2021 Honda Pilot Engine

While driving vehicle downshifted with no warning and went into neutral. Was driving on a busy street. Was not able to shift back into drive. When car stops was not able to put it into park. No previous warning of anything wrong. No engine light, battery etc. illuminated on the dash. Earlier that day did hear from time to time a tick or tap like noise that had not been heard before. Car had to be towed to auto shop. Upon inspection was told all components are in working order but the engine is not working and needs to be repaired. Given the engine only has 109,000 miles this was odd to them based on condition of the vehicle. There is a known issue with Honda engines similar to this vehicle and asked we check with Honda as to what could be done to diagnose further. This is very concerning as there was no warning. Driving on a busy street with unexpected downshift was almost rear ended.

Check Engine Light came on during normal highway driving with Cylinder 2 Misfire as the readout. The vehicle was brought to local Honda dealer for troubleshooting and maintenance. Dealer maintained vehicle on schedule with 96,000 miles on it. Initially, informed us that this was due to the air filter housing being improperly placed and low power from the battery. Resolved both and then informed us it was an issue with the connecting rod/crankshaft and the engine would need to be replaced. During most recent fluids service about 2 months prior, had raised concerns about an intermittent shifting/low RPM jump and was told it was just debris but no real issue.

While driving the check engine light started flashing and lost a lot of power. Pulled over and turned the car off. Turned the car back on and the light was gone and power seemed to be back. Trying to get home about 15 minutes later every light came on. Lane assist, check engine, blind spot, traction control, literally all warning lights. When these came on the car lost all power within a minute. Wouldn't turn over or even power on to use lights or the radio. Got the car towed to two separate garages both stating engine failure. Honda dealer provided documentation of a bearing failure which damaged cylinder 5.

While stopped at a traffic light the “Auto Stop” engine shut off feature engaged. When releasing the brake, the vehicle completely shut down, all dash lights came on as did the transmission mode lights. Upon trying to restart with the start button, prompts came up to place the vehicle in park. Trans select button did not work. Pressed the Start button several more times. At one time all dash lights went off, except for the battery light. Brake pedal went all the way down to the floor. Opened the drivers door and then tried the start button one more time with the AutoStart button switched off after dash lights returned. Vehicle started after that. Blocked traffic for one traffic light sequence. Occurred on Route 30 and Schoolhouse Road; New Lenox IL on 10/25/25. Attempted to restart several times afterward and vehicle restarted. Trying to drive with “autostart” feature manually turned off from now on, if I remember. Scheduled checkup @ dealer 10/29/25. Honda of Joliet Vehicle has slightly over 40k miles.

Per the mechanic the rod bearing broke into the engine and caused sudden engine failure. I was on a highway when this occured, thankfully I was already in the right lane and right before an exit to which I took and secured the vehicle in a safe location. It was extremely dangerous location for this to occur and thankfully no one was right behind me. There were no warnings or messages prior to the incident. It was just routinely serviced within the past month. I heard a loud clank, the engine light started flashing, and the car started to slow down, there was knocking sounds in the engine. We had it towed to D and M service center then moved to Gillman Honda service center. It was confirmed by two different shops, D and M service center at 1029 Pat Booker Rd, Universal City, TX 78148 and Gillman Honda dealership at 16044 I-35 N Selma, TX 78154 that the rod bearing cracked into the engine and metal shavings were identified in the engine oil.

After stopping at a traffic light or stop sign the car's auto-stop/restart feature has failed multiple times to restart the engine. This has left the car stalled at a light and needing to manually place the car in park, turn off the electrical, then attempt to restart the vehicle. The problem started about 4 months ago and has been starting to happen more frequently.

The contact owns a 2021 Honda Pilot. The contact stated that while his wife was driving 50 MPH, the engine seized, and the functions on the vehicle became inoperable. After waiting for an hour, the vehicle restarted. The contact was unaware if there were any warning lights illuminated. The contact stated that on a separate occasion, while the contact's wife was driving 30 MPH, the engine seized. No warning lights were illuminated. After waiting for a long while, the vehicle was restarted. The vehicle was taken to another dealer, Honda of Whittier; however, no cause for the failure was found. The dealer restarted the vehicle. The contact stated that the failure persisted. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 15,000.

when stopped at a stop light the engine idle kills the engine and want start back up causing traffic backups...have to go through process to setting back to park and trying to start which does not happen quickly leaving people behind you frustrated and honking. This needs to have an option to disable it if you don't want that function as it's very frustrating and dangerous. Please get honda to fix issue. Thanks for your help.

