2010 Jeep Wrangler

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.

Air Bags

On May 10, 2016, Fiat Chrysler America (FCA) submitted a Part 573 Defect Information Report announcing NHTSA recall 16V290 involving 394,258 model year (MY) 2007-2010 Jeep Wrangler vehicles.Under the recall FCA will replace the clockspring and install a steering wheel back cover and steering wheel column shroud.This recall also includes approx. 4,524 MY2007-2010 right hand drive (RHD) Jeep Wrangler vehicles commonly used for rural postal delivery services.In addition 7,180 MY 2011-2016 right hand drive Jeep Wrangler vehicles were also recalled under 16V288, the same remedy repair will be used.Upon review of the 1,942 MY 2007-2010 Jeep Wrangler consumer complaints, 17,195 warranty reports and field returned parts assessment, FCA concluded that a defect exists in the driver side clockspring assembly, a device that both connects (electrically) the driver air bag to the control module and allows rotational movement between the steering wheel and fixed steering column.Clockspring failure may compromise the air bag circuit causing illumination of the air bag warning lamp, and may result in non-deployment of the driver air bag in a frontal crash.FCA identified a contributing factor in that the recalled vehicles may be subjected to off-road dusty environments and/or usage with the vehicle roof top/doors removed thus allowing dust and moisture to enter the clockspring assembly.FCA advised that the MY 2011 and later Wrangler vehicles had an improved steering column cover/shroud that may reduce the amount of dirt/moisture that can enter the clockspring assembly.During the investigation FCA and the Office of Defects Investigation (ODI) also reviewed 193 MY 2011-2012 Jeep Wrangler consumer complaints, 3,918 warranty reports and field returned parts along with reports from other FCA vehicles that use the same clockspring assembly.Based on this review, the rate of repair and the failure mode does not indicate a defect trend at this time in the later MY Wrangler or other FCA vehicles.During the field return parts review, FCA found a significant number of MY 2011-2012 Wrangler returned parts that operated normally, the so called ?no trouble found? or NTF parts where no fault could be identified through bench testing.On June 10, 2016, FCA informed ODI of its intention to conduct a 15-yr, 150k mile extended warranty program due to the NTF issue and the MY 2011 and later vehicles having a somewhat elevated level of warranty replacement.Consumers will be notified of the program in writing.FCA will collect clocksprings replaced under the warranty extension program to further examine and study the root cause failure.ODI will monitor FCA?s analysis to determine if any further field action is warranted.Based on the actions taken by FCA to recall the MY 2007-2010 Jeep Wrangler vehicles and the MY 2008-2016 right hand drive Wrangler vehicles, this investigation is closed.FCA has also agreed to conduct a warranty extension and further evaluation of the MY 2011-2016 Wrangler.At the time of FCA's field data submission in PE 15-025 (September 2015), ODI was aware of a total of 416 MY 2007-2010 and 23 MY 2011-2012 VOQs relevant to this issue.In addition, there have been an additional 90 and 16 VOQs (respectively) received since the recall announcement (i.e., thru May 2016).The reports noted above can be viewed at SaferCar.gov under the reference (ODI) numbers cited on the attached listing.

