Adaptive Cruise Control problems of the 2020 Acura MDX

Monocular windshield camera failed for no apparent reason on five-year-old car with less than 50k miles. Dealer cost to fix $2k. My concern is there are an many individuals on the Acura Mdx forums complaining of the same problem. It appears to be a relatively common but very costly failure on many Honda vehicles that use similar cameras. I believe this is worthy of an investigation, especially since the camera is necessary for many safety related features to function properly.

My 2020 Acura Mdx is throwing up multiple dashboard warnings related to the camera sensor—involving systems like adaptive cruise control, lane keeping assist, collision mitigation, and road departure mitigation. These systems rely heavily on the multipurpose camera unit mounted near the rearview mirror. I took it to my Acura dealership service and they concluded it's the multipurpose camera unit that's causing all these dashboard warnings. They are charging me $1800+ for a new one to be installed. I have researched and googled this issue online, and there were hundreds and hundreds of comments from Honda car owners that have faced this issue, especially Honda and Acura models made in 2019-2020. Many have bought a used camera unit for approx. $150 online and got it installed & calibrated. Others have said that this camera unit is so hot to the touch since it's located under the windshield. I agree with a lot of these Honda/Acura owners that this malfunction of this camera is a safety issue for the car drivers and others around them since these codes just pops out suddenly making the drivers so nervous during driving. Also, these cameras under the windshield get so, so hot that it could also start a combustible hazard. These units should be encased in a heat-tolerant case/cover and not metal.

Failed component: front camera system controlling adaptive cruise control, lane departure warning, lane keeping assist, and other safety features. Safety risk: loss of these systems increases risk of collision, lane drift, and reduced driver reaction time. Date issue began: August 12, 2025. Confirmation: problem reproduced and confirmed by authorized Acura dealership. Inspections: inspected by Acura dealership only. Symptoms: dashboard alerts immediately after startup stating adaptive cruise control, lane departure warning, and lane keeping assist are unavailable; warnings remain active while driving.

Malfunction: road mitigation system failed (rdm), lane keeping assist system (lkas) failed, and cruse control failed, after investigating the issue this is happening with multiple vehicles. Safety: yes, these all failed at the same time, poses significant safety issues for the diver, passengers, and other drivers due to nature of failure. Conformation: at this time no inspection of the vehicle has transpired. No other waning lamps or messages, prior to suddenly showing up today 6/18/25.

I am reporting a failure of the multipurpose front windshield camera in my vehicle, which resulted in the loss of multiple safety systems including lane keeping assist system (lkas), road departure mitigation (rdm), adaptive cruise control (acc), auto high-beam, and collision mitigation braking system (cmbs). These features are critical to safe driving, and their sudden deactivation poses a serious safety risk to both the driver and others on the road. This issue required costly repairs. I believe this represents a safety defect that should be investigated by NHTSA.

Faulty windshield camera. Which fails due to overheating. And sets off problem lights on the dashboard. Lane keep assist , lane departure, brake problem. This seems to be a common problem with this faulty design. To replace this part is $2,000 which who knows if it will fail again. So know one is forced to drive around with the constant problem lights and the uneasy feeling of not having brake assistance when and if needed. This puts not only the driver and passengers lives at risk but the lives of the public.

### 1. **what component or system failed or malfunctioned, and is it available for inspection upon request?** the rearview camera system in my 2020 Acura Mdx has malfunctioned. The camera, which is integral to several safety systems in the vehicle, has failed, causing significant safety concerns. The vehicle is available for inspection by an Acura dealership or independent service center upon request. ### 2. * was your safety or the safety of others put at risk?** the malfunction of the rearview camera directly impacts the **collision mitigation braking system (cmbs)**, **adaptive cruise control (acc)**, and **lane departure warning (ldw)** systems. These systems rely on cameras and sensors to detect obstacles, maintain a safe following distance, and alert the driver when switching lanes. Without the proper function of the rearview camera, these safety systems become unreliable, increasing the risk of head-on collisions, rear-end accidents, or unintended lane changes, which could lead to a serious crash. Furthermore, the area surrounding the malfunctioning camera becomes dangerously hot, posing a burn risk when touched, which adds another safety hazard. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? yes I have taken the vehicle to a dealership for a formal inspection, I have confirmed the issue through the consistent malfunctioning of the camera. The overheating and failure of the camera have been present since the issue began, and I have communicated this to Acura's customer service. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? the vehicle has been inspected by the manufacturer beyond the initial communication with Acura’s customer service. No inspection has been conducted by the police or insurance representatives. However, I have made Acura aware of the problem, and the customer service team, led by account manager monica.

I'm not sure if there is a problem with any of the components, but the radar sensor malfunction impacted the vehicle's braking system. Situation: on [xxx], I was driving with my wife and her nephew from my home (ankeny, IA) to indiana on [xxx] [xxx] and [xxx] [xxx] . It was snowing that day. As usual, there were other vehicles on the highway, semi-trucks, pickup trucks, cars. The snow was splashing on to my front bumper, lights, radar sensor and windshield. As it was snowing, I did not engage the cruise control feature. We were around 30 miles from iowa city, I was passing a semi-truck, a message was displayed on the dash to clean the radar sensor. I thought of pulling over in a safe spot to clean it up. At the same time, "front collision off" and "brake system" icon lite up. The road also changed from downhill to uphill. Suddenly, the vehicle started swaying in my lane, towards the semi-truck wheels and towards the guard rails. I was able to control the steering and come to a stop. That was a near death experience. I got my breath for a minute and cleared the radar sensor. After cleaning the radar sensor, the vehicle was driving fine going up and down the rolling hills of iowa. Concern: why a blocked radar sensor should impact the braking system? I understood the impact to adaptive cruise control and front collision features. Are the traction control, abs, or some other system disabled due to malfunction of the radar sensor? can the radar sensor wires being bad disables the braking ability? information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While at a stoplight, my car notified me of many sensors having "problems" from my understanding, it relates to the front camera located on the windshield. I am unable to use these additional safety features since the problem arose earlier this week. Had this gone out while I was driving, my family and I could have been fatally affected. My cursory research online shows this is a recurring problem that customers need to address independently. All expenses are paid from their own pockets. There were no warnings prior to the system's failure. I have not taken my car in yet for this to be addressed. I am frustrated that this is a known issue with no proactive solution by a brand I had trusted.

The manufacturer has not solved in a timely matter the open recall since November 2023.

While driving at highway speeds with the adaptive cruise control engaged, the vehicle detects vehicles to the right (same direction of travel) or at times vehicles to the left (opposite direction of travel) and abruptly applied backing. No vehicles will actually be in lane of travel of the vehicle to cause action. On a 87 mile drive (one way to work) happens more than eight times on first drive and over ten time on second drive. Vehicle has under 1500 miles on it and was purchased brand new. Taken to Acura and told to turn off lane departure system unless in city traffic. System turned off and did not correct issue. The abrupt braking causes drivers behind to abruptly brake, increasing risk of crash, and also angers them because they think you are �brake checking� them. Weather was cloudy or clear.