2018 Acura TLX: false forward collision warnings

Filed Sep 22, 2026 · Driver assistance, Electrical · TN

I own a 2018 Acura TLX with approximately 41,384 miles. While driving, multiple safety-system warnings suddenly appeared simultaneously, including: Lane Keeping Assist Problem Adaptive Cruise Control Problem Auto High-Beam Problem Collision Mitigation System Problem Road Departure Mitigation System Problem Brake System warning I safely stopped the vehicle, shut it off, and restarted it. The warnings initially disappeared but later returned, including when I started the vehicle to take it to the Acura dealership. An authorized Acura dealership inspected the vehicle and retrieved multiple diagnostic trouble codes, including U3000-49, indicating an internal electronic failure associated with the multipurpose camera/driver-assistance system. The dealership cleared the codes, retested the vehicle, and confirmed that the fault returned. The technician also tested the battery, alternator, starter, and camera ground. The brake system was inspected, and no separate braking problem was identified. The dealership diagnosed a failed monocular camera requiring replacement. Safety concern: Multiple driver-assistance systems became unavailable unexpectedly while I was driving, including collision mitigation, lane-keeping assistance, road-departure mitigation, and adaptive cruise control. The simultaneous failure of these systems creates a safety concern because the vehicle's collision-prevention and driver-assistance features may be unavailable without advance warning. The dealership quoted approximately $2,400 for the camera replacement. The vehicle has only 41,384 miles. I have photographs and video documenting the dashboard warnings, as well as the dealership's diagnostic trouble code report and repair estimate. These records are available upon request. I am submitting this complaint to document the unexpected failure of multiple driver-assistance safety systems and request that the federal safety agency evaluate whether this represents a potential safety-related defect.

Filed Oct 5, 2025 · Driver assistance · CA

I got 5 lights on my dash stating that I have an auto high beam problem, road departure mitigation system problem, collision mitigation system problem, lane keeping assist problem, and adaptive cruise control problem. I got these lights on my dash at the exact same time and this happened 1 week after my car alarm started going off randomly. I will now have to change my windshield camera sensor. Seems like this is an issue with many Acura owners.

Filed Apr 17, 2025 · Driver assistance · 54,000 miles · TX

The contact owns a 2018 Acura TLX. The contact stated that while driving at an undisclosed speed, the Acura Watch warning light illuminated. The Adaptive Cruise Control, Lane Keep Assist System (LKAS), and Collision Mitigation warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the Acura Watch bumper sensor. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 54,000.

Filed Aug 22, 2019 · Brakes, Seat belts · 20,000 miles · NJ

This will be the 12th time where my car comes to a sudden and violent stop for no apparent reason - due to the collision mitigation breaking system activating with no cars in front of me. The last time this happened, a few weeks ago, there was someone behind me and it was a very close call. There was also a passenger who didn't know what hit him. I have brought the car in for service only to be told everything was fine. I attempted to bring it in for service again and I was given the run around that they had no availability for weeks. I have email correspondence with acura customer care and anyone involved in the purchase of this vehicle, including two separate dealerships and I have received a generic response with no solution offered. This is a dangerous system that is clearly not tested appropriately and I will be keeping it turned off just as long as I can remember to do so. These incidents vary - most times it occurred on a local street. It happened twice on an interstate highway as I was entering going about 45mph. All times this has happened I was traveling over approx 35mph

Filed Jul 29, 2019 · 10,000 miles · GA

On 6/25/19 at 16:39 I was driving my 2018 acura tlx northbound on a four lane city street at approximately 35 MPH. Road conditions were dry and clear. As I approached the intersection, the cmbs (collision mitigation braking system) beeped and brought the vehicle to a complete stop despite there being no car ahead. This surprised me and nearly caused an accident as the truck behind me had to stop suddenly. While braking the vehicle ignored all throttle input, thus my engine raced and spun the front tires once throttle input was restored. The event, with sound, was captured via my dashcam, I have attached a still image from the dashcam video and can supply the footage if needed. My acura is due for service next month and I plan to report this issue to my acura dealer at this time. I changed the vehicle 'forward collision warning distance' setting from 'long' (default) to 'short' and have not had the same issue recur.