Air Bags

On May 10, 2016, Fiat Chrysler America (FCA) submitted a Part 573 Defect Information Report announcing NHTSA recall 16V290 involving 394,258 model year (MY) 2007-2010 Jeep Wrangler vehicles.Under the recall FCA will replace the clockspring and install a steering wheel back cover and steering wheel column shroud.This recall also includes approx. 4,524 MY2007-2010 right hand drive (RHD) Jeep Wrangler vehicles commonly used for rural postal delivery services.In addition 7,180 MY 2011-2016 right hand drive Jeep Wrangler vehicles were also recalled under 16V288, the same remedy repair will be used.Upon review of the 1,942 MY 2007-2010 Jeep Wrangler consumer complaints, 17,195 warranty reports and field returned parts assessment, FCA concluded that a defect exists in the driver side clockspring assembly, a device that both connects (electrically) the driver air bag to the control module and allows rotational movement between the steering wheel and fixed steering column.Clockspring failure may compromise the air bag circuit causing illumination of the air bag warning lamp, and may result in non-deployment of the driver air bag in a frontal crash.FCA identified a contributing factor in that the recalled vehicles may be subjected to off-road dusty environments and/or usage with the vehicle roof top/doors removed thus allowing dust and moisture to enter the clockspring assembly.FCA advised that the MY 2011 and later Wrangler vehicles had an improved steering column cover/shroud that may reduce the amount of dirt/moisture that can enter the clockspring assembly.During the investigation FCA and the Office of Defects Investigation (ODI) also reviewed 193 MY 2011-2012 Jeep Wrangler consumer complaints, 3,918 warranty reports and field returned parts along with reports from other FCA vehicles that use the same clockspring assembly.Based on this review, the rate of repair and the failure mode does not indicate a defect trend at this time in the later MY Wrangler or other FCA vehicles.During the field return parts review, FCA found a significant number of MY 2011-2012 Wrangler returned parts that operated normally, the so called ?no trouble found? or NTF parts where no fault could be identified through bench testing.On June 10, 2016, FCA informed ODI of its intention to conduct a 15-yr, 150k mile extended warranty program due to the NTF issue and the MY 2011 and later vehicles having a somewhat elevated level of warranty replacement.Consumers will be notified of the program in writing.FCA will collect clocksprings replaced under the warranty extension program to further examine and study the root cause failure.ODI will monitor FCA?s analysis to determine if any further field action is warranted.Based on the actions taken by FCA to recall the MY 2007-2010 Jeep Wrangler vehicles and the MY 2008-2016 right hand drive Wrangler vehicles, this investigation is closed.FCA has also agreed to conduct a warranty extension and further evaluation of the MY 2011-2016 Wrangler.At the time of FCA's field data submission in PE 15-025 (September 2015), ODI was aware of a total of 416 MY 2007-2010 and 23 MY 2011-2012 VOQs relevant to this issue.In addition, there have been an additional 90 and 16 VOQs (respectively) received since the recall announcement (i.e., thru May 2016).The reports noted above can be viewed at SaferCar.gov under the reference (ODI) numbers cited on the attached listing.

Air Bags:frontal

On May 10, 2016, Fiat Chrysler America (FCA) submitted a Part 573 Defect Information Report announcing NHTSA recall 16V290 involving 394,258 model year (MY) 2007-2010 Jeep Wrangler vehicles.Under the recall FCA will replace the clockspring and install a steering wheel back cover and steering wheel column shroud.This recall also includes approx. 4,524 MY2007-2010 right hand drive (RHD) Jeep Wrangler vehicles commonly used for rural postal delivery services.In addition 7,180 MY 2011-2016 right hand drive Jeep Wrangler vehicles were also recalled under 16V288, the same remedy repair will be used.Upon review of the 1,942 MY 2007-2010 Jeep Wrangler consumer complaints, 17,195 warranty reports and field returned parts assessment, FCA concluded that a defect exists in the driver side clockspring assembly, a device that both connects (electrically) the driver air bag to the control module and allows rotational movement between the steering wheel and fixed steering column.Clockspring failure may compromise the air bag circuit causing illumination of the air bag warning lamp, and may result in non-deployment of the driver air bag in a frontal crash.FCA identified a contributing factor in that the recalled vehicles may be subjected to off-road dusty environments and/or usage with the vehicle roof top/doors removed thus allowing dust and moisture to enter the clockspring assembly.FCA advised that the MY 2011 and later Wrangler vehicles had an improved steering column cover/shroud that may reduce the amount of dirt/moisture that can enter the clockspring assembly.During the investigation FCA and the Office of Defects Investigation (ODI) also reviewed 193 MY 2011-2012 Jeep Wrangler consumer complaints, 3,918 warranty reports and field returned parts along with reports from other FCA vehicles that use the same clockspring assembly.Based on this review, the rate of repair and the failure mode does not indicate a defect trend at this time in the later MY Wrangler or other FCA vehicles.During the field return parts review, FCA found a significant number of MY 2011-2012 Wrangler returned parts that operated normally, the so called ?no trouble found? or NTF parts where no fault could be identified through bench testing.On June 10, 2016, FCA informed ODI of its intention to conduct a 15-yr, 150k mile extended warranty program due to the NTF issue and the MY 2011 and later vehicles having a somewhat elevated level of warranty replacement.Consumers will be notified of the program in writing.FCA will collect clocksprings replaced under the warranty extension program to further examine and study the root cause failure.ODI will monitor FCA?s analysis to determine if any further field action is warranted.Based on the actions taken by FCA to recall the MY 2007-2010 Jeep Wrangler vehicles and the MY 2008-2016 right hand drive Wrangler vehicles, this investigation is closed.FCA has also agreed to conduct a warranty extension and further evaluation of the MY 2011-2016 Wrangler.At the time of FCA's field data submission in PE 15-025 (September 2015), ODI was aware of a total of 416 MY 2007-2010 and 23 MY 2011-2012 VOQs relevant to this issue.In addition, there have been an additional 90 and 16 VOQs (respectively) received since the recall announcement (i.e., thru May 2016).The reports noted above can be viewed at SaferCar.gov under the reference (ODI) numbers cited on the attached listing.

