I was driving my 2016 Acura MDX (approximately 87,000 miles) at around 60 mph on the freeway when the engine began making a metallic clanking noise. Shortly after, the check engine light started flashing, and the vehicle lost acceleration, eventually coming to a complete stop. This created a potentially dangerous situation, but I was fortunately able to pull over safely. After the vehicle stopped, the engine would not restart. The mechanic who inspected the vehicle confirmed that the engine has seized. This incident occurred without any prior warning signs and could have resulted in a severe accident. I believe this issue poses a significant safety risk to drivers and passengers. I request an investigation into whether this problem could be due to a manufacturing defect or systemic issue with this model.

- Milpitas, CA, USA

Failure of connecting rod bearings leading to complete engine failure.

- Ruidoso, NM, USA

I was driving back yo my home with my family and on freeway Acura MDX engine stopped with clanking metallic sound fortunately I was able to stop safely. This VIN [XXX] should be part of recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Milpitas, CA, USA

While waiting to turn left from a busy street onto a highway, the engine seized. The car was unable to be moved from it's location in the center of the busy street with cars approaching quickly from behind and weaving around my stopped vehicle. I had the vehicle towed to Metro Acura in Montclair, CA and they confirmed that the connecting rod bearing had failed causing the engine to seize. They also confirmed that the vehicle is not part of the existing recall. The engine produced some rough noise prior to failing but otherwise did not provide any warning lamps or other messages.

- Chino Hills, CA, USA

Engine started knocking and quit working while driving on the freeway. Was a connected rod bearing failure that was not included under the warranty or recall. Honda paid 75% of repairs but I had to pay $3300 myself.

- Logan, UT, USA

The engine failed and was unable to be repaired like old Honda and they had no interest in resolving the issue, nor do they offer any replacement with.

- Yardley, PA, USA

We were on a highway drive to a state park 45 minutes from our house on [XXX]. 40 Minutes into the drive the check engine light flashed. We had just taken a long road trip from Minnesota to Ohio (and back again) the week before (10/15-10/20) and had NO problems whatsoever. We parked and read what we could online as to what to do. Checked the gas cap tightness, the oil, etc. and let the engine cool for 2 hours. Started the car and no lights came on. So we started driving home. 35 Minutes later ALL the lights on the dash came on. Scrolling through every system in the car-transmission, brakes, lane assist, etc. We pulled Over almost immediately. Turned the car off checked under the hood but nothing seemed glaringly wrong. It wasn-??t overheating or smoking or anything. We tried to drive it directly to our mechanic. Got back on the highway and the engine would not get up to speed, just groaning. Worried we would be in danger on the highway we pulled over and called for a tow. The first mechanic that reviewed (just local not Honda) could hear a knocking in the engine. Towed it to an Acura dealership on 10/28/2024. The Acura mechanic there confirmed that it is a rod/rod bearing issue-?"but we don-??t fall under the recall. The rod came loose in the engine, banged around, damaging the engine. Cost to fix is $10,000. This information came to us on 11/4. We filed a complaint with the Acura/Honda recall department that day. We have been waiting to hear their verdict (after their investigation) for the last week. We have been told multiple times that our car doesn-??t fall under the original recall. But the Acura mechanic has confirmed it is the same issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Burnsville, MN, USA

Driving on the highway for the car to idle, slow down and shut off, causing us to go to the shoulder in a busy intersection. No fore warning just died and won-??t start. Waited 20-30 minute to restart. The car will start but will not shift to neutral or drive.

- Grand Prairie , TX, USA

The auto engine idle feature activated at a stoplight as normal, but when I lifted my foot from the brake to accelerate, the car shut down, shifted into neutral, and wouldn-??t restart. This happenwd 3 times in the last two days, leaving me stalled in heavy traffic for several minutes before i can get the car started again. This is extremely dangerous.

- Topsfield, MA, USA

I have the same issue but my vin does not meet the requirement. reading multiple forum and a lot of people having the same issue. NHTSA RECALL NUMBER:23V-751 MFR CAMPAIGN ID:OH6 CAMPAIGN DESCRIPTION:2016-20 MDX Conn Rod Inspect Recall RECALL DATE:11/08/2023 RECALL STATUS:17 Character VIN Required SUMMARY: American Honda Motor Co., Inc. (Honda) is recalling certain 2016-2020 model year MDX vehicles. Due to a manufacturing defect of the engine crankshaft, the connecting rod bearing can prematurely wear and seize. SAFETY RISK: If the connecting rod bearing seizes, the engine can be damaged and run improperly, stall, stop while driving, and/or not start, increasing the risk of a fire, crash or injury.

- Jurupa Valley, CA, USA

Our engine is exhibiting symptoms currently related to an open recall by Acura for Connecting Rod Bearings. Our 2016 MDX is one of the affected model years but as of now our VIN is not included in the recall. I don't believe this is coincidence. I believe the mechanical issue is more widespread than Acura wants to reveal and is subsequently limiting the VIV numbers it includes. I am trying to be proactive in this regard prior to an incident taking place.

- Celina, TX, USA

The contact owns a 2016 Acura MDX. The contact stated while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was towed to an independent mechanic, but the vehicle was not diagnosed or repaired. The vehicle was then towed to the dealer, but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was not available.

- Live Oak, FL, USA

The connecting rod and bearing failed, causing the engine to immediately seize while in full operation on the highway. Components are available. The engine rod catastrophically failed and shot through the oil pan. Engine seized and lost power while on highway, cruising at 75mph. Flying engine components and the immediately loss of power was a major safety risk. The car was towed to the dealer and they found the rod bearing had sheared off. American Honda has been sent pictures. My model and year were affected by a recall on the failed components but my VIN was not identified. The car had no warning lights on the dash and was been recently serviced.

