WHEN TRANSMISSION DOWNSHIFTS TO 2ND GEAR, SUDDEN AND COMPLETE LOSS OF POWER WHEN TURNING. HAPPENS WITH DCT TRANSMISSION WITH LATEST SOFTWARE. MANY SIMILAR COMPLAINTS ON BMW MESSAGE BOARDS, AND BMW IS BASICALLY IGNORING US. *TR
2009 BMW M3
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all M3 years →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
39 reports with mileage · 6 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.
- Power Train. Review the 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Air Bags. Review the 8 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
45 reportsI OWN A 2009 BMW M3. IT HAS THE MDCT TRANSMISSION. THERE IS A DELAY WHEN COMING TO A ROLLING STOP AND THEN TRYING TO ACCELERATE AGAIN. THE DELAY OCCURS WHEN PUSHING THE ACCELERATOR AND WHEN THE ENGINE/TRANSMISSION ACTUALLY ENGAGES AND MOVES FORWARD. THE DELAY IS AS LONG AS 1-1.5 SECONDS. THIS HAS NEARLY CAUSED SEVERAL ACCID…
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I OWN A 2009 BMW M3. IT HAS THE MDCT TRANSMISSION. THERE IS A DELAY WHEN COMING TO A ROLLING STOP AND THEN TRYING TO ACCELERATE AGAIN. THE DELAY OCCURS WHEN PUSHING THE ACCELERATOR AND WHEN THE ENGINE/TRANSMISSION ACTUALLY ENGAGES AND MOVES FORWARD. THE DELAY IS AS LONG AS 1-1.5 SECONDS. THIS HAS NEARLY CAUSED SEVERAL ACCIDENTS. BMW SAYS THIS IS NORMAL BEHAVIOR, BUT I DON'T BELIEVE IT TO BE THE CASE. IT SEEMS LIKE THE TRANSMISSION DOESN'T DOWNSHIFT AT LOWER SPEEDS. IN FACT, ONLY "THINKING" AND PROCEEDING TO DOWNSHIFT AFTER THE ACCELERATOR IS APPLIED. BY THEN, IT'S TOO LATE. AS A DRIVER, YOU EXPECT FORWARD MOMENTUM AS SOON AS THE ACCELERATOR IS APPLIED... NOT THAT IT DOWN SHIFTS AT THAT POINT. PLUS, THE READING DISPLAY SUGGESTS IT IS IN FACT DOWNSHIFTED TO 2ND GEAR... BUT I ASSURE YOU, THAT'S NOT THE POINT. THIS HAPPENS EVERY TIME THE SCENARIO IS MENTIONED. SAY COMING FROM 35 MPH OR HIGHER SO THE VEHICLE IS IN A HIGHER GEAR (5 OR 6) AND THEN YOU SLOW TO SAY 10 MPH AND THEN TRY TO ACCELERATE.... SAY IN STOP AND GO TRAFFIC. *TR
THIS OCCURS REGULARLY, PERHAPS 10 TIMES PER WEEK OR MORE DEPENDING ON SEVERITY. ON DECELERATION, THE TRANSMISSION WILL DISENGAGE THE DRIVELINE. WHEN THE THROTTLE IS DEPRESSED AGAIN TO ACCELERATE, THERE IS A LONG DELAY (GREATER THAN 1 SECOND). THIS OCCURS AT SLOW SPEEDS (LESS THAN 20 MPH), FOR EXAMPLE WHEN ENTERING A LEFT TURN…
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THIS OCCURS REGULARLY, PERHAPS 10 TIMES PER WEEK OR MORE DEPENDING ON SEVERITY. ON DECELERATION, THE TRANSMISSION WILL DISENGAGE THE DRIVELINE. WHEN THE THROTTLE IS DEPRESSED AGAIN TO ACCELERATE, THERE IS A LONG DELAY (GREATER THAN 1 SECOND). THIS OCCURS AT SLOW SPEEDS (LESS THAN 20 MPH), FOR EXAMPLE WHEN ENTERING A LEFT TURN LANE WITH ONCOMING TRAFFIC. I HAD THIS BEHAVIOR DUPLICATED FOR A BMW TECHNICIAN WHO, UPON FURTHER RESEARCH, INDICATED THAT BMW WAS AWARE OF THIS ISSUE AND HAS DECLARED IT "NORMAL OPERATION". IT IS ONLY A MATTER OF TIME BEFORE A SERIOUS ACCIDENT IS CAUSED BY THIS ISSUE. *TR
IN THE 2009 BMW M3 SEDAN WITH DCT (DUAL CLUTCH) TRANSMISSION, THERE IS A SIGNIFICANT LAG OR HESITATION OF AT LEAST 1 SECOND BETWEEN APPLYING PRESSURE TO THE ACCELERATOR AND THE CLUTCH ENGAGING AND GIVING ACCELERATION TO THE WHEELS. THIS DOES NOT HAPPEN FROM A STAND-STILL, BUT OCCURS PRIMARILY WHEN THE CAR IS IN MOTION AT VIRTUAL…
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