Air Bags:frontal

On May 10, 2016, Fiat Chrysler America (FCA) submitted a Part 573 Defect Information Report announcing NHTSA recall 16V290 involving 394,258 model year (MY) 2007-2010 Jeep Wrangler vehicles.Under the recall FCA will replace the clockspring and install a steering wheel back cover and steering wheel column shroud.This recall also includes approx. 4,524 MY2007-2010 right hand drive (RHD) Jeep Wrangler vehicles commonly used for rural postal delivery services.In addition 7,180 MY 2011-2016 right hand drive Jeep Wrangler vehicles were also recalled under 16V288, the same remedy repair will be used.Upon review of the 1,942 MY 2007-2010 Jeep Wrangler consumer complaints, 17,195 warranty reports and field returned parts assessment, FCA concluded that a defect exists in the driver side clockspring assembly, a device that both connects (electrically) the driver air bag to the control module and allows rotational movement between the steering wheel and fixed steering column.Clockspring failure may compromise the air bag circuit causing illumination of the air bag warning lamp, and may result in non-deployment of the driver air bag in a frontal crash.FCA identified a contributing factor in that the recalled vehicles may be subjected to off-road dusty environments and/or usage with the vehicle roof top/doors removed thus allowing dust and moisture to enter the clockspring assembly.FCA advised that the MY 2011 and later Wrangler vehicles had an improved steering column cover/shroud that may reduce the amount of dirt/moisture that can enter the clockspring assembly.During the investigation FCA and the Office of Defects Investigation (ODI) also reviewed 193 MY 2011-2012 Jeep Wrangler consumer complaints, 3,918 warranty reports and field returned parts along with reports from other FCA vehicles that use the same clockspring assembly.Based on this review, the rate of repair and the failure mode does not indicate a defect trend at this time in the later MY Wrangler or other FCA vehicles.During the field return parts review, FCA found a significant number of MY 2011-2012 Wrangler returned parts that operated normally, the so called ?no trouble found? or NTF parts where no fault could be identified through bench testing.On June 10, 2016, FCA informed ODI of its intention to conduct a 15-yr, 150k mile extended warranty program due to the NTF issue and the MY 2011 and later vehicles having a somewhat elevated level of warranty replacement.Consumers will be notified of the program in writing.FCA will collect clocksprings replaced under the warranty extension program to further examine and study the root cause failure.ODI will monitor FCA?s analysis to determine if any further field action is warranted.Based on the actions taken by FCA to recall the MY 2007-2010 Jeep Wrangler vehicles and the MY 2008-2016 right hand drive Wrangler vehicles, this investigation is closed.FCA has also agreed to conduct a warranty extension and further evaluation of the MY 2011-2016 Wrangler.At the time of FCA's field data submission in PE 15-025 (September 2015), ODI was aware of a total of 416 MY 2007-2010 and 23 MY 2011-2012 VOQs relevant to this issue.In addition, there have been an additional 90 and 16 VOQs (respectively) received since the recall announcement (i.e., thru May 2016).The reports noted above can be viewed at SaferCar.gov under the reference (ODI) numbers cited on the attached listing.

Air Bags

In it's response to ODI's PE15-025 Information Request letter, FCA identified 1,703 consumer complaints, field reports and legal claims responsive to the subject defect condition on the subject Wrangler vehicles.Six of these reports alleged an air bag non-deployment in a crash in which either the air bag warning light was allegedly on or came on afterward the crash, one of which also alleged injuries as a result of the non-deployment.FCA also provided data on other make, model and model year vehicles using the same clockspring.Additionally FCA provided 16,955 warranty claims related to the replacement of the air bag clockspring wiring assembly.It should be noted that FCA initiated an Extended Warranty Program on the left hand drive MY 2007 Wrangler in late calendar year 2011.6,777 of these claims are from the MY 2007 left hand drive Wrangler.FCA advises that some of the warranty claims involved clockspring failures that would not affect the air bag operation, for example due to noise, cruise control and/or radio operation issues.Many of these claims involved newer model year subject vehicles.FCA also noted that Wrangler's removable roof and door configuration may make it more susceptible to outdoor water/moisture and dust ingress.ODI investigated the right hand drive Wrangler in calender year 2011 for a similar clockspring issue under PE11-019.That investigation lead to NHTSA Safety Recall 11V258 on right hand drive model year (MY) 2008-2012 Wranglers.FCA redesigned the remedy clockspring to improve its durability and environmental protection and revised the design of the steering wheel to column shroud.Base on the data reviewed, this Preliminary Analysis (PE) is being upgraded to an Engineering Analysis (EA).The reports cited above are listed in the public investigative file available at SaferCar.gov under this investigation ID.

