While accelerating and switching lanes on the interstate around 70mph the car reduced power and then downshifted and revved up to over 4K rpms. The car would not accelerate with foot all the way into it and reduced speed to 50mph. Emissions system error, transmission problem error, sh AWD error and blind spot assist error were all illuminated.

- Huntersville, NC, USA

In different settings I have experienced a lag or hesitation when I press the accelerator. The hesitation is sufficient that it makes it dangerous to shift lanes at highway speeds as well as to turn left at a stop sign on a local street. I have disengaged the auto-idle feature to minimize the issue at stop signs and I am now driving in sports mode 100% of the time because this minimizes the hesitation; however, it is necessary to "gun" the engine to ensure that the hesitation does not result in a major accident. I have discussed the issue with the Acura service department each time I have brought my car in for an oil change over the past 1.5 years, and they deny that there is an issue with the power train. I do not allow other members of my family to drive my MDX as I fear their inexperience with the transmission problem will result in a major car accident.

- West Linn, OR, USA

While driving on the highway the "transmission system problem" illuminated on the dash board. The "D" light also began flashing. In addition another warning light came on that said "blind spot warning malfunction". the car slowed down. It would not go faster than 15-20 mph on the highway while the RPM's surged to over 4,000 RPM. The car had to be towed to the dealership yesterday. As of today they still have not been able to identify why this happened. I believe this is a significant safety issue that put myself and other drivers at risk. Any time a car does this without explanation on the highway warrants an investigation.

- Township Of Washington, NJ, USA

The car rpms do not keep up with the speed. When decelerating in traffic rpms remain high and the car surges forward. Going down hills when taking foot off the brake the car surges forward. When sitting at a stop sign and starting again the car would surge forward. The engine is very erratic and the software updates do not remedy the situation. Very scary driving the car. Cold weather makes the symptoms worse. Need to warm up the car a minimum of five minutes. It is very sluggish in the cold and the surging is more prominent. Not good if you live in cold climates. I need to drive through a residential area of a city with children crossing the street. I am afraid if the car surges when I break there may be an accident with a pedestrian or I may rear end the car in front of me. I have another appointment with the dealer to address the problem. Looking to trade in the vehicle with a different transmission. This vehicle should never be resold!

- Avon, CT, USA

The transmission on this vehicle is unsafe & the car surges uncontrollably driving downhill. My wife & I can no longer drive this car & our local oakland, ca Acura dealer has not corrected the problem - we have taken it in for correction several times. We have 3 kids so we can't drive around in an unsafe car & dont want someone else driving an unsafe car. Acura recently issued a warranty extension on this issue - this car is leased & we want to turn it in now. Please assist. [xxx] - [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).'

- Oakland, CA, USA

I was mailed a letter about a warranty extension for my associated VIN. I definitely have experienced associated issues with my MDX. After calling the Acura dealership on 11/24/17, I was given an appointment for 11/28/17 and I was told they would inspect my car over 2 days and provide a loaner car. My experience was "to say the least" the inverse; extremely disappointing. The service technician took my car for a test drive and told me nothing was wrong. In addition, the service team was extremely unprofessional as once again, the customer was wrong. Please advise about the next steps for service. I am extremely disappointed with Acura unwillingness to listen to the customer. I did take the car for service associated with this issue about a month prior. Overall problem is many times I experience shifting and accelerating hesitation that is jerky. Which indicates a problem with the transmission: This is what the warranty extension states.... the transmission shifts poorly.

- Allentown, PA, USA

We bought a new MDX 2016 and the car was acting very strange.the powertrain was off, 30000 miles engine was out in the middle of the road, noises everywhere. It is in the shop now and it has been 2 months now since repair.it is still in the shop and it has been over 2 months.

- Irving, TX, USA

As the vehicle is moving at 60 -70 mph and you decelerate or reduce acceleration the RPM goes to zero, car cannot accelerate and you do not control over acceleration in moving traffic. If the car iis coasting and not able to have a stable speed with moving traffic this is can be dangerous. Suddenly, the transmission will engage with a sharp engagement (metal sound) of the transmission after about 6-10 seconds. I complained to the dealer as this has happened several times. They said they could not help me since there was nothing wrong at the time of inspection and they have not heard about this problem. Last week similar situation occurred except the dashboard error lights showed sh-AWD, emissions, transmission problems and rear side warning indicator fault. I had to pull of onto the side of road. Once in park the car would only go into sport mode in first gear. Called Acura roadside assistance and they towed to a local dealer. Next morning they said it was ok. Once they tested via diagnostics they said there were errors in the transmission modulator. Hope this fixes the problem. Car has 36K miles on the odometer. The dealer was very helpful and helped me get temporary transportation to my home city 4 hours away. Other people on the internet are having similar problems that have occured to me. My biggest concern is once the car is out of warrantee this becomes my problem not the manufacturer. What recourse do I have if this a design or quality defect for me and other consumers. Current repairs have being completed and unknown if this problem will occur at future date.

