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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

Engine complaints

27 reports
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Mileage unknown · Jul 18, 2024
Engine

Recall related to crankshaft and engine wear/malfunction is not addressed in a timely manner from recall date. My local dealership has a waitlist of 500+ cars to address and they don’t even have enough parts to do so. I do not feel confident that technicians will inspect thoroughly and that leaves my family and I at risk while d…

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Recall related to crankshaft and engine wear/malfunction is not addressed in a timely manner from recall date. My local dealership has a waitlist of 500+ cars to address and they don’t even have enough parts to do so. I do not feel confident that technicians will inspect thoroughly and that leaves my family and I at risk while driving this car with a considerable issue.

NHTSA ODI #11603276

Mileage unknown · Mar 4, 2024
Engine

My rod bearing seized, and I had to replace the entire engine. Per the remedy, I should be reimbursed the costs for the replacement due to the engine rod being blown. I have submitted to Acura, and they keep telling me to bring the vehicle in for inspection, but the engine has already been replaced. I have attached the recal…

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My rod bearing seized, and I had to replace the entire engine. Per the remedy, I should be reimbursed the costs for the replacement due to the engine rod being blown. I have submitted to Acura, and they keep telling me to bring the vehicle in for inspection, but the engine has already been replaced. I have attached the recall notification along with the original deposit for the repair and then the final cost. I submitted it to Acura on 01/16 and was told that the issue has not been resolved since the parts are not available. We have replaced the engine and are seeking reimbursement, not the parts being replaced.

NHTSA ODI #11575396

Mileage unknown · Mar 1, 2024
Engine

After stop light turned from red to green, I began to accelerate through the intersection, when I felt a strong resistance to me trying to accelerate. Second, all the lights on the dashboard lit up and I proceeded to pull off onto the side of the road. I turned the car off, then on again to see if something just needed to be res…

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After stop light turned from red to green, I began to accelerate through the intersection, when I felt a strong resistance to me trying to accelerate. Second, all the lights on the dashboard lit up and I proceeded to pull off onto the side of the road. I turned the car off, then on again to see if something just needed to be reset or for a rest. Same thing happened and I was unable to continue to drive my car to work. I had my car towed to a nearby automotive shop and they told me the transmission valve needed to be replaced and possibly the entire transmission. They recommended I have it towed to Acura dealership - which I did. Elk Grove Acura's diagnostic was the same. They said that a new valve may not be the fix and I may need the entire transmission to be replaced. They quoted me at $3900 for valve and $9k for entire transmission. I still owe $9k on the vehicle. I am now in a very sticky situation. I don't believe the transmission should have gone out after 104,000 miles. My boyfriend's parents told me they had the same issue with their Acura. I'm wondering if it's a common issue with Acuras.

NHTSA ODI #11574916

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

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 · 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 · Feb 4, 2022
EngineLane DepartureVehicle Speed ControlCrash

Engine light would come on if I drove 65 MPH check engine emission system problem I would try drive press on gas peddle & car would slow down I almost got rear ended by 18 wheeler semi truck

NHTSA ODI #11450365

Mileage unknown · Oct 14, 2021
Engine

driving 65-70 MPH on highway the car would feel sluggish like it needs power then I can hear the engine roar louder then i get alerts on my dash that my brakes are not working my blind spot or lane keep assist or any safety features in my car is not activated working properly is what my car tells me i Almost lost my life twice t…

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driving 65-70 MPH on highway the car would feel sluggish like it needs power then I can hear the engine roar louder then i get alerts on my dash that my brakes are not working my blind spot or lane keep assist or any safety features in my car is not activated working properly is what my car tells me i Almost lost my life twice those two times I almost got rear ended my semi truck on highway going 65+ on highway first time was March 1 2020 when i was driving from massachusetts to New York felt like my car was stalling I would try give it more gas but it felt real slow sluggish second time was recent October 2 2021 i was heading to casino in Connecticut on my way there dash says same problems as before this time the car wouldn’t allow me to go past 60 it kept me in 45-55 mph on the high I was scared because speed limit was 65 here comes semi truck lucky I was able to pull to side of the highway in time but I was so scared cause I know how fast that truck was coming my car shut off as soon as I got on the side of the road all I felt was my car shake from speed of the truck that literally passed me my car was off on side of highway was pitch black all I was hoping for was truck not hiting me because he was in the same lane as me but while I was quick in reacting I put on my hazard lights on before my car shut off when I pulled along side of the road I wanted to plan a trip for me & my girlfriend im scared to take my car because today on my home from work my car did it again coming home from work driving 70 mph 10/14/21 I don’t know what to do so scared feel like nobody wants to recall my car I keep hearing story’s online with people who got the same car as me & to no avail find the solution to their car geting repaired also I felt like dealership did something to my car transmission because i brought in my car for brakes Service during repair they called me state we messed up my transmission which was not related to why I brought it in for fix it under warranty

NHTSA ODI #11436855

Mileage unknown · Jun 30, 2021
Engine

I was driving at 45 miles per hour and out of nowhere the car stopped accelerating and turned on all the dash lights on many warnings

NHTSA ODI #11423019

Mileage unknown · Jun 1, 2021
EngineFuel/propulsion System

For just shy of a year, We've been experiencing problems with our 2016 TLX misfiring and stalling. Fuel pressure has been tested and it's shown to dramatically drop while under load. It behaves like the problem identified with the recall NHTSA 19V060000 for the V6 of the same year/model. It's a very disturbing event when it happ…

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For just shy of a year, We've been experiencing problems with our 2016 TLX misfiring and stalling. Fuel pressure has been tested and it's shown to dramatically drop while under load. It behaves like the problem identified with the recall NHTSA 19V060000 for the V6 of the same year/model. It's a very disturbing event when it happens and it prevents us from driving the car longer than 30-45 minutes - particularly for adequately and safely handling highway driving. At the worst, the car goes into limp mode/stalls out.

NHTSA ODI #11419246

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.