2021 Honda Pilot engine problems

Filed Nov 4, 2026 · Electrical, Engine · CA

The contact owns a 2021 Honda Pilot. The contact stated that the Auto Idle Stop system repeatedly failed to restart the engine after stopping. During the failure, the message "Shift to Park" was displayed. The vehicle was taken to the dealer on multiple occasions, where the battery and starter were replaced; however, the failure persisted. The manufacturer was notified of the failure and provided no assistance, referring the contact to the dealer for additional diagnostic testing. The failure mileage was unknown.

Filed Oct 30, 2026 · Engine · PA

I am filing this complaint as a proactive safety measure regarding my 2021 Honda Pilot EX-L, equipped with the 3.5-liter V6 engine. I am deeply concerned about the severe manufacturing defect involving connecting rod bearing failures that cause sudden, catastrophic engine stalling and total loss of motive power while driving. This exact defect was the subject of the federal safety agency Recall Campaign 23V‑751. However, Honda arbitrarily restricted that recall to select 2016, 2018, and 2019 model years. As a current owner of a 2021 model year vehicle utilizing the exact same J-Series V6 engine architecture, my vehicle is suffering from the exact same underlying vulnerability but is entirely excluded from safety protections and repair remedies. A sudden engine failure at highway speeds poses an extreme and immediate safety risk to myself, my passengers, and other drivers on the road. I am submitting this to formally urge the federal safety agency to expand its current investigation into Honda’s V6 engine failures and force American Honda Motor Co. to expand Recall 23V‑751 to include the 2021 Honda Pilot fleet before a catastrophic failure occurs.

Filed Oct 25, 2026 · Engine · PA

On four occasions, my 2021 Honda Pilot SE AWD (VIN [XXX]) has shut off at a stop under the Auto Idle Stop system and then failed to restart, leaving the driver stranded. The incidents happened on XXX, XXX, XXX, and XXX in and around [XXX]. Component: The starter system and the Auto Idle Stop engine restart function. Honda has acknowledged this exact condition in Service Bulletin 23-009 and Warranty Extension 23-009/23-010 (“Engine Does Not Auto Restart After Entering Auto Idle Stop”). The listed remedy is a software update, a valve adjustment, and replacement of the starter assembly and starter relays. The vehicle and the original starter are available for inspection on request. Safety risk: The engine shuts off at stops as designed, then will not restart. The vehicle is left disabled at intersections and in traffic with no warning, which puts the driver and passengers at risk of being rear-ended and stranded. My wife has been stranded four times. Idle Stop turns itself back on every time the car is started, so the driver’s only protection is remembering to switch it off manually on every trip. The fourth failure happened when she forgot. Dealer confirmation: The Honda dealer in [XXX] has performed Product Update 23-008, the PGM-FI Idle Stop software update XXX, and a valve adjustment XXX. The failure has continued after both repairs. The dealer has not replaced the starter assembly and relays, which is the remaining step of Honda’s published remedy. Manufacturer involvement: American Honda Customer Relations has opened Case #XXX and is “reviewing” my request. Honda has not inspected the vehicle directly. No police or insurance inspection has taken place. Warning signs: The failure to start is random when auto start is not disabled, and motor is hot. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 23, 2026 · Engine · AR

The auto idle stop feature will turn my engine off like it's supposed to, but then my engine dies when I try to accelerate again. This is happening more and more. I would allow my car to be inspected. My car tried to roll backward into the car behind me today, and I have held up traffic each time this has happened. I have seen on chatrooms that other honda pilots have this problem. No one has inspected my vehicle. This time my car went into neutral and flashed an alert that my car was now in neutral.

Filed Oct 23, 2026 · Engine · NC

While stopped at red light or stop sign the car goes into engine auto off mode when the brake is pressed. When then trying to go, the car is turning off or going to neutral. This causes vehicles behind me to stop suddenly and can cause an accident. The only way to then go is to turn the vehicle off, and restart, then put back in drive. This is happening very frequently and again is a safety hazard for me and others.

