2020 Acura MDX Driver Assist & ADAS Problems

Add Auto High Beam problem to the above Adaptive cruise control, lane keeping assist, and collision mitigation. Suddenly got several warning popups and persistent warning lights on related to the identified issues. We just replaced the battery a few months ago, and didn't have any of these problems until this week. Now, it happens every time we start the vehicle. We did the Recall software upgrade. I suspect these problems are related to that software upgrade. Many people online report identical problems without solutions. Please advise RE next steps for how to resolve.

The front camera mounted under the dash stopped working, prompting all of these systems to fail.

I drove my car in the morning and parked it in the lot for about an hour. After I came back and started my car, the following multiple safety systems displayed on my dashboard at the same time: - Lane Keeping Assist Problem - Collision Mitigation System Problem - Road Departure Mitigation System Problem - Auto High Beam Problem - Adaptive Cruise Control Problem When I took it to the dealership on the same day to diagnose this, they came back and said it was an internal failure with the camera and quoted me around $2200 to replace and recalibrate the camera. These lights just came on out of nowhere, I had no repairs or modifications with my windshield and there were no accidents of any sort. This appears to be a widespread problem among 2020 Acura MDX vehicles with similar camera modules. A malfunctioning front camera can prevent the vehicle from automatically braking or maintaining lanes, hence increasing the risk of collision. I am requesting that NHTSA investigate the front multi-purpose camera system on the 2020 Acura MDX for potential defect and safety hazard.

While driving my 2020 Acura MDX with 29,647 miles, all AcuraWatch safety systems suddenly failed at once, including Collision Mitigation Braking System (CMBS), Lane Keeping Assist, Road Departure Mitigation, Adaptive Cruise Control, and Automatic High Beams. Multiple warning messages appeared simultaneously. This disabled forward collision warning, automatic emergency braking, and lane departure/lane keeping functions, creating a serious safety risk. The dealer inspected the vehicle and confirmed an internal failure of the multipurpose front camera/radar unit, and recommended replacement of the entire assembly. The repair estimate is 2,200. The dealer stated the component has failed and cannot be repaired. This issue is widely reported by many Acura owners of similar model years, and appears to be a recurring defect. The failure occurred without any impact, damage, or modification. The vehicle is available for inspection. The symptoms began suddenly and all warnings appeared at the same time. Because this failure disables critical collision-avoidance and lane-keeping systems, it presents a significant risk to the driver and others on the road. I believe this should be investigated as a safety defect.

All the sensors are blinking with no damage done to the vehicle no Cruz Control no abs no lane departure and more all sensor is not working

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.

UKNOWN ACC,LKAS, brake system warning lights intermittently come on. Started around 25000. More persistent now. Dealer advisor checked windshield/wiped over where the camera is and since it was not on at the dealership no problem found. Just stated the camera is funky sometimes. Vehicle has 59000 now. Not sure exactly what components are effected but the safety features of the vehicle no longer work properly such as the breaking warning.

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.

This is a safety-related defect involving the multipurpose front camera used for Advanced Driver-Assistance Systems (ADAS) on the 2020 Acura MDX. The multipurpose front camera failed without warning, resulting in the simultaneous loss of multiple ADAS safety features, including (but not limited to) Lane Keeping Assist, Adaptive Cruise Control, Collision Mitigation Braking, and Road Departure Mitigation. These features are integral to the vehicle’s active safety systems and driver awareness. The failure required full replacement of the front camera assembly. The total repair cost was approximately $2,300, which I was required to pay out of pocket because no recall or extended warranty coverage was available. This failure creates a significant safety concern because: * The loss of ADAS functions occurred suddenly and without driver fault. * The driver may rely on these systems for collision avoidance, lane control, and adaptive braking. * The vehicle remains drivable, but with materially degraded safety capabilities compared to its certified design. * There is a risk that drivers may not immediately recognize the loss of functionality or may assume partial systems are still operational. After experiencing this issue, I discovered numerous reports from other Acura MDX owners describing identical multipurpose front camera failures, often at similar mileage, with similarly high repair costs. This suggests a potential systemic defect rather than isolated wear or misuse. I respectfully request that NHTSA review this issue to determine whether this represents a safety-related defect requiring investigation and possible recall. Given the role this component plays in multiple safety systems, I believe this issue warrants formal evaluation.

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.

2020 acura mdx tech package with 31600 miles, I purchased this vehicle first owner in march of 2021 and about 3 days ago 5/22/25 I get a fault reading for collision mitigation system problem, lane keep assist problem, road departure mitigation system problem, adaptive cruse control problem and auto high-beam problem, all safety feature issues, I brought vehicle to Acura dealership and they scanned for error codes which produced error code#u3000-49 for faulty multipurpose camera unit millimeter wave radar internal electronic failure recommend to replace the wave radar, dealership states vehicle is no longer under warranty and would cost a total of $1500 to get repaired and replaced , this issue should be looked into further for faulty acura part if repair is done what are the chances of it happening again with normal usage of vehicle.

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. **How 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

On two separate occasions (December 2022 and April 2023), the Collision Mitigation System (CMS) of our 2020 Acura MDX improperly engaged. On the first occasion, the CMS abruptly engaged the braking system without warning. There was no car in front of the car, but there was a car in a turn lane to the right of the car. There was no reason for the system to engage. Both the driver (my wife) and the passenger (daughter) reported back pain from the incident. The driver received physical therapy for the event. The dealer (Gary Force Acura) and Honda America were notified. The dealer examined the car and found no issues or failures. On the second occasion, the car was changing lanes at a slow rate of speed while approaching an intersection and a stopped car well in front of the Acura. The CMS again abruptly slammed on the brakes in a manner not corresponding with the risk or danger of the situation. A collision with the car behind our car was fortunately avoided by the driver of the other car. The violence of the braking system caused damage to the braking system. No injuries were incurred. Again, the dealer and Honda America were notified, and the car was again examined. No issues or failures were identified outside of the brake repair. On both occasions, individuals were put at risk. The dealer was not able to reproduce the problem. The dealer said a CMS warning to brake should have come on before the CMS engaged. On both occasions, no warnings were observed until the actual braking event started. We are not comfortable driving the car, particularly with a student driver in the family. In most cases, we turn the CMS off before driving the car. The intent is to dispose of the car due to concern associated with the CMS.

The contact owns a 2020 Acura MDX. The contact stated while driving approximately 40 MPH, the collision mitigation braking system inadvertently activated. There were no warning lights illuminated. The contact had since deactivated the collision mitigation braking system. The contact stated that the failure recurred several times. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 19,725