Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Acura TLX owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Acura TLX. The contact stated while driving 65 MPH, the steering wheel started shuddering and the check engine warning light was illuminated. The contact pulled to the side of the road and turned off the vehicle. The contact stated that the vehicle failed to restart after several attempts and was jumpstarted by a tow truck operator. The contact noticed an abnormal knocking sound coming from the engine. The vehicle was towed to the dealer, where it was diagnosed that the connecting rod bearing or the crankshaft bearing had failed, causing major engine failure. The dealer rebuilt the engine. The vehicle was repaired under warranty. The contact later received notification of NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The local dealer was contacted. …
The contact owns a 2018 Acura TLX. The contact stated the vehicle was included in NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling), for a possible failure with the connecting rod, and the vehicle was repaired. Approximately 2-3 years after the recall repair, while driving 65 MPH, the vehicle started losing motive power while accelerating. The contact coasted to the side of the road and became aware of oil leaking from the vehicle. There were several unknown warning lights illuminated. The vehicle was towed to the dealer, who diagnosed the vehicle with 4 blown pistons, causing the engine to fail. The contact stated that the previous recall stated that the engine would be replaced as needed. The dealer informed the contact that the engine was no longer covered because the vehicle exceeded the mileage and time limitations. The vehicle was not repaired. …
The contact owns a 2018 Acura TLX. The contact received notification of NHTSA Campaign Numbers: 23V858000 (Fuel System, Gasoline) and 23V751000 (Engine and Engine Cooling) however, the parts to do the recalls repairs were not yet available. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle only responded as needed when the accelerator pedal was depressed with excessive force. There was no warning light illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The failure mileage was approximately 50,000. Parts distribution disconnect.
The contact owns a 2018 Acura TLX. The contact received notification of NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling). The contact stated that when the vehicle was started, the vehicle was idling roughly. Additionally, the accelerator pedal was depressed and there was an abnormal knocking sound coming from the engine. The contact stated that the knocking became faster and louder while depressing the accelerator pedal. The vehicle was taken to a dealer where it was diagnosed and determined that the rod bearing needed to be replaced; however, the part to complete the recall repair was not available. VIN tool confirms parts not available. The vehicle was not repaired. The manufacturer was advised of the failure. The failure mileage was approximately 40,000.
The contact owns a 2018 Acura TLX. The contact stated that while driving at an undisclosed speed, the vehicle stalled approximately ten times. The vehicle inadvertently shifted into neutral. The vehicle was restarted after five minutes. The local dealer was contacted. The vehicle was diagnosed and repaired. The manufacturer was not contacted. The failure mileage was approximately 47,700. Consumer stated there was a known software bug in the auto idle feature, that needed updating. Consumer took the car to the dealer and had the software updated.
The contact owns a 2018 Acura TLX. The contact received notification of NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling). The contact stated while driving approximately 10 MPH, several unknown warning lights illuminated, and the vehicle stalled. The contact stated that the steering wheel seized, and the vehicle stalled. The vehicle was not able to be restarted and was towed to the dealer but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 107,000.
The contact owns a 2018 Acura TLX. The contact stated that while starting the vehicle, the engine started knocking. The contact associated the failure with NHTSA Campaign Number: 23V751000 (Engine and Engine Cooling). The contact stated that the closest dealer was a two-hour drive from the residence. The manufacturer was contacted by phone and was made aware of the failure. The failure mileage was approximately 89,000.
i took my car to acura carland in duluth georgia and i went initially for a check up on my recall i was notified for regarding my rod bearing and was told that there's nothing they can do about it and offered to do a wheel alignment on my vehicle and that should help with the knocking noise i had coming from my engine and that i would have to wait till january for anything else regarding my recall. i asked what could i do until then and i was told to keep up with my oil change and that its until january. i even asked for a loaner and was denied stating that they don't offer that which was hard to believe. …
My name is [redacted] On [redacted] while driving to lunch from work. I heard a faint knocking noise from my car. Came back to work and schedule an appointment with my mechanic dealer in Atlanta and there i notice a recall regarding the rod bearing. On the way back to where I was staying in Savannah Ga, the noise gotten a little louder when i pulled up in the driveway. I didn't want to drive it so i call a local Acura dealership in Savannah. The tow truck that came to pick up the car ask if the car was drive-able to load on truck. When i crank it...he said that the rod. From the car was towed to Southern Motors Acura in Savannah. My dealership mechanic is Nalley Acura in Atlanta Ga. Since Nov 30th, i been in a rental out of pocket since Feb 25, 2024. Each time i speak with American Honda they tell me the parts are not available as of yet. …
The vehicle experienced vibration symptoms and stalled on the road. The day before it stalled, there were rattling noises which prompted me to take the car to the dealership the next day. I had just received the letter about the recall so I knew it was likely related. The car was towed to the Acura dealership but the dealership denied recall coverage, stating the engine number did not match the recall list. During the discovery process, it was later discovered that the engine had been swapped by the dealership in 2018 - a fact that was not disclosed to me at the time of my purchase. The installed engine still falls within the recall defect interval of 2015-2020 but they are resistant to repair. Upon initial inspection of the vehicle, the dealership found metal shavings in the oil indicating internal engine damage. …
Related recalls
Engine and engine cooling › Engine › Hard parts internal/mechanical
Honda (American Honda Motor Co.) is recalling certain 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2016 and 2018-2019 Pilot, 2017 and 2019 Ridgeline, and 2018-2019 Odyssey vehicles. Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine.
Remedy: Dealers will inspect and repair, or replace the engine as necessary, free of charge. Owner letters were mailed March 28, 2024. 2016-2017 Acura MDX owner letters were mailed November 1, 2024.
NHTSA investigations
Engine failure
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.
Engine failure
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).
No Restart After Auto Start/Stop Engages
On June 3, 2022, the O ce of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several eld 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 tra c light or road intersection with the AIS function engaged.
Engine complaints in other TLX years
Frequently asked questions
How common are engine problems on the 2018 Acura TLX?
NHTSA has 43 complaints about the engine & cooling of the 2018 Acura TLX, 45% of the model year's 96 complaints.
Is there a recall for 2018 Acura TLX engine problems?
Yes — NHTSA recall 23V-751 (hard parts internal/mechanical, Nov 13, 2023). Recall repairs are free at authorized dealers.
At what mileage do 2018 Acura TLX engine problems start?
Half of the complaints with a recorded mileage happened before about 71,000 miles, and 10% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.