2016 Honda Pilot

The Office of Defects Investigation (ODI) has received 414 reports of connecting rod bearing failures in the 3.5L V6 engine used in the following vehicles: Model Years (MY) 2018-2020 Acura TLX, MY2016-2020 Acura MDX, MY2016-2020 Honda Pilot, MY2018-2020 Honda Odyssey, and MY2017-2019 Honda Ridgeline.  The subject engine failures were analyzed as part of a Recall Query (RQ24013).  It was determined that these engine failures are outside the scope of Honda Recall 23V-751. Further, evidence gathered in conjunction with RQ24013 does not suggest this failure is caused by the same crankshaft manufacturing defect that is addressed by Honda in Recall 23V-751.  Based on analysis of data from RQ24013, NHTSA has closed that investigation. The significant number of reports of engine failure in vehicles outside the scope of RQ24013 presents a potential safety risk that warrants further investigation.  ODI is opening this Preliminary Evaluation (PE) to further evaluate the scope and severity of the potential problem and to fully assess the potential safety-related issues.  To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

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.

On November 8, 2024, the Office of Defects Investigation (ODI) opened Recall Query RQ24013 to assess the scope of Honda recall 23V-751 after receiving complaints that alleged connecting rod bearing failures in vehicles that were not within the scope of recall 23V-751. In November 2023, Honda recalled 248,999 various Model Year (MY)2016–2020 Honda and Acura vehicles equipped with the 3.5L V6 engine. Honda recalled these vehicles due to a crankshaft manufacturing defect that caused premature connecting rod bearing wear and engine seizure. While the out-of-scope failures involved in these complaints appear to have a very similar failure mechanism as the recalled engines, a thorough analysis of all available data from Honda has not indicated that the same manufacturing defect exists in the out-of-scope engines as the engines recalled by 23V-751. Based on this analysis ODI has determined that Honda has properly defined the scope of recall 23V-751. Consequently, ODI will close this RQ investigation.  NHTSA will continue to investigate these complaints of engine failure as part of a new Preliminary Evaluation Investigation (PE25008). The Agency reserves the right to take additional action if warranted by new circumstances.

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 Preliminary Evaluation is being upgraded to an Engineering Analysis, EA25004, to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope for the Engineering Analysis 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 campaigns. To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

My 2016 Honda Pilot has suffered catastrophic engine failure due to an apparent connecting rod bearing failure, identical to the defect described in NHTSA Recall 23V-751. During driving on the interstate the engine began knocking, made a loud banging sound, abruptly seized while driving which caused a sudden loss of motive power on the roadway, which created an immediate traffic hazard and safety risk. My VIN was checked and is currently excluded from the existing recall when checking through Honda. I am filing a complaint to urge investigation to expand the scope of the recall to cover my vehicle since it seems to exhibit the exact same rod defect currently under this federal investigation.

NHTSA ID

11776311

Incident

Oct 19, 2026

The contact owns a 2016 Honda Pilot. The contact stated that while driving 35 MPH, an abnormal knocking sound emanated from the engine. The vehicle was taken to the dealer, where diagnostic testing determined that the connecting rod bearings failed. The contact associated the failure with NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was notified of the failure by telephone. The failure mileage was approximately 105,000.

NHTSA ID

11776169

Incident

Sep 20, 2026

Mileage

105,000 mi

The manufacturer’s defective fuel delivery system (faulty fuel injectors covered under Honda TSB #19-056) causes severe engine cylinder misfires, dropping the vehicle into an immediate, unpredictable, and sluggish 'limp mode' while driving at highway speeds. This sudden loss of power and acceleration creates a severe traffic hazard, preventing the vehicle from keeping pace with traffic or safely merging. The primary fueling malfunction has also led to cascading damage, sequentially melting and destroying both catalytic converters and prematurely destroying brand-new spark plugs in under 5,300 miles due to raw fuel dumping into the exhaust stream.

NHTSA ID

11775893

Incident

Nov 3, 2026

Vehicle experiences a severe 3-to-4 second extended engine crank before starting due to fuel pressure loss. Priming the low-pressure fuel pump manually bypasses the issue, indicating a check-valve bleed-down failure. It is continuously worsening over time. This is identical to the failure mode of the active low-pressure fuel pump safety recalls affecting 2017-2020 Honda models, but my 2016 model is currently excluded.

