2016 Acura MDX: misfire or rough idle

Filed Sep 5, 2026 · Engine · KS

"Vehicle experienced a sudden flashing check engine light pulled over checked oil restarted car flashing check engine light went away then started flashing again a few miles down the road (Cylinder 3 misfire) accompanied by severe engine knocking. The engine locked up/seized while hot. car was stuck on the road and was unable to shift to neutral. After cooling down, the engine restarted but produces a heavy metallic scraping and loud squealing noise from internal friction. This matches the exact failure mechanism of connecting rod bearing failure under investigation PE25008, but Honda/Acura has excluded this VIN from active recalls. I was forced to pay $389 out-of-pocket for an emergency tow."

Filed Jul 3, 2026 · Engine · WV

Started (first noticed)check engine light flashing turned radio down right of way and noticed engine knocking with no warning still 40% engine oil life left. Had test done P0303 misfire on cylinder 3 and rod bearing knock was told need an engine . Had all oil changes and maintenance done on time. ran my vin and unfortunately was told it is not covered under recall.

Filed May 28, 2026 · Engine · WA

FOUND #4 CYLINDER MISFIRE - METAL CONTAMINATION SPUN A BEARING INTERNALLY INSIDE THE ENGINE. RECOMMEND REPLACING THE ENGINE. SEE QUOTES BELOW: RECOMMEND AT THE SAME TIME AS THE ENGINE REPLACEMENT - STARTER, TIMING BELT, SPARK PLUGS, AND VALVE. Found #4 cylinder misfire – metal contamination – spun a bearing internally inside the engine. Recommend replacing the engine.” After researching this issue, I became concerned that this failure appears very similar to the widely reported connecting rod bearing failures associated with Acura/Honda 3.5L V6 engines and Recall 23V‑751. The symptoms in my vehicle closely match the issues described in the recall and related investigations, including: connecting rod bearing failure, spun bearing, internal engine damage, metal contamination, cylinder misfire, and complete engine failure. Additionally, I understand that the federal safety agency has expanded investigations into similar engine failures affecting Acura and Honda vehicles outside the original recall VIN population.

Filed Jul 18, 2025 · Engine, Fuel system · NJ

My vehicle is showing the exact same symptoms that the 2016-2018 MDX fuel pump recall is stating but my VIN number is not part of the vehicles being recalled. I reached out to Acura relations and unfortunately, they cannot provide authorization to repair my fuel pump even though my vehicle falls under the same years that this model is being recalled for. I went to an independent shop to try and understand what the problem with my vehicle is and I was told that the high pressure fuel pump seems to be failing and was asked why I have not taken the vehicle to the dealership for the fuel pump recall. Due to this issue I am unable to properly use my vehicle. If i step on the accelerator too hard, the vehicle gets engine misfires and immediately goes on limp mode.

Filed Feb 16, 2025 · Engine, Transmission · MO

What component or system failed or malfunctioned, and is it available for inspection upon request? The motor's rod bearing spun. It is available for inspection. How was your safety or the safety of others put at risk? The failure could have created enough friction between the bearing sleeve, rod and/or journal bearing to seize the motor and the drivetrain while driving. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes the vehicle was taken to the Acura dealership to be inspected, diagnosed and repaired. There is a recall for the same year, make and model but my vehicle's VIN is not included in the recall. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has only been inspected by the Acura dealership. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There was a check engine light that produced code P0430 (Catalyst System Efficiency Below Threshold Bank 2) and P0306 (Cylinder 6 Misfire Detected). The vehicle had a loss of power and troubles accelerating under load. The first time the problem was noticed was January 18th, 2025.

Filed Apr 24, 2024 · Engine, Fuel system · IL

Acura MDX 2016 SH-AWD with 113366 miles diagnosis according to warning lights. DTC test certification codes: P0301 Misfire No. 1 cylinder P0306 Misfire No. 6 cylinder P0300 Random Misfire P0420 Catalyst System efficiency below threshold B1 Recommendation was that the Catalytic converter be replaced. All these codes were identified under Honda's TSB 20-100 dated 2/2021 on Odyssey, Pilot and Ridgeline models where AH extended warranty to 10 years from date of purchase or 150K. These V6 engines are pretty close to that of the 2016 MDX. Is there a remote possibility that these DTC codes could exist in MDX V6 engines when an issue arises similar to those in the Honda vehicles? These DTC codes appeared 24 hours/37 miles after a routine oil service on 3/26/2024 at Advantage Acura of Naperville with a perfect inspection report. The malfunction occurred in the vicinity of McGrath Acura of Westmont on the following day of 3/27/2024. The concern is if any of the emission system components were damaged during the routine oil service. Advantage Acura have in the past installed brake pads backwards on my Acura TL 2010 for which I do have proof.