MY 09 BMW M3 WITH DCT IS EXHIBITING GEAR SHIFTING SLOWNESS AND POWER LAGGING PROBLEMS AFTER HARD BRAKING. THE MOST RECENT INCIDENT WAS A NEAR REAR END COLLISION TODAY THAT REQUIRED ME TO BRAKE HARD FROM 70MPH, TO 40, SWITCH LANES AND ACCELERATE TO AVOID BEING HIT BY APPROACHING TRAFFIC FROM BEHIND. WHEN I ATTEMPTED TO ACCELERATE…
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MY 09 BMW M3 WITH DCT IS EXHIBITING GEAR SHIFTING SLOWNESS AND POWER LAGGING PROBLEMS AFTER HARD BRAKING. THE MOST RECENT INCIDENT WAS A NEAR REAR END COLLISION TODAY THAT REQUIRED ME TO BRAKE HARD FROM 70MPH, TO 40, SWITCH LANES AND ACCELERATE TO AVOID BEING HIT BY APPROACHING TRAFFIC FROM BEHIND. WHEN I ATTEMPTED TO ACCELERATE, THE CAR DID NOT RESPOND FOR WHAT SEEMED LIKE A COUPLE SECONDS. THE LAG WAS LONG ENOUGH THAT THE CAR BEHIND ME WAS FORCED TO LEAVE THE ROAD TO AVOID HITTING ME. *TR
Official recalls
520V017000 · Air Bags:frontal:driver Side:inflator Module
Jan 15, 2020
BMW of North America, LLC (BMW) is recalling certain 2008-2013 128i and 135i Convertibles, 128i, 135i, and M Coupes, 2007-2010 X3 30si and X3 xDrive30i, 2013-2015 X1 sDrive28i, X1 xDrive28i and X1 xDrive35i, 2007-2013 328i, 328i xDrive, 335i, 335is, 335i xDrive and M3 Coupes, 2006-2011 328i, 328xi, 328i xDrive, 325i, 325xi, 330i, 330xi, 335i, 335xi, 335i xDrive and M3, 2009-2011 335D, 2006-2012 325xi, 328i, 328xi and 328i xDrive, 2010-2011 X6 ActiveHybrid, 2007-2013 328i, 335i, 335is, M3 Coupes, X5 30si, X5 xDrive30i, X5 xDrive35i, X5 48i, X5 xDrive48i, X5 xDrive50i and X5 M, 2009-2013 X5 xDrive35d and 2008-2014 X6 xDrive35i, X6 xDrive50i and X6M vehicles equipped with non-desiccated driver frontal air bag inflators containing phase stabilized ammonium nitrate (PSAN) that were used as interim remedy parts for previous Takata recalls. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.
Consequence & remedy
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: BMW will notify owners, and dealers will replace the driver air bag. On X5 and X6 vehicles, only the inflator will be replaced. All repairs will be performed free of charge. The recall began March 11, 2020. Owners may contact BMW customer service at 1-800-525-7417.
19V472000 · Electrical System; Electrical SYSTEM:12V/24V/48V Battery:cables; Electrical System:wiring:fuses And Circuit Breakers
Jun 19, 2019
BMW of North America, LLC (BMW) is recalling certain 2009 328i and 328xi, 2009-2011 335d, 2008-2012 M3 Coupe and M3 Convertible, and 2008-2011 M3 Sedan vehicles. The connection of the positive battery cable at the fuse box terminal may degrade, resulting in an intermittent loss of electrical power.
Consequence & remedy
Consequence: A loss of electrical power can cause the vehicle to stall, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace and secure the positive battery cable connector, free of charge. The recall began August 14, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion of a previous recall, number 18V-314.
Additional source detail variants (3)
Electrical System:wiring:fuses And Circuit Breakers
BMW of North America, LLC (BMW) is recalling certain 2009 328i and 328xi, 2009-2011 335d, 2008-2012 M3 Coupe and M3 Convertible, and 2008-2011 M3 Sedan vehicles. The connection of the positive battery cable at the fuse box terminal may degrade, resulting in an intermittent loss of electrical power.
Consequence: A loss of electrical power can cause the vehicle to stall, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace and secure the positive battery cable connector, free of charge. The recall began August 14, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion of a previous recall, number 18V-314.