AFTER I had the softwear update! When idle at stoplight, auto idle feature kicked on. When light turn green and I pushed gas, car shut off entirely. This happened on multiple occasions. While waiting for an appointment to get this issue looked at, my car failed to start after being parked. It would not start after a jump from another vehicle. The tow truck driver was able to bet it jumped using a battery pack case. At the dealership, battery failed load test. Waiting to see if starter needs to be replaced and valves adjusted under extended warranty.

The contact owns a 2021 Honda Pilot. The contact stated that while driving approximately 60 MPH, the brake pedal was depressed, and the vehicle lost motive power. The contact heard an abnormal rattling sound coming from the engine compartment. The contact stated that the check engine warning light was illuminated. The contact continued driving to the destination, parked the vehicle, and checked under the hood. The contact checked the oil level, which was normal. The vehicle was towed to a dealer. The dealer diagnosed the vehicle and determined that a connecting rod had failed and damaged the engine. The contact was advised by the dealer that the engine oil level was very low. The dealer determined that the engine needed to be replaced. The vehicle was not repaired. The contact researched online and related the failure to NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling); however, neither the VIN nor the model year was included. The manufacturer was informed of the failure. The failure mileage was approximately 72,000.

1. ABOUT A YEAR AGO THE ENGINE STOP/START FUNCTION STARTED TO FAIL INTERMITTENTLY. I WENT TO THE HONDA DEALER WHO THEY CHARGED US ABOUT $500 FOR A BATTERY AND NEVER MENTIONED A RECALL OR REPAIR. 2. ABOUT SIX WEEKS AGO THE AUTO ENGINE STOP/START FUNCTION FAILED TO RESTART THE ENGINE AFTER STOPPING. I THOUGHT IT WAS THE BATTERY AGAIN AND WENT BACK TO THE HONDA DEALER. THEY CHARGED ABOUT $1,500 FOR VARIOUS THINGS BUT STATED THAT THE AUTO STOP/START FUNCTION SOFTWARE HAD BEEN UPDATED AND IF THERE ANY FUTURE PROBLEMS TO RETURN. 8/19/2025. WE WERE ON THE INTERSTATE HWY IN STOP AND GO TRAFFIC. WE WERE STOPPED IN THE LEFT LANE AND THE TRAFFIC STARTED GOING AGAIN. THE CARS IN FRONT OF US STARTED GOING AND WE WERE LEFT BEHIND. THE CARS BEHIND US WENT AROUND AND WE WERE LEFT STALLED IN THE MIDDLE OF AN INTERSTATE HWY. AFTER A FEW MINUTES I GOT THE CAR RUNNING. BEING STALLED ON THE INSERSTATE HWY IS A LIFE THREATING ISSUE! I TOOK THE 2021 HONDA PILOT TO THE HONDA DEALER ON 8/20/2025 WHO STATES THAT THEY CANNOT DUPLICATE THE PROBLEM. PLEASE NOTE THIS THE THIRD (3RD) TRIP TO HONDA FOR THE SAME ISSUE. NO RESOLUTION THERE HAVE BEEN MANY OTHER TIMES WHERE THIS OCCURED AND I JUST TURNED THE FUNCTION OFF WHICH ONLY WORKS TILL THE NEXT TIME YOU DRIVE THE CAR. PLEASE HELP WITH THIS ISSUE BEFORE SOMEONE GETS HURT...

On multiple occasions, when sitting at a stop light and then attempting to drive as the light changes, the engine just shuts off as I take my foot off the brake. It then takes several attempts to get the car started.

The contact owns a 2021 Honda Pilot. The contact stated that while driving at various speeds, there was an abnormal ticking sound coming from the engine compartment. The vehicle was taken to the local dealer who diagnosed that the main engine bearings and connecting rods had failed. The contact was advised that the engine needed to be replaced. The vehicle was not yet repaired. The manufacturer was not yet contacted. The failure mileage was 143,000.

This is another incident of the auto start/stop system failing to restart the engine after a stop in traffic.