Filed Oct 22, 2026 · Electrical, Engine · AZ

To Whom It May Concern: I am requesting immediate escalation of a serious safety concern involving my 2021 Honda Pilot Touring, which I purchased as a Honda Certified Pre-Owned vehicle directly from Tempe Honda. I also purchased additional warranty coverage at the time of sale. I have owned this vehicle for less than two years, and it has already required service for an issue involving the automatic idle-stop system. That issue remains unresolved. More recently, the vehicle has begun unexpectedly shifting into neutral without any action on my part. This has occurred on multiple occasions, including when transitioning from reverse into drive and, most alarmingly, while attempting to accelerate from a complete stop at a traffic light. During these incidents, the neutral indicator actually illuminates on the dashboard. This is not simply an inconvenience or a minor performance concern. It is a potentially dangerous malfunction that places me, my passengers, and other motorists at risk. I am particularly concerned because I am a single mother who relies on this vehicle for daily transportation, including transporting my child.

Filed Oct 12, 2026 · Engine · GA

My vehicle's auto idle engine stops when brake is engaged, goes into neutral when released instead of restarting causing me to have to turn on the flashers, shift into park, turn off the ignition then restart. I was almost rear ended at an intersection & held up traffic during another occurrence, causing impatience behind me. I then found numerous complaints on the same by Honda owners & extended 10-year warranty via service bulletins 23-008 & 23-009. I brought my vehicle into the dealership to be diagnosed on 9/29/26, & they said it needed the referenced valve adjustment & performed it. A few days later, on 10/4/26, it happened again in a grocery store parking lot as I stopped for a vehicle pulling out of space. I called the next morning & made the appt to have the starter diagnosed later in the week. Later that day, it happened again at a red light. I brought it back to the dealership on 10/9/26 & advisor called a few hours later to say said the starter was pulling too much power & causing the problem & needed replacement, but did not have it in stock, with no expected date, but would contact me as soon as they received it. About an hour later, he called back & said he was sorry to inform me that the starter was NOT covered under the 10-year ext. warranty for my VIN, just the valve adjustment (which did not resolve the issue) even though the tech said the starter pulling too much power was causing the problem. I was then provided a $1200 estimate- for a malfunction that is a widespread defect! As I questioned this, I was given the toll-free number to American Honda for an explanation. I spoke to them on 10/12/26 to question why the determination was made to exclude my vehicle’s VIN from the starter replacement. The representative confirmed that the starter & assembly were not covered for my VIN & stated he did not know how or why Honda arrived at that determination. I thought I was making a wise decision purchasing a Honda. Any advice as to how to proceed?

Filed Oct 1, 2026 · Electrical, Engine · TX

Idle auto stop / start - this has repeatedly failed at traffic lights. Vehicle stops dead and will not restart. Taken to 3 dealers over the course of 18 months and finally the 3rd Honda dealership acknowledged this. The problem has been identified and repeated by dealership mechanics. No warning lights at all.

Filed Sep 30, 2026 · Electrical, Engine · 122,993 miles · TX

The contact owns a 2021 Honda Pilot. The contact stated that the vehicle was previously repaired under Technical Service Bulletin: 23-008 (Product Update: PGM-FI Idle Stop Software Update); however, the failure occurred after the product update. The contact stated that the vehicle hesitated to start after pressing the Engine Start button. The engine failed restart after coming to a complete stop and releasing the brake pedal and the Auto Idle Stop feature engaged. The battery warning light was illuminated, and the messages "Battery Failure" and "Press Brakes - Put the Car in Park and Restart" were displayed. The contact deactivated the Auto Idle Stop feature. The vehicle was taken to the dealer, who determined that the starter needed to be replaced. The failure mileage was 122,993.

Filed Sep 29, 2026 · Engine, Fuel system · VA

While driving with my family in my 2021 Pilot on the interstate at 75mph, I felt a shudder while in traffic. Fortunately, I signaled to get over and cars around me responded, because the check engine light flashed on and off and the car shut off. We had enough time to roll to the side of the interstate safely because drivers around me were aware and considerate. The car would not restart so we had to tow it. The Pilot has been evaluated by an independent mechanic who says that a failure in the high pressure fuel pump caused oil to dilute gasoline. A full engine replacement is required. There was no prior warning of this issue. American Honda has been contacted for potential support. Early stage of that, but dealing with them has, so far, been great.