Electrical SYSTEM:12V/24V/48V Battery:cables
BMW of North America, LLC (BMW) is recalling certain 2009 328i and 328xi, 2009-2011 335d, 2008-2012 M3 Coupe and M3 Convertible, and 2008-2011 M3 Sedan vehicles. The connection of the positive battery cable at the fuse box terminal may degrade, resulting in an intermittent loss of electrical power.
Consequence: A loss of electrical power can cause the vehicle to stall, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace and secure the positive battery cable connector, free of charge. The recall began August 14, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion of a previous recall, number 18V-314.
Electrical System
BMW of North America, LLC (BMW) is recalling certain 2009 328i and 328xi, 2009-2011 335d, 2008-2012 M3 Coupe and M3 Convertible, and 2008-2011 M3 Sedan vehicles. The connection of the positive battery cable at the fuse box terminal may degrade, resulting in an intermittent loss of electrical power.
Consequence: A loss of electrical power can cause the vehicle to stall, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace and secure the positive battery cable connector, free of charge. The recall began August 14, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion of a previous recall, number 18V-314.
17V676000 · Electrical System:wiring
Oct 25, 2017
BMW of North America, LLC (BMW) is recalling certain 2006-2011 323i, 325i, 325xi, 328i, 328xi, 330i, 330xi, 335i, 335xi and M3, 2007-2011 328i xDrive, 335i xDrive and 335is and 2009-2011 335d vehicles. The wiring and electrical connectors for the system that controls air flow for the heating and air conditioning system may overheat.
Consequence & remedy
Consequence: Wiring that overheats could cause the electrical connectors to melt, and increase the risk of a fire, even when the vehicle is unattended.
Remedy: BMW will notify owners, and dealers will replace the wiring and electrical connectors, free of charge. Interim letters were mailed on November 27, 2017. Owners will receive a second notice when the remedy becomes available. Owners may contact BMW customer service at 1-800-525-7417.
16V071000 · Air Bags:frontal:driver Side:inflator Module
Feb 5, 2016
BMW of North America, LLC (BMW) is recalling certain model year 2008-2013 128i and 135i coupes and convertibles and 1 Series M coupes, 2006-2011 325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi, 335i, 335xi, 335i xDrive Sedans, 2009-2011 335d sedans, 2006-2012 325xiT, 328i and 328xi sports wagons, 2007-2013 328i, 328xi, 328i xDrive, 335i, 335xi, 335i xDrive, 335is and M3 Coupes and Convertibles, 2013-2015 X1 sDrive28i, X1 xDrive28i and X1 xDrive35i SAVs, 2007-2010 X3 xDrive30i SAVs, 2007-2013 X5 xDrive30i, X5 xDrive35i, X5 xDrive48i, X5 xDrive50i and X5 M SAVs, 2009-2013 BMW X5 xDrive35d SAVs, 2008-2014 X6 xDrive35i, X6 xDrive50i, and X6 M SACs, 2010-2011 BMW X6 xDrive50i SACs and 2008-2011 M3 Sedan vehicles. Upon deployment of the driver's frontal air bag, excessive internal pressure may cause the inflator to rupture.
Consequence & remedy
Consequence: In the event of a crash necessitating deployment of the driver's frontal air bag, the inflator could rupture with metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: BMW will notify owners, and dealers will replace the driver's frontal air bag module or inflator depending on the vehicle model, free of charge. The recall began March 9, 2018. Owners may contact BMW customer service at 1-800-525-7417.
08V595000 · Power Train:clutch Assembly
Nov 14, 2008
BMW IS RECALLING 2,500 MY 2008-2009 M3 PASSENGER VEHICLES WITH AN OPTIONAL DOUBLE CLUTCH TRANSMISSION. THE PROBLEM INVOLVES THE DOUBLE CLUTCH GEARBOX. IN A SITUATION OF RAPID VEHICLE DECELERATION, THE TRANSMISSION SOFTWARE MAY PERFORM A MULTISTAGE DOWNSHIFT.
Consequence & remedy
Consequence: IN THAT SITUATION, AT LOW VEHICLE SPEEDS, IT IS POSSIBLE FOR THE ENGINE TO STALL INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPROGRAM THE ENGINE AND TRANSMISSION ELECTRONIC CONTROL UNIT WITH UPDATED SOFTWARE FREE OF CHARGE. THE RECALL BEGAN ON DECEMBER 3, 2008. OWNERS MAY CONTACT BMW AT 1-800-831-1117.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1EA21002 · Desiccated Air Bag Inflator Rupture
Opened Sep 17, 2021 · No close date supplied
Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Additional source detail variants (2)
Air Bags:frontal:driver Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
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