2020 Acura RDX electrical system problems

“• The Media Oriented Systems Transport (MOST) bus network / FAKRA coaxial service cable connectors failed. This failure directly controls the primary infotainment assembly and the central safety display screen. The vehicle and its active components are currently intact, fully operational (with the defect present), and available for inspection upon request. • The hardware defect causes sudden, unpredictable total blackouts of the central display screen while driving. This completely disables the safety rearview/backup camera and mutes vital audible driver-assist safety alerts. Additionally, the defect causes extremely loud, jarring, and distracting popping and crackling noises through the audio speakers while moving, creating an immediate driver distraction and safety hazard on public roads. • Yes. The vehicle was brought to an authorized Acura dealership service center, where the active symptoms (crackling audio and system instability) were documented. Furthermore, the issue perfectly matches the diagnostic criteria of Acura's official technical service campaign (TSB 23-025). • The vehicle has been inspected at an authorized Acura dealership service department…”

“I am reporting recurring water intrusion into the driver-side passenger compartment of my 2020 Acura RDX following significant rainfall. This has occurred multiple times. The most recent incident occurred on August 28, 2026, following heavy rainfall. Water entered the vehicle and accumulated on the driver-side floor, leaving the interior floor in a puddle. I documented the water intrusion with photographs and video and submitted that documentation to my automobile insurance company as part of a claim. The vehicle was not being driven through standing water; the intrusion occurred after rainfall while the vehicle was parked. The vehicle has previously been inspected by North Park Lincoln of Dominion, where I purchased the vehicle. Despite the prior inspection, the vehicle has continued to experience water intrusion into the driver-side cabin following significant rainfall. The recurring water intrusion raises concern that the panoramic sunroof drainage system may not be adequately draining or preventing water from entering the passenger compartment. Water entering the cabin can reach wiring, electrical connectors, control modules, and other electrical components…”

“I am reporting recurring water intrusion into my 2020 Acura RDX following significant rainfall. The first water intrusion resulted from heavy rainfall in April 2026. I did not discover the water inside the vehicle until May 1, 2026, when I found water accumulated on the driver-side floor. I filed an insurance claim after discovering the damage. Following the May 1 discovery, Gunn Acura, where I purchased the vehicle, inspected it. The dealership found the panoramic sunroof drainage system had a kinked/clogged drain line that was not properly allowing water to drain. The dealership also identified corrosion affecting wiring harness components and recommended repairs including replacement of the moonroof drain tube, carpet removal/cleaning, and replacement of affected wiring harnesses. Following another heavy rainfall on June 15, 2026, water again entered the vehicle. The water intrusion has resulted in electrical concerns, including warning messages and electrical abnormalities. Water entering the cabin can reach wiring, electrical connectors, control modules and other critical electrical components, creating a potential safety risk. The vehicle and affected…”

“The vehicle’s keyless access/security and body control system malfunctioned. An authorized Acura dealer previously diagnosed water intrusion from blocked panoramic sunroof drains, including water reaching the Body Control Module (BCM) Multiplex Control Unit. The dealer reported that this was causing false security alarm activation and battery drainage and recommended BCM replacement. The vehicle and affected components are available for inspection upon request.The condition has since escalated. The security alarm repeatedly activated without cause and became difficult or impossible to silence. The dashboard displayed, “Keyless Access System Problem\. See Your Dealer.” During the latest episode, the engine spontaneously started without an authorized remote start command, and attempts to stop the engine were unsuccessful. The 12-volt battery was therefore disconnected to disable the vehicle and will remain disconnected until the vehicle is taken to the Acura dealership for diagnosis. This created a safety risk because the vehicle demonstrated unintended engine operation and loss of normal control over engine shutdown, creating potential risks of unintended…”

“My RDX experienced a water-intrusion failure involving the panoramic sunroof drainage system and associated electrical components. An authorized Acura dealer diagnosed the right-front sunroof drain as backed up/overflowing, allowing water to reach the Body Control Module (BCM/Multiplex Control Unit). The dealer attributed abnormal security-alarm activation and battery drain to the water-damaged BCM and indicated that the BCM required replacement. The dealer also identified a blocked right-rear sunroof drain that allowed water to reach the tuner, causing radio/stereo malfunction and requiring tuner replacement. The water intrusion reached critical electrical components and caused unpredictable electrical behavior, including unexplained security-alarm activations, exterior lights remaining illuminated, complete battery discharge, loss of keyless access, and ultimately a no-start condition that rendered the vehicle inoperable. After the battery was depleted, I had to use the manual key to enter the vehicle. This created a risk of being stranded and raised concerns about the reliability of the vehicle’s electrical systems. There were no known dashboard warning…”

“One day last December it rained very hard for a couple of days. It about 6:30pm I got in my car to go to an appointment. There was water inside the cab, on the seats, inside of the windshield, in the dashboard and controls... and about 4 inches of water on the floor on both passenger and driver side. When I tried to start the car, all the electrical systems went haywire. Everything was blinking at me in the dashboard many different warnings and hazard lights. I took the car to the dealership for service. I was by service department told that drainage lines on the top where the sun visor is were clogged up and the water had backed up into the vehicle. This was no fault of my own. I have maintained this automobile with Acura only for 6 years, since I purchased it. This is serious, even though it was resolved by clearing the lines but the damage to the electrical system were extensive. Now that the lines are cleared who's to say this will not happen again? Will my car flood again someday? I believe this to be a design flaw and should be corrected by Acura as a possible. I believe it should be a recall, it could affect the safety of the driver and passengers.…”