- Cumming, GA, USA

I got in my car this morning an as soon as I put it in reverse, it lurched forward before finally moving backwards (there was no slope). Then, as I approached a traffic light on a city street and applied the brake, the car felt as though it accelerated slightly before slowing down.

- Los Angeles, CA, USA

Un intended non acceleration. Due to severe lag, delay, and sluggish transmission response. Acura has replaced my transmission under warranty at 11,000 miles and did not admit fault and say there was a problem. Here's more on my experience..in my 1 year of ownership.. to whom it may concern: 2016 Acura MDX 13,000 miles, purchase new from Sierra Acura, alhambra, ca I am writing to request buy back of my vehicle this car is a lemon. Since taking ownership a year ago, my 2016 MDX purchased new has experienced nothing but one problem after problem. Acura replaced transmission a month ago but the problem is still there. Is it engineered and designed to perform in a not safe manner " many times I experience shifting and accelerating hesitation and jerky/jolting. My family and I do not feel safe operating and riding in this vehicle. Several times gas pedal depressed and vehicle lagged at 20 mph for more than 10 seconds before accelerating. A few of the latest new and ongoing problems are below. Driver door now appears off set and at different angle protruding out now. Appears that the door is not closing properly and therefore not sealed at closing. Furthermore every single window has experienced faulty mechanisms with motors, actuators, and seals. When closing the doors it feels like the windows are loose. There are also squeaks and rattles eminating throughout the cabin area. I secured and collected all loose items and the sound is still there. At engine start up each time, there is a high pitch whining noise for a few seconds before engine starts (perhaps something else faulty") I have video / sound documentation of this with 2 seperate recording dates. With regard to the navigation, multimedia unit, it has been lagging, slow (er) to function, and severe delay in backup camera actuating, and audio functions delay in response sometimes.

- Arcadia, CA, USA

Hi, I bought a MDX 2016 from autonation Acura last year. I had a problem with the car this week. When I was driving(moving), merging onto a freeway, as the traffic was more, it was slow merge, suddenly I was not able to accelerate as the transmission moved to "neutral" from "drive" automatically. I don't think this is normal behavior and I did not touch the gear buttons or steering wheel shift paddles. This could be a problem with car and its dangerous issue. I was lucky that the traffic was slow moving and I did manage to push to drive again and accelerate. What if this is on a fast moving freeway. Thanks, [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Cupertino, CA, USA

Engine does not start and all the warning lights come up on dashboard. After a few seconds, each of the system comes up as failed. Dashboard shows as acc failed, lane warning failed, emission failed, engine check failed. This is a second failure in last 45 days. First failed on Nov 20 and car was in service till Dec 21. Again the engine failed on Jan 02, not allowing to start at all.

- San Ramon, CA, USA

While in transit with just 15000 miles on the car the transmission system problem light illuminated. Car was immediately taken to dealer. This vehicle has a center console push button control for the transmission. The dealer said that there was residue in the controller most likely due to a spilled drink. The controller would need to be replaced and it would not be covered under warranty. To the best of our knowledge we spilled no drinks on the controller. However, what a poor design. The drink holders are right next to the controller! could a spilled drink cause the transmission to lock up based on this design?

- Lake Worth, FL, USA

There is no way to place the car in neutral without turning the engine on. Today I was at a gas station when a fuel pump malfunctioned and there was a fuel spill that needed to be cleaned. The procedure was to move the car without turning on the engine so they can access the area to clean up the spill. After speaking to my local dealer and to the main contact phone number for Honda North America, there is no way to get the car in neutral without the engine being on. This caused a significant delay in getting my car moved since a tow truck with a dolly was needed.

- Richmond, TX, USA

As I drive my car I experience very strange behavior from my 9 speed transmission. It occurs both while accelerating and decelerating. During deceleration: (1) by only taking your foot off the gas to decelerate creates transmission confusion (the car doesn't know which gear to be in), which can cause the car to lung forward or jerk backward (2) this also makes it hard to stop, requiring lots of extra brake pressure. During acceleration the car can feel unresponsive, which can prove scary when pulling out into traffic.