Filed Apr 28, 2020 · Transmission · 122,044 miles · IL

Acura needs to do something about this issue! My previous complaint was #11269881 and covered four separate incidences in 2019. This is a safety issue! Previously two of my for instances of this happening involved significant instant slowing down of the car (below 30 MPH) and RPM raising while while driving 70+ MPH on interstate is dangerous! This time the afternoon prior the car experienced a louder than normal engine sound and RPM like it was in a lower gear. On the morning of 4/24/20 when the car was started the warning lights came on and cycled through and remained on most of the day. It was not until the fourth time driving the car that they all stopped lighting up. However the car still seems to be driving in a lower gear but no lights remain on. This time it did not lose power before the lights came on. They just appeared on when we went to start the car in the morning. Trailer stabilization assist problem, road departure mitigation system problem, emissions system problem,brake system problem,power steering system problem,vehicle stability assist problem,hill start assist problem,. Mileage at 122,044. Last time my dealer told me it was misfiring so change the spark plugs. I did but it has happened now three more times since then.

Filed Oct 21, 2019 · Engine · 92,321 miles · IL

April 25,2019 driving from illinois to ms at 75 MPH on interstate and applied break for upcoming construction zone and all warning system lights flash through dash and care immediately started slowing and had no acceleration at all. Disabled all safety features. Road departure, brake system, ect. Pulled over to side of road. Restarted several times and all but two lights remained on so called dealer. Two lights remained flashing and car now seemed to drive ok so could be brought to dealer about 80 miles away. Memphis acura dealer wanted to keep car because they indicated transmission issue but since lights were reset they said take to dealer if comes on again. Mileage 92,321. Called peoria il acura dealer a week later to check on issue and they said code was imply a glitch. July 28, 2019 driving 40 MPH in town and all safety lights came on dash. Disable ed all safety features of vehicle. Restarted several times and eventually all lights but two remained on. A few hours later all lights were now off. Make appointment with peoria il acura dealer. Mileage 97,974. Peoria dealer said the lights some on because we needed our 105,000 servicing which includes about $1500 in service like plugs and timing belt. I challenge their claim (not at the mileage) that acura would cause a serious safety issue for us all to get us to do the service. They said unfortunately that is what happens. Next week had spark plugs replaced since they said that caused misfire code. August 21 2019 at 99,800 mileage driving 40 MPH all safety lights on car lost power and hesitated and then quickly went off. October 6 2019 at 105,392 mileage driving on interstate in illinois at about 75 MPH and applied break for rest stop and all lights on and this time rpms rose to between 5/6. Drove 20 MPH on side to rest stop. Restarted several times and only two lights remained. Car drivable.

Filed Sep 8, 2015 · Electrical, Engine · 368 miles · IL

On 9/3/15, I was pulling into my garage when all the warning lights on the dashboard went off - transmission, check engine, lane detection light etc. Since I was going out of town the next morning, I put it in reverse and drove directly to the dealer. The car was in "limp mode" and I could only drive 35-40 MPH. I showed the tech in the service dept. All the warning lights going off, and he said he had never seen anything like this before. He wrote up a work order with the following info: inspect for check engine light on, check engine light flashing and every warning light in the vehicle is on, would not accelerate over 35 MPH. The following day I was contacted by the service dept. And was told they could not find a problem; there were no lights on, they even drove it for 40 miles. The service dept. Said they are only allowed to hold the car for five days. Today, 9/8/25 I picked up the car. The dealer's invoice reads: cause: light on 123505 diagnostic trouble codes/programmed fuel injection (pgm-fi) retrieve codes with the hds, read data, 74 wa3. Inspected for check engine light on, found dtc p0303 (cylinder # 3 misfire) recorded freeze data and cleared codes, at time of inspection vehicle was running perfectly, test drove vehicle twice on extended test drives and engine ran perfectly, no dtcs are reset no problem is present at this time. Since the service dept. Could not find the problem and fix it, this means the car has not been repaired and I am driving a defective car. The next time the warning lights go on, I could be travelling on a crowded freeway at a high rate of speed (with my family inside), the car goes in to "limp mode - 35 MPH and an accident occurs. This is a safety issue. How can acura manufacture a $50,000.00 car and their dealership not be able to find the problem and repair it?