On July 20 2021, I was driving at 45 mph when I pressed the accelerator and the car did not accelerate while making a loud sound. I pressed it again and it repeated the behavior. Meanwhile the car became slower and slower. There were no warning lamps or messages. I stopped the car and after about five minutes, I restarted it and it worked as usual. However, the technicians at the dealership were unable to confirm the issue with the vehicle losing power while driving through a DTC check. They mentioned that there were no PGM-FI DTCS present and are not sure what component may have malfunctioned. It was so scary, I am afraid to drive this car. This issue is extremely dangerous because the car rapidly decelerated in the middle of the road. This could have easily caused a potentially fatal crash in traffic. It unsafe to drive this car knowing that this issue could repeat at any time without warning.

- San Jose , CA, USA

Vehicle went into limp mode while I was accelerating up to speed onto a highway crossing lanes and driving uphill. All acceleration stopped, and the vehicle quickly decelerated due to being on a steep hill. It was not raining at the time. I had moved into the leftmost lane, and luckily there was a left shoulder to pull the car onto. The check engine light came on and was flashing. I turned the car off and back on, and it started. There could have been a very bad accident.

- Beachwood, OH, USA

Driving on the highway ~ 70mph in a rain the vehicle had a loss of engine power and went in to limp mode. It was a harrowing experience in the bad weather with traffic and no place to safely pull to the side of the road. Vehicle would only crawl @ ~ 5mph. This is the second incidence in a year. Its a major safety issue. Acura says it cannot be fixed unless they can duplicate the problem with my vehicle. Highly unlikely that will happen. I pointed out that other owners of the RDX have had the same issues. Acura stated that they do not listen to online forums. This is a serious issue in my opinion that will one day or perhaps already has caused loss of life.

- Flat Rock, NC, USA

Three hours into a four hour road trip, we had been driving in the rain when needed to overtake a slow car in the right lane. Went to accelerate when car lost all power and a check engine light came on flash. Pulled over to the emergency lane and turned flasher on. Car had to be glided into the lane as there was little to no power when using the gas. Thankfully we had not passed the vehicle yet when we lost power and the car behind us had enough room to slow down. After turning the car off and on again check engine light went off and car had normal power again. We were able to drive it for the next hour without further issue. We will be bringing this into the dealer to have it inspected. Currently car has only around 18k miles on it and have never had this issue before.

- Memphis, TN, USA

I had moved to the left lane to pass a slow moving truck on th pa North East extension. When I had almost passed the truck my engine light began flashing and my car started to decelerate. I was barely able to get over to the shoulder. I had to turn the car off and restart it to get the light to stop flashing and get the car to accellerate. Fortunately it happened before I entered the tunnel.

- Upper Chichester, PA, USA

The contact owns a 2019 Acura Rdx. The contact stated that he noticed an unknown fluid leak coming from the vehicle. The vehicle was taken to the local dealer findlay Acura (315 auto mall dr, henderson, nv 89014, (702) 982-4100) where it was diagnosed with needing an unknown component to be patched. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 7,100.

- Las Vegas, NV, USA

Traveling 70 mph down interstate in light rain went too accelerate to pass a semi and the car not would not respond it started slowing down and the engine light began flashing. Very dangerous situation to go from 70 to 40. Very lucky we were not in a serious accident, the left shoulder was closed due to construction. Turned on hazard flashers and maneuvered to an exit and pulled over. We looked under the hood waited a few minutes and restarted. Seems fine now but reading online this is a common and dangerous occurrence. It seems that a high number of complaints mention rain in their experiences. Acura needs to be forced to do something before someone is killed or seriously injured (may have already happened).

- Hot Springs, AR, USA

I was driving down an expressway and had stopped at a traffic signal. As the signal turned green, I accelerated and as soon as the car was out of the intersection, it went into the so called 'limp mode' with all power gone. The car started to flash all lights like check engine, brake system, acc system etc. And I had to stop on the shoulder. Called emergency services and got the vehicle towed to dealership. It is a dangerous situation and I could have been hit from behind by other cars.

- Campbell, CA, USA

Issue with break hold feature. When brake hold button is on car will keep the brake on even when driver releases the petal. In addition the vehicle is defaulted so the engine automatically will shut off when brake petal is pressed all the way down. But often when the HVAC system needs to run it will start the engine while stopped. When this happens the auto brake releases and car starts moving forward. This has happened many times. Vehicle is stationary, brake hold is on, engine auto off is on and sitting at a traffic light. Engine is off but car is turned on. Ac starts which makes engine start, engine starting causes brake to release. The vehicle moves forward. It could crash into another car or run someone over. It happens a lot. Do I need to report each time it happens?

- Bristow, VA, USA

This is the second complaint for this vehicle, the previous complaint was assigned NHTSA id number: 11277657. Similar to the incident that was previously reported, while driving on a highway at a high rate of speed, attempting to pass another vehicle, the car went into limp mode, lost acceleration, steering became difficult, and the check engine light came on. Luckily, we were able to safely get the car into the right hand lane and pull off into the shoulder. We turned the vehicle off and when we turned it back on the vehicle operated normally. As with the previous incident, this occurred in the rain. The car was brought to the dealership and, as with the previous incident, we were told they could not duplicate this issue and the vehicle was returned to us. We were told that if the issue occurs again to bring the vehicle back to the dealership. As stated in my previous complaint, this is an extremely dangerous malfunction that could result in a serious accident. This time my two children were in the car. What is it going to take for Acura to find an acceptable resolution to this problem" how many of these malfunctioning vehicles are on the road??"

