Purchased this vehicle used, as-is, from a Ford dealership on August 18, 2026. Approximately 90 minutes after taking delivery, the vehicle began displaying multiple dashboard warning lights and lost access to Sport drive mode. The vehicle was returned to the selling dealership the same day; their technicians were unable to reproduce the fault or retrieve a diagnostic trouble code at that time. The vehicle was subsequently towed to an authorized Acura dealership for independent diagnosis. That inspection identified three separate issues: (1) the warning lights, attributed to a lean-running condition possibly caused by fuel quality; (2) a leaking front brake caliper, quoted at approximately 900 to repair; and (3) a fluid leak at the gasket between the transmission and transfer case, which the dealership states requires full replacement of both the transmission and transfer case, at an estimated cost of approximately 13,000. This transmission/transfer case leak occurs at the same location addressed in NHTSA Office of Defects Investigation Petition DP26001 (opened March 2026), covering 2021-2023 Acura TLX and 2022-2023 Acura MDX SH-AWD vehicles. NHTSA's review, resolved August 6, 2026, confirmed the underlying failure mechanism as real — splines connecting the transmission output shaft to the power take-off unit stripping or shearing, cutting power to the rear wheels — based on 62 owner complaints and manufacturer field reports, though NHTSA declined to mandate a recall. NHTSA's review also noted that the vehicle's dashboard provides no warning to the driver when this failure occurs. Given that this failure surfaced within 90 minutes of taking delivery of the vehicle, and that it matches a documented, federally-reviewed defect pattern on this exact model and drivetrain, I am filing this complaint to add to NHTSA's records on this known issue and to document a case where the failure manifested essentially immediately upon purchase.

Source: NHTSA complaint ODI #11763607 · view all complaints for this vehicle at nhtsa.gov

My vehicle was stolen from apartment parking structure. Car was locked and both keys were with me. Thieves were still able to get in my car and start the vehicle without the keys in less than 5 minutes. This problem has been happening all over the country try with Acura specifically. Just the other day at work another 2023 Acura TLX was stolen. I tried to speak with Acura and they said theft has increased and thieves can steal the car in seconds. This is a huge issue and Acura refuses to do anything about it such as updating their security hardware/firmware. The issue is all over the United States. Now for my new vehicle I need to install a 2000 dollar security system because acuras vehicle security is horrible.

Source: NHTSA complaint ODI #11635675 · view all complaints for this vehicle at nhtsa.gov

Loss of brake power with “brake” light and “brake service” light on. I was backing out of my driveway and lost almost all braking power almost pushing the pedal to the floor. Once I came to a stop, I turned the car off and turned it back on, brake pedal felt fine and lights went away at that point.

Source: NHTSA complaint ODI #11706420 · view all complaints for this vehicle at nhtsa.gov

We have a 2022 Acura TLX Type S and it has started to show an errors - Adaptive Damper System Problem. From what I can gather from reviewing articles on the Internet is that this problem is caused because of poor wiring design by Honda / Acura, which is causing speed sensors electronics to erode. There are also articles that Honda /Acura is aware of this problem and is currently gathering data. Our concern is that in Michigan, if you have these problems, specially during winter when the roads are icy - if your drive type is stuck in the wrong mode - That can be a safety hazard. Example -The adaptive damper system can cause the automobile to be stuck in sports mode on an icy road, making it dangerous to drive............ Further, consumers are aware that this is a fault of the manufacturer, in the way the wiring harness is routed within the automobiles chassis. This poor design exposes the electronics to unwanted elements from road, snow, salt, dirt etc. It is also reported that this wiring harness is an expensive item to fix, hence Acura is reluctant in taking the necessary effort in resolving this very known issue. Consumers pay a lot for these vehicles for their quality - If this is a known issue , Acura should take care of it and not force the consumers to drive acuras with potential safety issues.

Source: NHTSA complaint ODI #11749059 · view all complaints for this vehicle at nhtsa.gov