2018 Honda Odyssey

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 October 28, 2025, the Office of Defects Investigations (ODI) opened PE25018 to investigate complaints of inadvertent deployment of the side curtain and/or side thorax air bags. These complaints concern model year (MY) 2018-2022 Honda Odyssey vehicles manufactured by American Honda Motor Co. (Honda). Honda issued recall 26V227 on April 9, 2026, to address concerns of inadvertent side air bag deployment. In the recall filing, the company stated that “[a]s of April 2, 2026, Honda has had 130 warranty claims, 25 reports of an injury, and no reports of death related to this issue from January 24, 2017 – April 2, 2026.” Honda states that the Supplemental Restraint System (SRS) Electronic Control Unit (ECU) contains incorrect deployment parameters for the side thorax and side curtain air bags, which may cause inadvertent deployment when the vehicle encounters strong road impacts, such as driving over potholes, speed bumps, or road debris. Honda stated that the SRS control logic for the second and third rows of seating contained an insufficient deployment threshold margin, allowing signal inputs to be misinterpreted as side impacts and causing inadvertent deployment of the side thorax and side curtain air bags. Recall 26V227 states that dealers will reprogram or replace the SRS ECU with improved air bag deployment parameters. Consumers received notice of this recall in late May 2026. In view of the recall being conducted by Honda, ODI is closing this Preliminary Evaluation (PE). The Agency reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in the Closing 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.

Water intrusion from cracks on the seam sealant on the roof, rear of the drivers side make the 3rd row seatbelt get wet and the tailgate lock to fail. Tailgate button is not operational and tailgate locks/unlocks randomly after rains.

NHTSA ID

11775823

Incident

Sep 10, 2025

The adaptive cruise control and lane assist stopped working on my vehicle. Two alerts showed up on my dashboard. These features are important safety features with children in the car and the warnings are distracting and pose a threat to other safety features of the vehicle.

NHTSA ID

11775799

Incident

Nov 4, 2026

My vehicle was previously serviced under NHTSA Safety Recall 23V-431 for the MOST bus/FAKRA fiber-optic connector defect. The recall remedy has completely failed. The entire infotainment network blinks on and off, which when off completely disables my rearview safety backup camera and dashboard navigation. The dealership is demanding $8000 to replace the system and Honda USA Customer Service has refused to help, stating it is no longer covered. The vehicle is difficult to operate without the federal safety backup camera and the infotainment system disabled. The initial recall repair did not permanently resolve the safety hazard. My wife and I are both [XXX] and bought this particular vehicle for all the additional safety features that now are unreliable. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11775138

Incident

Aug 27, 2026

I was driving and my check engine. Light came on, the car was slow to accelerate. I pulled over and I had it towed to a honda dealership, the closest one. They diagnosed it with needing a transmission replacement and replaced a transmission. Then, after the transmission was replaced, suddenly there was a knock in the engine. The dealership sent me a video with them. Revving, the engine very strongly, and I couldn't really discern any knocking noise, but the engine revving was excessive. Then, I asked for an additional video to try and hear what they were hearing. They sent me another video where there was a clear knock. This did not get disclosed to me at all, because they said it was hard to get it into, because it wasn't really accelerating, they couldn't barely get it into the bay after the cart was towed to the facility. If the cart was making a knocking noise at that moment, it should have been noted initially, but it was not noted until after the transmission was replaced. I never had a knocking sound prior to having my car. Delivered to this dealership.

NHTSA ID

11775080

Incident

Sep 5, 2026

My 2018 Honda Odyssey suffered a catastrophic engine failure while I was driving to work on the morning of XXX. I had my vehicle towed to Safford Brown's Honda in [XXX]. According to my service rep at the Honda Dealership, the failure was due to the connecting rod bearings. After some research, I found that the V6 Engines for Honda had a recall on them in 2023, Recall No. 23V751000. I called corporate Honda, and spoke to a rep ([XXX]) there, she said that my VIN was excluded from the recall, and that the recall only affect those engines built at a certain factory. Further research found that NHTSA opened a broader 1.4-million vehicle probe because engines built outside that original plant and timeline are suffering identical catastrophic rod bearing failures, like what I just experienced. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11774855

Incident

Oct 29, 2026

The motor on the passenger side sliding door on our 2018 Honda Odyssey failed. The door could not be opened electrically - or Mechanically from inside or outside the vehicle. We had it repaired at the dealer at a cost of ~$2,000. The sliding door was INOPERABLE when the motor failed. If the car was in an accident the door could not be opened by second or third row passengers or first responders to enable evacuation from the vehicle. This is EXTREMELY DANGEROUS! The problem was confirmed by the dealer. The sliding door can’t be opened when the motor fails. The dealer also stated that Honda had an active engineering assessment in process and that a recall might happen - so hold on to our receipt.

NHTSA ID

11774230

Incident

Oct 14, 2026

The contact owns a 2018 Honda Odyssey. The contact stated that while driving 60 MPH, the vehicle stalled and lost motive power with several warning lights illuminated. The contact pulled over to the side of the road, shifted the vehicle into park(P), and there was smoke coming from the engine. The vehicle failed to restart after the failure. The vehicle was towed to a service center, where an engine failure was confirmed, and the contact was referred to the dealer for assistance. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine and front axle had failed and needed to be replaced. The manufacturer was made aware of the failure by telephone. The failure mileage was approximately 117,000.

NHTSA ID

11773824

Incident

Oct 26, 2026

Mileage

117,000 mi

All my warning light come on every time I turn on the van. Been going on for several months. Was told the issue will get fixed if the front camera under rear view mirror get replaced. Feel like this needs to be recalled to get fixed, especially finding out Honda already knew there was a issue.

NHTSA ID

11773454

Incident

May 1, 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.

Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, your vehicle may not automatically restart.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2020 Accords, 2016-2020 Civics, 2017-2020 CR-Vs, & 2018-2020 Odysseys that have been diagnosed to be in need of the low-pressure fuel pump, fuel strainer, fuel meter or fuel tank replacement.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2020 Accords, 2016-2020 Civics, 2017-2020 CR-Vs, & 2018-2020 Odysseys that have been diagnosed to be in need of the low-pressure fuel pump, fuel strainer, fuel meter or fuel tank replacement. If you have a vehicle that match the qualifiers listed below, AHM requests to have the photos of the lock ring & the low-pressure fuel pump flange taken & sent to TIS (click HERE for example photos).

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.