2020 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.

The contact owns a 2020 Honda Pilot. The contact stated that the radio made an abnormal crackling and popping sound, and the instrument cluster flickered with the Collision Mitigation Braking System (CMBS), and the cruise control became inoperable while driving. The vehicle was taken to a dealer, where the contact was informed that the failure could not be duplicated. The contact associated the failure with TSB: 20-058 and 21-012, and NHTSA Campaign Number: 23V431000 (Back Over Prevention). The vehicle was taken back to the dealer, where the contact was informed that there would be a charge for a diagnostic test. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 10.

NHTSA ID

11755856

Incident

Oct 17, 2020

Mileage

10 mi

The contact owns a 2020 Honda Pilot. The contact stated that while driving at an undisclosed speed, the message that the radio was shutting off was displayed. Additionally, the speakers made a crackling sound before the radio shut off, and the main screen became inoperable. The contact referenced NHTSA Campaign Number: 23V431000 (Back Over Prevention); as a possible cause for the failure. The vehicle was taken to the dealer times; however, the technicians were unable to duplicate the issue. During the final visit, the dealer diagnosed the vehicle with an amplifier failure and replaced the part; however, the issue persisted. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 58,000.

NHTSA ID

11754784

Incident

Apr 1, 2026

Mileage

58,000 mi

I am reporting a severe safety defect regarding the automatic transmission on my 2020 Honda Pilot AWD (VIN: [XXX]). The vehicle experiences a violent and constant transmission vibration/judder under light throttle acceleration. On XXX, at 127,073 miles, an authorized Honda dealership officially diagnosed the vehicle under Repair Order # XXX, confirming the presence of "shudder at light throttle". Despite changing the transmission fluid as required by maintenance schedules, the issue persists. This failure causes unexpected vehicle hesitation and jerky shifts while driving at highway speeds, creating a high risk of rear-end collisions and posing an immediate safety hazard to my family and other drivers on the road. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11754200

Incident

Mar 5, 2026

Summary of safety defect and failed recall repair: Vehicle: 2020 Honda Pilot EX (Clean California Title) Core Issue: Persistent, catastrophic failure of the MOST Bus fiber-optic communication network, resulting in complete blackout of the federally mandated rear backup camera (FMVSS No. 111 violation), total infotainment reboot loops, loud audio cracking/popping, and instrument panel system failure during active vehicle operation at 65+ mph highway speeds. RECALL REMEDY FAILURE CHRONOLOGY: 1. IN-WARRANTY ANCHOR: On April 20, 2022 (34,201 miles) at Tracy Honda, initial network cracking/popping and communication faults were logged under factory warranty. Display head unit was replaced, but underlying MOST Bus backbone issues persisted. Fakra connectors replaced to attempt to fix the issue. 2. RECALL ATTEMPT: On July 17, 2025, at Lompoc Honda, the vehicle was presented specifically under Safety Recall Campaign 23-047 / NHTSA 23V-431. Dealer technicians installed FAKRA connectors and connector jumpers per official remedy instructions. 3. REMEDY FAILURE: The recall remedy failed to correct the defect. The vehicle continues to experience "Network Communication Lost" and "Check Tuner" system collapses, completely disabling the rear backup camera display without warning - all while being in a 10-minute reboot loops. SAFETY HAZARD: The sudden, unannounced loss of rear visibility and screen blackout creates a direct backover and collision hazard in violation of Federal Motor Vehicle Safety Standard No. 111. Furthermore, total network reboots at highway speeds cause severe driver distraction. REMEDY REQUESTED: American Honda Motor Co., Inc. has been notified (Corporate Case #XXX), but has failed to remedy this known federal safety defect after statutory repair opportunities. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11753899

Incident

Jul 25, 2026

Full brake system, Emissions System problem, and Service System malfunctioning, out of the blue. Factory Reset and System Updated performed with no improvement.

NHTSA ID

11751683

Incident

Jul 20, 2026

The contact owns a 2020 Honda Pilot. The contact stated that after starting the vehicle, there was an abnormal ticking sound coming from the engine. The vehicle was taken to the local dealer, who examined the engine and discovered metal shavings inside the oil pan and there was engine rod bearing damage. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was provided. The contact was informed of NHTSA Action Number: PE25008 (ENGINE). The contact stated that the vehicle had experienced the failure listed in the NHTSA Action Number. The failure mileage was 46,500.

NHTSA ID

11751571

Incident

Jun 30, 2026

Mileage

46,500 mi

Engine start/stop function fails to restart after automatically shutting off at a light or in traffic. It falters and fails to start, then the dashboard lights up with errors, and I have to put it into park before restarting. Sometimes it takes a few tries before restarting. The battery has been replaced twice in the last year and the starter motor within the last year too, but the issue persists.

NHTSA ID

11750995

Incident

Jul 16, 2026

When the vehicle is at a stoplight or stop sign, the engine regularly shuts off. The engine does not automatically restart and sometimes it takes several minutes to restart the engine, leaving the car blocking traffic at a light. This happens REPEATEDLY and often.

NHTSA ID

11750637

Incident

Jul 14, 2026

Service Bulletin - The wireless charger starts charging the phone and then stops charging, even when the phone remains in the correct position on the charger due to software specifications that can cause some phones to have issues charging.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2025 Passport Blacks, TrailSports & 2019-2022 Pilots with a customer complaint of the taillight and/or brake light being inoperative. Vehicles may also have the A6 10A or C27 7.5A fuse blown. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2025 Passport Blacks, TrailSports & 2019-2022 Pilots with a customer complaint of the taillight and/or brake light being inoperative. Vehicles may also have the A6 10A or C27 7.5A fuse blown. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

Service Bulletin - One or more accessory running board lights are flickering or not working due to a faulty running board light assembly.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2025 Passport Blacks, TrailSports & 2019-2022 Pilots with a customer complaint of the taillight and/or brake light being inoperative. Vehicles may also have the A6 10A or C27 7.5A fuse blown. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2025 Passport Blacks, TrailSports & 2019-2022 Pilots with a customer complaint of the taillight and/or brake light being inoperative. Vehicles may also have the A6 10A or C27 7.5A fuse blown. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.