Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2019 Acura RDX owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2019 Acura RDX. The contact stated while driving at an undisclosed speed, the contact attempted to use the horn however, the horn was inoperable. The contact stated that while attempting to engage the horn, the horn failed to function properly or make a sound. The vehicle was taken to the dealer, where it was diagnosed that there were internal parts located in parts of the horn that needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 63,220.
I was driving on the highway and it was raining. I tried to pass another car so I started to accelerate. But during my attempt to accelerate, my 2019 Acura RDX would not respond to throttle response. So I slowly started to loose speed the car. The engine warning light started to flash and the car came to a stop on a dangerous road construction area with no medians. I had to turn on my hazards and wait ON THE ROAD at night. I quickly turned off the engine and tried to turn the engine on again. When I turned the engine on it no error codes were shown and the check engine light was gone. I started to drive again and was able to get to a service road. After a while I decided to try to keep driving so I could get home and when I was merging into the highway, it happened again. …
Component Failure & Inspection: The rear windshield glass spontaneously imploded/shattered. This is a documented manufacturing defect involving the rear defroster grid, as detailed in Acura Technical Service Bulletin (TSB) 22-014. The vehicle and the shattered glass are currently available for inspection. Safety Risk: The glass shattered while the vehicle was occupied, spraying shards of tempered glass into the cabin. This posed an immediate risk of laceration and eye injury to the occupants, as well as a significant distraction/startle hazard that could have resulted in a collision if the vehicle were in motion. Confirmation: The failure was inspected and confirmed by McGrath Acura of Westmont on February 27, 2026. The dealership acknowledged the existence of TSB 22-014 and the defect in the defroster grid but has not yet provided a full remedy. …
Vehicle: 2019 Acura RDX (Technology Package) I am reporting a serious safety issue involving sudden loss of engine power while driving. On March 14, 2026, I filled my gas tank before traveling approximately 1.5 hours out of town. The vehicle operated normally that day. The following morning, during snowy and icy conditions, while accelerating in traffic, the vehicle suddenly lost power and stalled. Multiple warning lights illuminated on the dashboard ("Christmas tree" effect), and the steering became very stiff, making it difficult to safely maneuver the vehicle out of traffic. I was able to restart the vehicle, but warning lights remained on. The next day, while driving on the highway under normal conditions, the same issue occurred again. While accelerating, the vehicle suddenly lost power and stalled in traffic, creating a dangerous situation. …
on 2/3/22, after only 12 hours of owning the vehicle, I merged onto 287 South and upon speeding up and merging into the center lane, I lost all acceleration and my dash lit up like a Christmas Tree. An 18 wheeler was coming behind me in the middle lane at 65 mph while my car slowed down to 25 mph. I was thankfully able to get over to the side of the road without being hurt or even killed. Upon bringing it into the dealer, the codes showed that it was a bad engine coil and spark plug. This was repaired under warranty. Fast forward to 5/16/22, I exited the highway, came to a complete stop at a red light. Upon the light turning green, I went to accelerate and limp mode activated again. I have video of the incident and dealership is unable to find any issues with the vehicle. Both times it was either raining or had just stopped. …
Once again, 3 weeks after the first time it happened, my 2019 ACURA RDX lost ALL power and I had to drift to the side of the road. This occurred on the Baldwin Beach Express and luckily there is not a lot of traffic this time of year so I could get on the shoulder. Car would not restart, all lights around the speedometer had come on. I had to have it towed to the Acura dealership in Mobile where it was towed the first time when this happened. At that time the told me they could not duplicate the problem. Three weeks later it has happened again . The tow truck driver tried to start the car and said " you're not getting any fuel" and asked if the fuel pump had been checked. Supposedly it has been replaced when it was first recalled. Could it be another faulty fuel pump? My question....how dangerous would this be if this happened in the I-10 Mobile tunnel?????? …
The center infotainment display went completely black, with only the backup camera feed still functioning. There was no audio output at all (radio, navigation prompts, or Bluetooth). The dealer diagnosed and replaced the FAKRA service cables under Acura TSB B23-025, which addresses this exact display-blank/audio failure. After the cable repair, the screen remained black and audio remained completely non-functional. The dealer then determined the tuner/AV control unit had failed, confirmed by swapping in a working unit from another RDX which restored function. Acura Client Relations was contacted and declined to provide any coverage for the tuner unit replacement, stating the TSB only covers the cables themselves, despite the failure occurring immediately downstream of the covered repair. …
I am writing to report an incident involving the rear window of my2019 Acura RDX that shattered unexpectedly. The incident occurred while the vehicle was parked at my workplace. I was notified by a co-worker that the rear window had shattered. Upon inspection, there was no obvious sign of a collision, vandalism, or other event that would explain the damage. A glass replacement company was called to my workplace to replace the shattered rear window. After examining the vehicle, the technician advised that there was no evidence of an external impact, such as a rock strike or other object, that would have caused the glass to break. Because the window appeared to shatter without any apparent outside force, I am concerned that this may indicate a defect in the rear glass or its installation. …
Transmission intermittently gets stuck in a gear while driving and will not shift until car is powered off and on again. Brake system, LKA, power steering, vehicle stability/traction control, hill assist, cruise control, collision mitigation, and road departure mitigation intermittently stop working and error. Infotainment and audio intermittently error or get stuck on after powering off vehicle. Trunk randomly opens when no one is in range of the vehicle. Horn randomly sounds for approximately 30 seconds on hot days after vehicle is stopped. Engine cylinder heads, transmission, and horns have been replaced without resolution. MOST bus system has been replaced twice without resolution. All issues have been recorded on video and documented with the local Acura dealer and Acura Client Relations, but neither has been willing to help reach a resolution.
While driving in the rain, after an hour long drive home from Philadelphia back to Reading, taking [redacted] and [redacted], I accelerated my vehicle while going around 50 mph and immediately was faced with a blinking check engine light and lost the ability to accelerate. My Acura essentially went into, what others call, limp mode while in sport mode. I filled my car with 93 gas around 20 minutes before this. After losing acceleration, I pulled over on the highway and the check engine light disappeared. After which, I still was unable to accelerate after leaving the car in park. After I turned the car off and turned the car back on maybe 30 seconds later, I was then able to accelerate and found no issues afterwards.
Electrical complaints in other RDX years
Frequently asked questions
How common are electrical problems on the 2019 Acura RDX?
NHTSA has 39 complaints about the electrical system of the 2019 Acura RDX, 9% of the model year's 440 complaints. The component named most often is horn (1 mentions).
Is there a recall for 2019 Acura RDX electrical problems?
No. NHTSA lists no electrical system recall for the 2019 Acura RDX, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2019 Acura RDX electrical problems start?
Half of the complaints with a recorded mileage happened before about 6,000 miles, and 85% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.