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2016 Acura Tlx

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2016 Acura Tlx do not stand out strongly from the model-year median of 65.

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When problems were reported

Mileage at the reported incident

57 reports with mileage · 53 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.

  • Engine. Review the 27 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

5 crash reports0 fire reports6 injury reports

What owners actually said

110 reports
93,000 miles · Dec 21, 2023
Engine And Engine Cooling

The contact owns a 2016 Acura TLX. The contact stated that while driving at various speeds, an abnormal clicking sound was coming from the vehicle. There was no warning light illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the connecting rod bearing was defective. The contact was i…

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The contact owns a 2016 Acura TLX. The contact stated that while driving at various speeds, an abnormal clicking sound was coming from the vehicle. There was no warning light illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the connecting rod bearing was defective. The contact was instructed to no longer drive the vehicle. Upon investigation, the contact discovered that the vehicle was included in NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling) which was linked to the failure. The local dealer was made aware of the issue and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 93,000. VIN tool confirms parts not available.

NHTSA ODI #11561306

100,000 miles · Dec 4, 2023
Fuel System, OtherCrash

The contact owns a 2016 Acura TLX. The contact stated that while driving at various speeds, the vehicle would jerk without warning. Upon investigation, the contact discovered NHTSA Campaign Number: 19V060000(Fuel System, Other) which the contact linked to the vehicle failure. The dealer was notified of the failure and an appoint…

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The contact owns a 2016 Acura TLX. The contact stated that while driving at various speeds, the vehicle would jerk without warning. Upon investigation, the contact discovered NHTSA Campaign Number: 19V060000(Fuel System, Other) which the contact linked to the vehicle failure. The dealer was notified of the failure and an appointment was made for service. Before the vehicle was serviced, the contact stated that the vehicle stalled while making a left turn; as a result, another vehicle into the rear passenger side door. The air bags deployed upon impact, and no injuries were reported. A police report was filed. The vehicle was initially towed to an independent mechanic and was later towed to an Acura collision center where it remained in their possession. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 100,000.

NHTSA ODI #11558312

119,000 miles · Nov 24, 2023
Engine

The contact owns a 2016 Acura TLX. The contact received notification of NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that whi…

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The contact owns a 2016 Acura TLX. The contact received notification of NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at an undisclosed speed, the contact heard an abnormal sound and the engine seized. The vehicle was towed to the dealer where it was diagnosed with a failed connection rod bearing. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact was informed that parts were not yet available. The dealer was made aware of the failure but confirmed that parts were not yet available. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 119,000.

NHTSA ODI #11556649

Mileage unknown · Oct 16, 2023
Tires

Tire size 225/55R17. - Sidewall separation on the inside portion of two tires (unable to identify from looking at tires on vehicle, this could go unnoticed by the driver). No tires were removed from Acura. I do have photos of this safety hazard. - Tires could have blown out while driving and a crash occurring injuring driver o…

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Tire size 225/55R17. - Sidewall separation on the inside portion of two tires (unable to identify from looking at tires on vehicle, this could go unnoticed by the driver). No tires were removed from Acura. I do have photos of this safety hazard. - Tires could have blown out while driving and a crash occurring injuring driver or other vehicles on the road. After seeing the tire separation they technicians advised not to drive car vehicle safety hazard. - Unknown if problem was able to be reproduced. - Tire was not inspected by any representative only Acura dealership technicians. - Yes, there were symptoms, when driving at low speeds under 20 mph a squeaky noise was heard, as speed increased the noise was more frequent.

