COULD CAUSE CABLE TO SNAP. THIS SEEMS TO BE WEAR AND TEAR AS NOTHING HAPPENED TO THE VEHICLE TO HAVE THIS HAPPENED. MULTIPLE PEOPLE HAVE REPORTED THIS HAPPENING TO 2014-2016 VEHICLES AND SEEMS TO BE A SIMILAR ISSUE THAT HAPPENED ON RECALL OF THE 2001 M3.

NHTSA ODI #11348576

Mileage unknown · Jun 5, 2019
Electronic Stability Control (esc)Service BrakesSuspension

CHASSIS STABILIZATION LIGHT ON. DRIVE MODERATELY. ABS LIGHT ON. BRAKE LIGHT ON. PICTURE OF A CAR SKIDDING. THESE WARNINGS COME ON WHEN VEHICLE IS STATIONARY OR IN MOTION.

NHTSA ODI #11218028

36,000 miles · Oct 16, 2017
Service BrakesCrash

I WAS INVOLVED IN A CAR ACCIDENT INVOLVING FAILURE FOR THE CAR TO BRAKE PROPERLY AND REVING UP AFTER BEING ALMOST AT A COMPLETE STOP. I WAS DRIVING ON A TWO LANE ROAD AT APPROXIMATELY 35 MPH BEFORE NEEDING TO STOP. I APPLIED MY BRAKES AT A REASONABLE DISTANCE TO STOP FOR THE TRAFFIC AHEAD FOR A TRAFFIC LIGHT. IT WAS NOT A SUDD…

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I WAS INVOLVED IN A CAR ACCIDENT INVOLVING FAILURE FOR THE CAR TO BRAKE PROPERLY AND REVING UP AFTER BEING ALMOST AT A COMPLETE STOP. I WAS DRIVING ON A TWO LANE ROAD AT APPROXIMATELY 35 MPH BEFORE NEEDING TO STOP. I APPLIED MY BRAKES AT A REASONABLE DISTANCE TO STOP FOR THE TRAFFIC AHEAD FOR A TRAFFIC LIGHT. IT WAS NOT A SUDDEN STOP OR TAILGATING SITUATION. I APPLIED MY BRAKES AND THE CAR CAME TO A STOP OR VERY NEAR STOP APPROXIMATELY 18 INCHES FROM THE REAR BUMPER OF THE CAR AHEAD OF ME. IT SUDDENLY REVVED UP AND ACCELERATED AND MOVED FORWARD WHILE MY FOOT WAS DEPRESSED FIRMLY ON THE BRAKE AT ALL TIMES. THE REVVING CONTINUED FOR SECONDS AND THE CAR LUNGED FORWARD SEVERAL TIMES. IT HIT THE CAR THE FIRST TIME AND CONTINUED REVVING AND MOVED FORWARD HITTING THE CAR IN FRONT SEVERAL TIMES. THE CAR IN FRONT WAS AT A COMPLETE STOP ALL READY WHEN I HIT IT. MY CAR WOULD NOT STOP DESPITE MY CONTINUING TO HOLD THE BRAKE DOWN FIRMLY.. IT CONTINUED TO HIT THE CAR IN FRONT OF ME 3 OR 4 TIMES BEFORE FINALLY STOPPING. THIS RESULTED IN THREE SUBSEQUENT CARS IN FRONT OF ME ALL BEING PUSHED INTO EACH OTHER. I ADVISED MY INSURANCE CARRIER AND POLICE OF THE SITUATION. THE CAR WAS TOWED TO THE BMW DEALER NEAR ME TODAY, OCTOBER 16TH AND I TOLD THEM OF THE SITUATION. I HAVE BEEN DRIVING 40 YEARS AND NEVER EXPERIENCED ANYTHING LIKE THIS AND AM VERY VERY CERTAIN THE BRAKE WAS DEPRESSED AND THE CAR AND IT WAS NOT DRIVER ERROR. I DO NOT FEEL SAFE DRIVING THIS CAR AND AM PRESENTLY AWAITING TO HEAR BACK FROM THE CAR DEALER TO HEAR OF THEIR FINDINGS. IN SPEAKING WITH THE MECHANIC (NOT THE SERVICE ADVISOR WHO WAS FINE) AND TELLING HIM THE SPECIFICS AS STATED HERE, I SENSED SKEPTICISM THAT THIS ACTUALLY OCCURRED.

NHTSA ODI #11033956

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.

24V527000 · Air Bags:frontal:driver Side:inflator Module

Jul 11, 2024

BMW of North America, LLC (BMW) is recalling certain 2015 6 Series Gran Coupe, 2014 5 Series Gran Turismo, 2014 5 Series Sedan, 2015 6 Series Convertible, 2015 6 Series Coupe, 2014 X5, 2013-2014 X3, 2014-2015 3 Series Sedan, 2014 4 Series Coupe, 2014 4 Series Convertible, 2014 3 Series Gran Turismo, and 2015 4 Series Gran Coupe vehicles. Please see the recall report for the complete list of models. The driver's air bag inflator may explode during deployment, due to a manufacturing defect.

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, increasing the risk of injury or death.

Remedy: The driver's front air bag will be replaced, free of charge. Owner notification letters were mailed September 6, 2024. Owners may contact BMW customer service at 1-800-525-7417.

24V288000 · Air Bags:side/window

Apr 24, 2024

BMW of North America, LLC (BMW) is recalling certain 2014-2015 2 Series Coupe (228i, 228i xDrive, M235i), 3 Series Sedan (320i, 320i xDrive, 328i, 328i xDrive, 335i, 335i xDrive, M3, 328d, 328d xDrive), 4 Series Coupe (428i, 428i xDrive, 435i, 435i xDrive, M4), and 2015 4 Series Gran Coupe (428i, 428i xDrive, 435i, 435i xDrive) vehicles. The head air bag inflator may fail at the weld joint, which can cause gas to leak from the inflator or result in an inflator rupture.

Consequence & remedy

Consequence: An inflator that ruptures may cause sharp metal fragments to enter or exit the vehicle, increasing the risk of injury. Additionally, an inflator that leaks gas may only partially inflate during a crash, increasing the risk of injury.

Remedy: Dealers will replace the head air bags, free of charge. Owner notification letters were mailed November 4, 2024. Owners may contact BMW customer service at 1-800-525-7417.

15V520000 · Exterior Lighting

Aug 17, 2015

BMW North America, LLC (BMW) is recalling certain model year 2012-2015 320i, 320xi, 328i, 328xi, 335i, 335xi, and ActiveHybrid3 vehicles manufactured October 20, 2011, to June 22, 2015, 2014-2015 328xi Sports Wagon vehicles manufactured March 21, 2013, to March 17, 2015, 2014-2015 328d, 328xd vehicles manufactured June 28, 2013, to April 21, 2015, and 2014-2015 328xd Sports Wagon vehicles manufactured July 5, 2013, to April 21, 2015. The affected vehicles may have been programmed with new software that inadvertently makes the front side marker lights inoperative in conjunction with the parking lights or the headlights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."

Consequence & remedy

Consequence: If the side marker lights do not illuminate, the vehicle may be less visible at night, increasing the risk of a crash.

Remedy: BMW will notify owners, and dealers will upload revised software to correct the issue, free of charge. The recall began on October 7, 2015. Owners may contact BMW customer service at 1-800-525-7417 or by email at CustomerRelations@bmwusa.com.

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.