2020 Acura RDX problems

Filed Oct 28, 2026 · WA

I own a 2020 Acura RDX SH-AWD Advance, VIN [XXX], about 80,080 miles. On XXX, the rear windshield shattered with no external impact, with glass caving into the cargo area. No crash and no injury occurred, but shattered glass in the cargo area and loss of the rear window is a safety concern for occupants. Acura Service Bulletin 22-014, version 3, XXX, covers 2020 RDX AWD vehicles in VIN range 5J8TC2H..LL000001 through 5J8TC2H..LL039430 for rear windshield shattering with no external impact, caused by incorrect specification for the rear defroster grid. My VIN [XXX] is inside that range. I filed a goodwill claim with Acura Client Relations, cases XXX and XXX. Acura's only written reply was XXX, requesting a dealer diagnosis. Assessment photos were sent to Acura on Wednesday morning, XXX. Since then, contact has been scarce. Messages left for Acura went unreturned, callbacks when they came were unintelligible, sounding like speakerphone, and another dealership also struggled to reach my case worker, [XXX]. On XXX, [XXX] told me verbally that my claim was denied, said no warranty is available, and refused to send the denial in writing. I replied that I know warranty is not available, which is why I filed a goodwill claim. [XXX] told me to file with the federal safety agency. A supervisor call is scheduled for Friday, XXX, after 12pm. I have received no written denial, no written reason for the goodwill denial, and no payment or reimbursement from Acura for this defect. This is the 2nd time in 11 months of the back window caving in with no impact. XXX was the 1st incident I had. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 27, 2026 · PA

My back window shattered while in driveway when tempature had slightly changed

Filed Oct 25, 2026 · Visibility · IL

The back hatch window suddenly shattered without anything hitting it, doors slamming, etc. just randomly shattered.

Filed Oct 7, 2026 · Engine · 75,000 miles · CT

The contact owns a 2020 Acura RDX. The contact stated that while driving 40 MPH, the vehicle lost automotive power. The vehicle was towed to a dealer where it was diagnosed, and the contact was informed that the head gasket had failed and that the engine and head gasket needed to be replaced. The manufacturer was notified of the failure. The failure mileage was 75,000.

Filed Oct 6, 2026 · Engine · OR

The vehicle had 84400 miles at the time a blown head gasket was diagnosed by a Honda factory dealer. Was told not to drive vehicle further as sudden and catastrophic engine failure could occur. Unexpected and sudden engine failure at moderate to highway speeds, can create serious safety issues for passengers, nearby vehicles, and pedestrians. The vehicle has been serviced as scheduled at the local Honda factory dealer since new with supporting receipts. No engines repairs had been made to the vehicle since new. The issue was identified when the car was in for routine scheduled maintenance and I asked the dealer to check for the cause of momentary rough idle at engine startup. No diagnostic codes were set or found. This relatively new low milage vehicle has never overheated or been exposed to driving conditions that one would expect to be related to a blown head gasket. During repair, no issues were found with either the head or block. The master technician indicated it appeared the head gasket was faulty and failed.

Filed Sep 30, 2026 · Electrical · MA

• 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 to initiate a corporate claim. However, because the vehicle is just 345 miles past an arbitrary 100,000-mile warranty extension threshold, Acura Corporate has refused to perform the physical repair, meaning the defective factory components are still currently installed in the vehicle. • There were no traditional dashboard warning lights or error codes prior to the failure. The primary symptoms are loud audio popping, crackling noises, frozen screen menus, and sudden display blackouts. These symptoms began appearing intermittently and escalated in frequency as the vehicle approached its current mileage of 100,345 miles.

Filed Sep 9, 2026 · Transmission · FL

Transfer case is leaking. Then the engine overheated. Confirmed and inspected by the dealer. No warnings prior to the incident.

Filed Aug 30, 2026 · Body, Electrical · TX

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 components are available for inspection upon request. I have dealership documentation of the kinked/clogged drain and recommended repairs, as well as insurance documentation related to the water intrusion. I am reporting this because a failure of the panoramic sunroof drainage system has resulted in repeated cabin water intrusion and potential damage to critical electrical components. I believe this may represent a recurring safety-related defect rather than ordinary water leakage.

Filed Aug 30, 2026 · Body, Electrical · TX

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 located within the vehicle and could potentially cause electrical malfunction or other unsafe conditions. The most recent water intrusion is documented, and the vehicle and affected components are available for inspection upon request. Photographs and video documenting the August 28, 2026 incident were provided to my automobile insurance company. I am reporting this because the water intrusion has occurred repeatedly and I am concerned that this may represent a recurring safety-related defect with the 2020 Acura RDX panoramic sunroof drainage/water management system rather than an isolated incident. There were no warning lamps or messages specifically preceding the August 28, 2026 water intrusion. The primary symptom was substantial water accumulation on the driver-side floor following rainfall.

Filed Aug 22, 2026 · Electrical, Engine · FL

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 operation, exhaust carbon monoxide exposure if this occurred in an enclosed area, and battery depletion. The dealer has confirmed the water intrusion and BCM security system malfunction. However, the unauthorized engine start and failure to shut down event occurred after that diagnosis and has not yet been evaluated by the dealer. Before the unauthorized start, symptoms included repeated false alarms, battery drainage, documented water intrusion, and the Keyless Access System warning. The warning was photographed at approximately 81,416 miles during the same period of escalating electrical security problems.