NHTSA ODI #11550186

145,690 miles · Aug 3, 2023
Tires

The contact owns a 2016 Acura TLX equipped with Goodyear Tires, Tire Line: Eagle LS2, Tire Size: 225/55/R17, DOT Number: (N/A). The contact stated while driving 50 MPH, the low tire pressure warning light illuminated. The contact was able to continue driving to her destination. The contact took the vehicle to the local dealer, a…

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The contact owns a 2016 Acura TLX equipped with Goodyear Tires, Tire Line: Eagle LS2, Tire Size: 225/55/R17, DOT Number: (N/A). The contact stated while driving 50 MPH, the low tire pressure warning light illuminated. The contact was able to continue driving to her destination. The contact took the vehicle to the local dealer, and the contact was informed that the tire was punctured. Additionally, all four tires were dry-rotted and needed to be replaced. The vehicle was not repaired. The tire manufacturer had been informed of the failure. The failure mileage was approximately 145,690.

NHTSA ODI #11536324

Mileage unknown · Apr 5, 2023
Fuel/propulsion SystemUnknown Or Other

My fuel pump I think is messed up. I had my dad and mechanic look at it. They say it is the fuel pump. The mechanic was in the car when it kept jolting every time I pressed the gas. I could have hit someone in front of me! It keeps doing if. There is a fuel pump recall for these cars, but they don’t want to include my car even t…

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My fuel pump I think is messed up. I had my dad and mechanic look at it. They say it is the fuel pump. The mechanic was in the car when it kept jolting every time I pressed the gas. I could have hit someone in front of me! It keeps doing if. There is a fuel pump recall for these cars, but they don’t want to include my car even though it is. I’m highly frustrated. Please help! I put a date when my mechanics told me something’s wrong, but it started way before that.

NHTSA ODI #11515683

145,000 miles · Jan 18, 2023
Engine

The contact called on behalf of his granddaughter who owns a 2016 Acura TLX. The contact stated while the vehicle was being driven at highway speeds, the vehicle inadvertently decelerated to 10 MPH, and stalled without warning. The driver was able to pull off the roadway and restart the vehicle after several attempts; however, t…

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The contact called on behalf of his granddaughter who owns a 2016 Acura TLX. The contact stated while the vehicle was being driven at highway speeds, the vehicle inadvertently decelerated to 10 MPH, and stalled without warning. The driver was able to pull off the roadway and restart the vehicle after several attempts; however, the vehicle failed to exceed 10 MPH. The vehicle was also running rough. The contact stated that on three occasions, after the failure, the vehicle failed to start and was towed. The contact stated that the check engine warning light was illuminated. The failure recurred five times. The vehicle was taken to the dealer to be diagnosed. The mechanic determined that the engine was misfiring. The spark plugs and ignition wires were replaced; however, the failure persisted. The vehicle was returned to the dealer who diagnosed that the fuel injectors had failed and needed to be replaced. The vehicle was in the process of being repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 145,000.

NHTSA ODI #11502401

Mileage unknown · Nov 8, 2022
Electrical System

The defect with stalling after auto start continues even after Acura applied a software update. They refuse to complete second part of recall including starter replacement and valve adjustment as indicated on their attached letter. THIS NEGLIGENCE IS A HIGH RISK OF PERSONAL INJURY TO MY FAMILY AND I.

NHTSA ODI #11492769

Mileage unknown · Jul 26, 2022
EngineFuel/propulsion SystemPower Train

My Catalac converter needs to be replace I took it in backin March because dash lights were on . It was covered under warranty barley made it the first time I took it into Acura they failed to look if it was covered for me . After a month of stress and research it was so I took it back to Acura with the paperwork and spoke to t…

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My Catalac converter needs to be replace I took it in backin March because dash lights were on . It was covered under warranty barley made it the first time I took it into Acura they failed to look if it was covered for me . After a month of stress and research it was so I took it back to Acura with the paperwork and spoke to the manager who checked it 2 times and said it wasn’t I handed him the paperwork n he was able to find it he ordered the part and said he’d give me my diagnosis fee back when the part comes in . I’ve been waiting 6 months for it now. Well now my engine block needs to be replaced wich is a bigger issue . And im barely over 80,000 miles the tech said everything looked up to date on car , there’s no reasonable explanation on Why this happen. And again the part I need is also on back order . Im carless and just over warranty timeframes I’ve only had the car about a year wth a car payment still . This is very frustrating

NHTSA ODI #11475845

Mileage unknown · Jun 18, 2022
Electrical System

Idle Stop does not restart car & is difficult to restart since car remains in Drive after restart fails. A recall notice was issued, but the software update is not available at any dealers as of June 18, 2022. Product Update required for PGM-FI Software.