- Little Egg Harbor, NJ, USA

While accelerating through 50mph the car suddenly stops developing power and begins to coast down to a stop, regardless of gas pedal input. The vehicles 'malfunction indicator lamp', 'electric power steering (eps) system indicator', 'vehicle stability assist (vsa) system indicator', 'road departure mitigation (rdm) indicator', 'collision mitigation braking system (cmbs) indicator', and 'brake system' light illiminate simultaneeously. The center display rotates through these problems, advises to avoid heavy acceleration and high speed, and advises to see the dealership. This happened while merging into a lane on the highway and could have easily killed me. This car must be recalled. This car has been maintained on all required inspections, is run on 91oct gas, and was just in a certified Acura dealership less than a month ago for an unrelated issue.

- Audubon, NJ, USA

Driving on a wet day, looking to accelerate out of highway construction merge as traffic opened up, the vehicle went into what I now understand is a known problem (but no recall) called "limp mode." I felt a bump, almost like a gear shift. The car could not get over 40 mph. I was able to safely exit the highway. Park and restart. The issue seems to have vanished, as I have tested it with increasingly "aggressive" accelerations until I felt comfortable driving again on the highway. It was nonetheless very concerning. This can cause a major accident if it happens at an inopportune time. I have only ever used 93 gas. I've had the car less than 3K miles. It is a certified pre-owned with 23K total. The acceleration I tried was indeed a hard one, but that is what this car is for.

- Long Island City, NY, USA

On two occasions, when driving in wet weather at 50-60 miles an hour on a 2 lane road, I accelerated to pass a vehicle and the engine suddenly lost power, went into "limp mode" and the vehicle was unable to complete the passing maneuver safely due to loss of acceleration. Check engine light flashed continually as the vehicle coasted to an eventual stop. Pulled off road, turned vehicle off, and then restarted it after a couple minutes and the engine light was no longer blinking, vehicle was operating normally. Sudden loss of acceleration is extremely dangerous at highway speeds and could easily result in a collision.

- Avon, OH, USA

Driving at hwy speed, raining and accelerated past slow semi trucks, check engine light came on and vehicle went in to limp mode almost causing an accident

- Flat Rock, NC, USA

We have had the Rdx for 18 months and have put 5,000 miles on her. During this time the engine has stalled on us perhaps 6 to as 8 times; the stalls have been and worrisome, couple seconds. The stalls have occurred merging on the freeway, at intersections while making a left or just pushing down the pedal when your cruising. We have had several close calls. You don't want to be around heavy traffic when the stall happens. It is dangerous.

- Kirkland, WA, USA

Vehicle goes into a "limp" mode during high speed freeway driving with little or no power during heavy rain. This has occurred 5 times in the 1st 20,000 miles and dealer cannot find problem after 3 attempts. This is a very dangerous and potentially catastrophic situation. This has rendered the vehicle not useable due to the safety concerns.

- North Lima, OH, USA

6 hours into a cross country drive, my wife went to pass a line of slower moving cars in a designated passing area on US45 in Ms. As she push down on the accelerator at 55 mph, the car dropped into a lower gear as it accelerated to 60 mph, then bucked and when into limp home mode. The check engine light started flashing, with speed dropping rapidly towards 20 mph. She was able to get safely towards the side of the road, where she switched off the engine. A minute later, she restarted the engine. The check engine light was out, and the car responded as if nothing happened for the remaining 2 hour.drive home. I was able to pull 4 codes from the obdii system: P0300, P0301, P0304, and C1555. The first three are for misfire of the ignition system, while the last is for an incompatible scan tool. The car had half a tank of 93 octane gas, temp was around 90 with high humidity. The car has 25000 miles. This could have resulted in a serious mishap if there had been someone behind her attempting to pass also. There are several reports of the same thing happening to other 2019 Acura Rdx's on this reporting site, as well as on an Acura Rdx forum. Someone at the NHTSA needs to get Acura to get on the ball and fix this issue before someone gets killed.

- Pensacola, FL, USA

Was driving down the highway when my car lost all acceleration and a whole bunch of warning lights went on, steering became hard etc. Got it over to the side of the highway barely. Car wouldn't restart, go into neutral or anything. Apparently the dealership says the radar was fault and killed the car while I was driving it and there was no way to disable the radar. If the radar is faulty it will kill all propulsion and also throw multiple errors in the car creating a hazard for the driver. It seems like this should be a recall.

- Lafayette, CO, USA

Driving for 15 minutes engine stopped while going up a very busy bridge on I-10 - started shaking and flashing no brakes no steering contact dealer. Coasted to construction area on top of bridge as to not be hit by 18 wheelers. The vehicle was out of warranty by 1200 miles... that's ridiculous

- Sulphur, LA, USA

After a hard stop at a stoplight, when attempting to accelerate the car would not accerlate even when pushing hard and pumping on the gas pedal. Could hear the engine reving but would not go over 20 mph. Took it to the dealer the next day and they could find nothing wrong. Happened a 2nd time when attempting to pass a car. In that instance I recall speeding up to pass the car and once in front if it had to step on the brake due to a pending stop light. When attempting to accelerate again the car would not accelerate. Could hear the engine reving up, but the car would not go over 20 mph.

- Columbia, MD, USA