My wife was driving the family down the highway I was a passenger. While we were traveling approximately 70mph down a 4 lane highway there was a loud clunk with a consistent knock and an immediate loss of power. I was able to help navigate her to safety on an off ramp so that my family would be safely off the road. The vehicle was towed to the Honda dealer where it is currently under warranty. The mechanics at the dealership have confirmed a spun bearing on piston number 3 and the motor will need to be replaced. There were zero warning lights and and no notification from any sensors with an OBD tool. Honda America is only willing to replace the motor with a salvaged motor. Unfortunately the VIN from the car with the salvaged motor will not match my current VIN, so if there is an active recall on the engine like on the previous year pilots that are VIN specific, I will not be covered and Honda will have replaced my engine with a known faulty one. I nor should and other family have to take the risk of receiving faulty salvaged Honda parts while still under factory warranty. The attached file is the last service records that are available for the salvaged engine and as you can see there is a noted vibration at the front in as well. Honda refuses to send the information from the salvage yard detailing the engine information including current mileage and the date the motor was pulled from the salvaged vehicle.

My Honda's engine start-stop system isn't restarting at stop lights. Very frightening when the light turns green and I can’t go anywhere. I have to turn off the car and restart.

The car randomly fails to start up again after stopping it during an auto start auto stop cycle.

While stopped on a red light the auto idle engine restart was engaged, when I released my brakes the vehicle did not restart and went into neutral stalling the vehicle..

The contact owns a 2021 Honda Pilot. The contact stated while driving 70 MPH, the vehicle made an abnormal, loud rattling sound. The contact stated that her husband had noticed that the rattling sound persisted while the vehicle was parked. The contact stated that upon opening the hood to inspect the vehicle, the contact noticed that the driver's side engine cooling fan had melted. The contact purchased a new engine cooling fan from O'Reilly Auto Parts, and the vehicle was taken to Four Brothers Auto Services, where the engine cooling fan was replaced. The contact stated that while driving on another occasion, the vehicle made an abnormal rattling sound. The contact stated that while idling in line at the airport Arrival and Pick-Up level, the rattling sound became louder, and the vehicle made an abnormal popping sound. The contact stated that the engine started overheating. The contact pulled over to a safe location and inspected the underhood. The contact noticed that the passenger's side cooling fan had separated. The contact was able to drive to the destination. The vehicle was not diagnosed or repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 86,000.

The engine fails to restart at times after the auto engine idle cuts the engine off when stopped. The previous recall has been completed. When I returned my vehicle to the dealership to have it checked again because the same issue continued to occur, I was told the battery needed to be replaced. I have since replaced the battery with a Honda battery from the dealership yet the issue still occurs. It seems to be worse in cold weather.

So on Oct 25, 2024 I took my car to get an oil change at the moss bros Honda dealership. I always get all maintenance done there. Then a week later on Nov 3, 2024 my suv pilot broke down on the freeway it just started jerking and the screen kept glitching then right after the engine light went on. I was not aware of any signs for it to happen but Luckily there was a cop and a tow truck close by because who knows what would have happened. After that I took to the dealership on Tuesday and they inspected it then they come and tell me that my engine is done. So they were trying to charge me $8792 for a used engine. I just think is so weird that how everything happened knowing that is a semi new car and I been taking care of the maintenance so for this to happen I find it sketchy.

The automatic idle stop does not restart engine upon release of the brake pedal. It has been happening with increasing frequency.

My Honda Pilot has, on multiple occasions, just died after the auto engine idle stop engaged. I have had to put my vehicle back in park, restart it, immediately disable the auto idle stop and put it back in drive. On several other occasions it has also said "engine idle stop system unavailable". Even with that useless feature disabled my car will hesitate and kinda sputter when I stop at red lights. It's dangerous. I just bought this car from the Toyota Dealership in my area so I shouldn't be having these issues. There's less than 28,000 miles on it, I shouldn't be having any issues whatsoever.

This vehicle has some major concerns. I have issues with the starter on this thing not wanting to restart the engine after a traffic stop. Battery is fine and there are no obvious issues with the car other than the fact that the starter appears to barely spin the engine over the compression stroke. I have been a Honda owner for years but unless Honda issues a fix for this issue, i am finished with them. I continually turn off the auto stop/start feature out of fear that i will have issues at a traffic intersection. Please investigate this issue and force them to recall these vehicles. BTW my vehicle only has 28k miles on it so it is unacceptable for them to keep denying the issue exists when i take it to my dealer.

The autostart failed to restart at an intersection traffic light when light changed. It put us at risk of rear end collision while trying to decipher and correct issue. Message appeared to state car needed to go into park. Driver doesn't remember if they tried to put it into park due to stress of situation, but issue was resolved by shutting off car and then restarting.