NHTSA ODI #11469900

Official recalls

3

23V858000 · Fuel System, Gasoline:delivery:fuel Pump

Dec 18, 2023

Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda Accord Hybrid, Pilot, Acura NSX vehicles. The fuel pump inside the fuel tank may fail.

Consequence & remedy

Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are KGC and KGD. This recall is an expansion of NHTSA recall numbers 21V-215 and 20V-314.

23V751000 · Engine And Engine Cooling:engine:hard Parts Internal/mechanical

Nov 13, 2023

Honda (American Honda Motor Co.) is recalling certain 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2016 and 2018-2019 Pilot, 2017 and 2019 Ridgeline, and 2018-2019 Odyssey vehicles. Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine.

Consequence & remedy

Consequence: A damaged engine may run improperly or stall while driving, increasing the risk of a fire, crash, or injury.

Remedy: Dealers will inspect and repair, or replace the engine as necessary, free of charge. Owner letters were mailed March 28, 2024. 2016-2017 Acura MDX owner letters were mailed November 1, 2024. 2016-2020 Acura MDX owner letters are expected to be mailed in mid-December 2024. Honda began mailing owner notification letters as of March 18, 2024. 2015-2016 Acura owner letters are expected to be mailed mid-December 2024, 2018 Acura TLX owner letters are expected to be mailed the end of March/early April 2024, 2019 Acura TLX owner letters are expected to be mailed mid-May 2024, 2020 Acura TLX owner letters are expected to be mailed mid-June 2024, and 2016-2020 Acura MDX owner letters are expected to be mailed January 27, 2025. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls are XG1 and GG0.

19V060000 · Fuel System, Other:delivery:fuel Pump

Jan 29, 2019

Honda (American Honda Motor Co.) is recalling certain 2016-2018 Acura MDX, 2015-2019 Acura TLX and 2015-2017 Honda Accord vehicles, equipped with a 3.5L V6 engine. Particulates in fuel may adhere to the internal components of the fuel pump, reducing its performance.

Consequence & remedy

Consequence: Reduced fuel pump performance can result in an engine stall, increasing the risk of crash.

Remedy: Honda will notify owners, and dealers will update the fuel injection engine control unit (FI-ECU) software and, if necessary, replace the fuel pump, free of charge. The recall began March 25, 2019. Owners may contact customer service at 1-888-234-2138. Acura's recall number for this recall is P3W. Honda's recall number for this recall is N3X.

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

2

EA25004 · No Restart After Auto Start/stop Engages

Opened Mar 26, 2025 · No close date supplied

Status: open (inferred from source dates) · Engine And Engine Cooling:engine; Engine And Engine Cooling:engine:crank/camshaft Position Sensor; Engine And Engine Cooling:engine:engine Control Module (ecu/ecm):software; Engine And Engine Cooling:engine:hard Parts Internal/mechanical

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Additional source detail variants (4)

Engine And Engine Cooling:engine:crank/camshaft Position Sensor

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine:engine Control Module (ecu/ecm):software

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine:hard Parts Internal/mechanical

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

EA19001 · Electrical Overstress

Opened Apr 19, 2019 · Closed Sep 19, 2024

Status: closed (inferred from source dates) · Air Bags: Air Bag/restraint Control Module