Air Bags:frontal

In it's response to ODI's PE15-025 Information Request letter, FCA identified 1,703 consumer complaints, field reports and legal claims responsive to the subject defect condition on the subject Wrangler vehicles.Six of these reports alleged an air bag non-deployment in a crash in which either the air bag warning light was allegedly on or came on afterward the crash, one of which also alleged injuries as a result of the non-deployment.FCA also provided data on other make, model and model year vehicles using the same clockspring.Additionally FCA provided 16,955 warranty claims related to the replacement of the air bag clockspring wiring assembly.It should be noted that FCA initiated an Extended Warranty Program on the left hand drive MY 2007 Wrangler in late calendar year 2011.6,777 of these claims are from the MY 2007 left hand drive Wrangler.FCA advises that some of the warranty claims involved clockspring failures that would not affect the air bag operation, for example due to noise, cruise control and/or radio operation issues.Many of these claims involved newer model year subject vehicles.FCA also noted that Wrangler's removable roof and door configuration may make it more susceptible to outdoor water/moisture and dust ingress.ODI investigated the right hand drive Wrangler in calender year 2011 for a similar clockspring issue under PE11-019.That investigation lead to NHTSA Safety Recall 11V258 on right hand drive model year (MY) 2008-2012 Wranglers.FCA redesigned the remedy clockspring to improve its durability and environmental protection and revised the design of the steering wheel to column shroud.Base on the data reviewed, this Preliminary Analysis (PE) is being upgraded to an Engineering Analysis (EA).The reports cited above are listed in the public investigative file available at SaferCar.gov under this investigation ID.

Engine And Engine Cooling

In a letter dated May 15, 2012, the Chrysler Group LLC (Chrysler) submitted a Defect Information Report to NHTSA identifying a safety defect regarding fires originating between the transmission skid plate and the exhaust catalyst in approximately 65,246 model year (MY) 2010 Jeep Wrangler 4x4 vehicles with automatic transmissions (NHTSA Recall 12V-216).According to Chrysler, changes to the exhaust system for MY 2010 resulted in reduced clearances between the exhaust catalyst and the skid plate.If debris collects in the area of the skid plate and is not removed, there is an increased potential for underbody debris fires.ODI's analysis of skid plate area fires in the MY 2010 Wrangler vehicles with automatic transmissions found that the rate increased significantly from approximately 1.7 fires per 100,000 vehicle years in the MY 2007 through 2009 vehicles with the prior exhaust design to approximately 14.8 fires per 100,000 vehicle years in MY 2010 vehicles, a nearly 800 percent increase.In analysis of both Vehicle Owner Questionnaire (VOQ) data submitted to the Office of Defects Investigation (ODI) and Chrysler's consumer complaint data submitted to ODI, 35 unique reports were identified by Chrysler alleging fire in subject vehicles with origins near the engine compartment or in the underbody area directly beneath and to the rear of the engine compartment.Chrysler's assessments of the 35 reports of fire were categorized by likely causes.Eleven of the fires were determined to be caused by skid plate debris accumulation and 4 additional fires were found to have originated in the area of the skid plate, but debris ignition could not be confirmed.An additional skid plate debris fire was reported to ODI after the recall announcement, bringing the total known fire count to 36, including 12 caused by skid plate debris and 4 originating in the skid plate area from unknown causes.Chrysler identified a design change to the exhaust system in MY 2010 that increased the possibility of debris contact with an exhaust catalyst.Beginning in MY 2011, the skid plate was replaced with a skid bar for weight reduction purposes.The skid bar having a much smaller surface area than the skid plate reduces the potential for debris entrapment.The recall remedy for recall 12V-216 will involve replacement of the skid plate with the skid bar.As background, the MY 2010 subject vehicles are a part of the JK generation of Jeep Wrangler vehicles that began production in MY 2007.Chrysler conducted a prior recall (09V-436) of MY 2007 and 2008 Jeep Wranglers for a defect involving overheated transmission fluid expulsion that could contact the exhaust and cause an engine compartment fire.The recall remedy was to add audible (chime) and visual warnings (hot oil message in the instrument cluster) to alert the driver that the vehicle was being operated with elevated transmission fluid temperatures.Chrysler enhanced the audible warning with a service campaign (J31) for MY 2009 and a portion of the subject MY 2010 vehicles.Transmission fluid expulsion has not been identified as the cause of any of the 36 fire incidents in the subject vehicles. No indications of a common causal pattern were evident in the remaining 20 fire incidents in the subject vehicles.Six (6) of the incidents appear to be related to improper wiring of various added aftermarket equipment, 2 appear to be related to improper oil change, 1 was related to a damaged transfer case, 1 was related to an electrical short circuit and the remaining 10 were of unknown origin.Accordingly, this Preliminary Evaluation is closed.The ODI reports cited above can be reviewed at www-odi.