- Portland , OR, USA

The contact owns a 2016 Acura MDX. The contact stated that while driving at an undisclosed speed, the vehicle made a rattling sound with the check engine warning light illuminated. The vehicle failed to accelerate properly. The vehicle was taken to a nearby independent mechanic; however, the vehicle was not diagnosed. The vehicle was towed to a dealer, where it was diagnosed, and the contact was informed that there were metal shavings at the bottom of the oil pan. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to Technical Service Bulletin: 23-036. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 108,500.

- Lincoln, CA, USA

We have a 2016 Acura MDX and it has automatically shifted to Neutral 3 times (twice while driving on the freeway and 1x yesterday while driving on the street at normal speeds) in the last 2 months. On the MDX dashboard, it will display "Emissions System Problem" and then display "Stop Driving When Safe. Transmission Problem. See Manual." However, the car will automatically shift to Neutral within seconds. My children's lives (7 y/o and 5 y/o) were placed in danger as a result of this system failure. I have contacted the Acura Honda Recall Specialists and Client Relations Representatives. The car is being diagnosed at Cerritos Acura dealership at the present time. A case number has been filed since our VIN shows no recall, despite it having recalls for other 2016 Acura MDXs.

- Anaheim, CA, USA

I was driving the car, when I saw a sign pop up on the dash saying " Emission Systems problem" and the car completely stopped within a 100 feet. The car passed the Emissions and Inspection the previous day and I have a registration till June 30, 2026 now. There was a clicking noise that I heard when driving during the morning. I had never heard it previously. There was an oil change sign for about 3-4 days buy there were no other warning lamps. Here is the video of the problem from the dealer - [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Herndon, VA, USA

After traveling about on a 4 hour drive, my daughter who was driving the vehicle slowed down to make a turn. That's when she heard a loud clanking noise coming from the engine. She immediately pulled over and turned off the engine/vehicle. I went to meet her, and replicated the same problem when I turned the ignition switch to to on. It sounded as if there was some large piece of metal loose inside the engine -- it did not have consistency and was highly variable with regards to the sound it was making. The "Check Engine" light was on. Fortunately this did not occurr going at high/freeway speeds, yet the safety was compromised when my daughter was fortunate enough to leverage the momentum to get to the side of the road. Additionally, she was not in a spot where there was a shoulder/it was under an overpass, so she had to be careful and turned on her emergency lights. We had the vehicle towed to the nearby Honda Dealer. I am attaching their report and findings. They recommended engine be replaced; which we agreed to have done. Additionally, we continue to have problems due to the mounting and shacking which we believe comes from the installment of the new engine. We are submitting that report as well. At present, my daughter is not driving the vehicle and is relying on rides or borrowing other people's vehicles.

- San Antonio, TX, USA

While driving our well-maintained 2016 Acura MDX on a 30-minute drive on [XXX], I heard a pop, and then the engine lost power. I couldn't get the RPMs over 2500. A fluttering noise evolved into knocking and the vehicle became increasingly sluggish and heavy. The check engine light started blinking, but the vehicle's temperature gauge showed no changes. There wasn't any smoke or unusual smells. I felt terrified trying to get safely onto the side of the road with cars driving at full speed. I had the car dropped off at our local service station and the owner determined that the engine cylinder was loose and lost compression with a knock. He says that the engine light did not give a code. The owner determined that we need to replace the engine. A rebuilt engine will cost us $8,000. When I called Acura, the service person I spoke with seemed surprised that our 8-year-old car with only 77,000 miles needed a new engine. Since Acura has so many cars to deal with on the latest recall, he said it would be weeks before anyone can look at it. I researched and found that our VPN was NOT included in the recent recall of 2016-2020 model year MDX vehicles all with the same problems. How can that be"??" INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Bethesda, MD, USA

I am writing to bring to your immediate attention a critical safety issue with my 2016 Acura MDX, and the subsequent exclusion of my vehicle from a known recall that directly addresses the problems we are experiencing. Without any prior warning, we began hearing a fluttering sound coming from the engine whenever we accelerated. This noise progressively worsened and evolved into a pronounced knocking noise.Concurrently, the vehicle became increasingly sluggish and heavy, resulting in significant difficulty when accelerating. Despite these alarming symptoms, the vehicle's temperature gauge showed no changes, there was no smoke or unusual smells, and the check engine light did not activate. Gravely concerned for our safety, we promptly took the vehicle to our local mechanic for a thorough inspection.The diagnosis revealed significant engine damage, specifically to the connecting rod bearings and the crankshaft. Given the severity of the issue, we then brought the vehicle to the closest Acura dealership, Pohanka Acura. The service advisor informed us of a recall affecting the engine and rod bearings in the 2016 Acura MDX model. They also confirmed that our vehicle's engine was indeed damaged due to the same rod bearings and crankshaft issue described in the recall. However, despite this clear evidence, we were informed that our vehicle's VIN was excluded from the recall repair. The technician who performed the diagnostic on our vehicle recommended a new short engine block, which is was concerning especially since it mirrors the known recall issue. I am requesting that the NHTSA urgently investigate this matter. I hope the NHTSA treats this issue with the utmost urgency and seriousness it warrants. The safety of Acura MDX owners is at stake, and immediate action is essential to prevent further incidents and ensure our safety. Thank you for your prompt attention to this critical matter. I await your swift response and resolution. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA),

- Brambleton, VA, USA

See attachment for detailed explanation

- Vancouover, WA, USA