The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect.  During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped with an airbag control unit (ACU) for the supplemental restraint system (SRS) Electronic Control Unit (ECU) manufactured by ZF-TRW.  The ECU receives signals from crash sensors mounted in the vehicle and deploys the vehicle air bags and seat belt pretensioners in accordance with manufacturer design specifications.  The ECU in the subject vehicles contains a model DS84 application-specific integrated circuit (ASIC) which controls the communication of the crash sensor signal, firing commands (i.e., when to deploy the airbag(s) and/or pretensioners), and fault information (e.g., diagnostic trouble codes). In September 2016, FCA announced recall 16V-668 for certain model year (MY) 2010 to 2014 Chrysler, Dodge and Jeep products manufactured with the subject ZF-TRW ACU.  In this recall, FCA discussed an EOS condition that resulted in a failure of the subject DS84 ASIC, which caused air bag non-deployment.  FCA noted that the defect condition had only been observed in vehicles equipped with sensor harnessing routed across the front of the vehicle.  Other FCA vehicles that also used the subject ACU, but were not equipped with cross-car harnessing, had not experienced EOS failures, despite similar time in service. During the course of this investigation, ODI sent two separate Information Request (IR) letters to six vehicle manufactures (including FCA, Hyundai, Honda, Kia, Mitsubishi, and Toyota) and one IR letter to ZF-TRW.  These IR letters resulted in ODI receiving comprehensive data from these manufacturers and suppliers. Studies of this data found that the DS84 ASIC does not have sufficient protection against negative electrical transients or electrical overstress (“EOS”) that can be generated in certain severe crashes.  An electrical transient occurs when the electrical power supplied to a circuit changes momentarily over a short duration of time.   In these severe crash cases, the crash sensors and other powered wiring can be damaged and short circuited so as to create a negative electrical transient of sufficient intensity and duration (that are outside the vehicle manufacturer's specification) to damage the ASIC before the restraint device deployment signal is received by the SRS ECU.  This damaged signal can lead to incomplete or nondeployment of the air bags and/or pretensioners.  Airbag non-deployment and/or lack of pretensioner operation can increase the risk or severity of injury in a crash.A total of 8 fatalities and 14 injuries were associated with known EOS events. The common element in all investigated manufacturers vehicles is the SRS ECU containing a DS84 ASIC manufactured by ZF-TRW.  The risk associated with the ASIC is equally shared among all OEMS involved in the investigation.  The actual real-world risk can be mitigated by other factors which were assessed by ODI during this investigation. The first mitigating factor involves protections built into the ACU design which protect the DS84 ASIC from damage.  There are multiple strategies and levels of protection employed by different OEMs that provide effective EOS mitigation.  The two most common strategies at the ACU level are circuit protection diodes on the remote senor signal lines, and current limiting resistors that protect critical components. The second mitigating factor is found at the vehicle level and involves the location and routing of the wires leading from the crash sensors to the SRS ECU.  If the wires are well protected in a crash and are not routed with other power wires carrying large currents, the risk for an EOS event is significantly reduced or eliminated. These design specific factors combine to produce a spectrum of risk for the vehicles equipped with ACUs using the DS84 ASIC.  Given the many of years of field exposure, it is possible to divide the subject population into two groups; vehicles which have experienced EOS events, and vehicles which have not experienced EOS field events. Four of the six OEMs involved in this investigation have experienced EOS field events on at least one of their models equipped with a DS84 ASIC.  All vehicle models (including the Toyota models identified in the Failure Report Summary of the opening resume for this investigation) with field events have been recalled.  In an abundance of caution, ODI kept this investigation open five years to monitor field performance and did not identify any field events on vehicles not included in existing safety recalls. Given the spectrum of risk identified in this investigation and that all vehicles with a demonstrated unreasonable risk have been recalled, ODI is closing this investigation. ODI is closing this investigation with the following manufacturer safety recalls: 16V-668, 18E-043, 18V-137, 18V-363, and 20V-024.  With the recall actions taken by the subject vehicle and equipment manufacturers, this investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exists on other model or model year vehicles outside of the recall scopes. The agency reserves the right to take further action if warranted by the circumstances.