NHTSA ID

11775538

Incident

Sep 1, 2026

I was stopped at a traffic light just off a highway exit ramp, with my vehicle in drive. When the light changed and I attempted to accelerate, the vehicle would not move forward. I immediately shut off the engine. Because I was stopped in an active traffic lane near a highway ramp, I became concerned for my safety and restarted the vehicle in an attempt to move out of traffic. Upon restarting the engine, I heard a knocking noise that had not been present previously. I was able to move the vehicle approximately five feet to a safe position before shutting it off again.I did not attempt to drive the vehicle any further because I was concerned about causing additional damage. The entire incident unfolded within seconds. This was a single, sudden failure rather than a recurring issue. The knocking occurred only during the period leading up to the vehicle becoming inoperable. This was not an ongoing issue that I had been experiencing for months. Car would not accelerate, I began experiencing a knocking noise from the engine. The vehicle subsequently stopped running.

NHTSA ID

11775392

Incident

Oct 3, 2026

The auto idle malfunctioned; the vehicle did not restart when the break was released and/or moving steering wheel. It was in the middle of a busy intersection so that is definitely putting my safety as well as my daughter's and others safety at risk. It took at least a minute to restart the vehicle, by putting the gear in park and restarting the vehicle (which took several attempts). Those steps were produced on the dashboard when it didn't restart after being idle. It has happened several times over the last four months. I've taken it to my local car shop, but they are not able to find anything wrong; however, the manager of the car shop did experience the malfunction when driving on 10/10/2026. It was suggested to report the malfunction as an incident.

NHTSA ID

11774936

Incident

Oct 10, 2026

I have a series of dashboard warning lights that have went off due to failure of this camera-based (LKAS) unit. They are labeled as: 1) Lane Keeping Assist Problem 2) Auto Matic Cruise Control Problem 3) Traction Control Problem 4) ABS - braking system failure. These issues, IMO, are enough to suggest a recall is warranted. Please advice. I can provide photos of these warnings if necessary. Thanks [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11774395

Incident

Jun 15, 2023

Connecting rod spun a bearing/ rod knock Verified le customer's concern regarding an abnormal engine knockır oise. Conducted a diagnostic inspection and confirmed pronounced metallic knocking noise originating from the ower engine assembly. Used a mechanic's stethoscope tr isolate the noise to the crankshaft/connecting rod area technician verified a catastrophic lower-end engine failure. Specifically, the diagnostic notes state: "Connecting rod spun a bearing / rod knock Verified" "Pronounced metallic knocking noise originating from the lower engine assembly" "Testing indicated that the knocking noise was most prominent at cylinder #2, consistent with excessive connecting rod bearing clearance and a spun connecting rod bearing." Furthermore, the computer scan sheet shows zero codes for low oil pressure, engine overheating, or vehicle neglect. The temporary misfire codes listed occurred solely because the technician intentionally disconnected individual ignition coils to isolate the mechanical knocking sound. This precise diagnosis—a spun connecting rod bearing at cylinder #2 due to improper clearance—is the textbook definition of the inherent manufacturing defect that triggered the major NHTSA Action regarding Honda 3.5L V6 engines. Because my vehicle was manufactured at the Lincoln, Alabama plant and has been maintained perfectly by Honda its entire life, this failure is undeniably due to a factory structural defect rather than normal wear and tear or owner oversight.

NHTSA ID

11774283

Incident

Oct 20, 2026

Service Bulletin - Under certain circumstances, after coming to a stop and the auto idle stop feature engages, the vehicle may not automatically restart. In other circumstances, vehicles may experience a slow crank or fail to start under hot ambient temperature conditions.

Dealer Message - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. In other circumstances, vehicles may experience a slow crank or fail to start under hot ambient temperature conditions. The customer should be able to restart the vehicle by selecting Park and pushing the ENGINE START/STOP button.

Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop, the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the customer can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button.

Service Bulletin - The AWD warning light is on potentially due to water intrusion into the rear differential pump motor connector area that corrodes the terminals.

Service Bulletin - Drivers may experience a chirping sound coming from the engine area with the engine warmed up due to the high pressure fuel pump is making a chirp.

Service Bulletin - MIL flashes and vehicle will not accelerate, low power. After cycling the ignition, the symptom does not return with no stored DTCs. This issue is more common in regions with cold weather (specifically near or below freezing temperatures). Usually after a long drive (around 2 hours) and accelerating while cornering.