Power Train:automatic Transmission

In a letter dated May 15, 2012, the Chrysler Group LLC (Chrysler) submitted a Defect Information Report to NHTSA identifying a safety defect regarding fires originating between the transmission skid plate and the exhaust catalyst in approximately 65,246 model year (MY) 2010 Jeep Wrangler 4x4 vehicles with automatic transmissions (NHTSA Recall 12V-216).According to Chrysler, changes to the exhaust system for MY 2010 resulted in reduced clearances between the exhaust catalyst and the skid plate.If debris collects in the area of the skid plate and is not removed, there is an increased potential for underbody debris fires.ODI's analysis of skid plate area fires in the MY 2010 Wrangler vehicles with automatic transmissions found that the rate increased significantly from approximately 1.7 fires per 100,000 vehicle years in the MY 2007 through 2009 vehicles with the prior exhaust design to approximately 14.8 fires per 100,000 vehicle years in MY 2010 vehicles, a nearly 800 percent increase.In analysis of both Vehicle Owner Questionnaire (VOQ) data submitted to the Office of Defects Investigation (ODI) and Chrysler's consumer complaint data submitted to ODI, 35 unique reports were identified by Chrysler alleging fire in subject vehicles with origins near the engine compartment or in the underbody area directly beneath and to the rear of the engine compartment.Chrysler's assessments of the 35 reports of fire were categorized by likely causes.Eleven of the fires were determined to be caused by skid plate debris accumulation and 4 additional fires were found to have originated in the area of the skid plate, but debris ignition could not be confirmed.An additional skid plate debris fire was reported to ODI after the recall announcement, bringing the total known fire count to 36, including 12 caused by skid plate debris and 4 originating in the skid plate area from unknown causes.Chrysler identified a design change to the exhaust system in MY 2010 that increased the possibility of debris contact with an exhaust catalyst.Beginning in MY 2011, the skid plate was replaced with a skid bar for weight reduction purposes.The skid bar having a much smaller surface area than the skid plate reduces the potential for debris entrapment.The recall remedy for recall 12V-216 will involve replacement of the skid plate with the skid bar.As background, the MY 2010 subject vehicles are a part of the JK generation of Jeep Wrangler vehicles that began production in MY 2007.Chrysler conducted a prior recall (09V-436) of MY 2007 and 2008 Jeep Wranglers for a defect involving overheated transmission fluid expulsion that could contact the exhaust and cause an engine compartment fire.The recall remedy was to add audible (chime) and visual warnings (hot oil message in the instrument cluster) to alert the driver that the vehicle was being operated with elevated transmission fluid temperatures.Chrysler enhanced the audible warning with a service campaign (J31) for MY 2009 and a portion of the subject MY 2010 vehicles.Transmission fluid expulsion has not been identified as the cause of any of the 36 fire incidents in the subject vehicles. No indications of a common causal pattern were evident in the remaining 20 fire incidents in the subject vehicles.Six (6) of the incidents appear to be related to improper wiring of various added aftermarket equipment, 2 appear to be related to improper oil change, 1 was related to a damaged transfer case, 1 was related to an electrical short circuit and the remaining 10 were of unknown origin.Accordingly, this Preliminary Evaluation is closed.The ODI reports cited above can be reviewed at www-odi.