- Atlanta, GA, USA

We purchased a 2016 Acura MDX with sh-AWD. Within the first few weeks we noticed the transmission shifts were jerky and erratic. Most of the problems occurred when driving blow 40 mph. The vehicle also lunges forward unexpectedly when decelerating while your foot is off the gas pedal. It feels as if the car downshifts and you get some unexpected accelerating. We had issues with the transmission since the first few weeks, the dealership kept saying that it is an 'adaptive transmission' and will get better after time. After a few months, things only got worse. The transmission would make a loud metal on metal noise when starting the car up. The vehicle was in the dealership for almost 3 weeks before they could identify and fix the problem. They ended up replacing the entire transmission December 2015 and we had to go back to have the transmission adjusted as it was shifting so hard that you would hear a clunk. The vehicle has never been the same and it does not feel safe to drive, especially in the winter. We are very careful when coming to a stop because you never know if it will suddenly lunge forward. Now 8 months after having the transmission replaced, the same noise is coming back. The car is back in the dealership and they were able to replicate the sound again. However, now they are telling us that it's a characteristic of the transmission and that 40-50% of all MDX's with the 9 speed auto will develop this noise! they say it is due to the fluid building up at the bottom of the transmission and when it starts up the fluid gets pushed through all the gears. It sounds more like metal on metal to me and why was the noise not there prior and always develops after 6-8 months? I have not seen anything online regarding this noise that supposedly occurs to 40-50% of Mdxs.

- Maple Grove, MN, USA

I have purchased the vehicle on 3/23/16 and from day one I have been having issues with the transmission. When I come to a stop and wait for oncoming traffic to give me chance to cross the street. When I finally get the chance to cross I press the gas pedal and the car just does not want to go, it stalls. Same issue when getting on the highway waiting for a chance to get in but the car does not want to. It is an safety issue for everyone because I do not know if the car will respond and if it does not I can cause other vehicles to crash into mine. Another issue just came out yesterday I just got home and was parking the car on my parking lot which is flat. While parking and shifting from reverse to drive the car just would not move forward at all and a light came out shift to park so I did and then when I shifted to reverse the car would accelerate rapidly. I have that several times and every time would do the same did not go forward at all and reverse rapidly. I have recorded the whole issue on my phone and brought it to the dealer. They have told me that they never have seen this problem and they will stay with my new car for about one week. Something should be done with transmission issue before anyone gets injured or killed. Definitely did not expect that from a $54,000 luxury SUV. I had traded my 2009 Acura MDX for this huge problem, what a mistake.

- Chelsea, MA, USA

Transmission failed. This 9 speed transmission has a fluid heater in it that has radiator water supplied to it. Car was not shifting correctly and making a beeping noise at 20 to 25 mph. Car was taken to dealer on 06/11/16 with 8,800 miles on it. They called to tell me that the 2 way valve between the coolant and transmission was faulty and coolant got into the transmission. Acura told them to replace the transmission entirely. Will take 2-3 weeks. Have been having issues the entire time we have had the car. When taking off the car does not accelerate quick, in fact, tends to stall then lurch. Have had issues with the sensors coming on, not sure if this is related to the transmission, but is a continuous issue.

- Lorton, VA, USA

Transmission failed causing engine to overheat. This 9 speed transmission has a fluid heater in it that has radiator water supplied to it. Car was not shifting correctly and making a beeping noise at 20 to 25 mph. Car was taken to deal on 2/13/16 with 5,635 miles they test drove and said they could not find anything wrong. Same issues driving home from dealer. While driving car on 2/23/2016 with appox. 6700 miles engine light came on, smoke from under hood, display said engine overheated and appox. 1 quart of light blue fluid leaked out from under car. Towed to dealer, they said transmission heater(not cooler) ruptured, causing the transmission fluid and engine coolant to mix and this is what caused overheating. Tthey are ordering a new transmission with at least one week down time.

- Gilbert, AZ, USA

I bought my 2016 MDX on 02/01/2016 and was quite happy with the initial purchase. After driving for two days I started setting up the car's options, I realized that the cars drive system was set to start in sport mode. I changed the option to allow the car to start in 'normal' mode permanently and that's when I started to feel the problem. There is a noticeable 2 - 3 second lag at take off or when attempted to accelerate from a reduced speed in lower gears. A very uncomfortable feeling when attempting to make a left turn when you have oncoming traffic and the car falls to engage after you make the commitment to drive. I waited a few days to see if this was just a kink that would go away since the car was new. No such luck. I took the car to the dealer and they said everything was fine. I asked about the lag and they said it is normal operational part of the car. Apparently this is a known issue with the car for which they don't think it is worth looking into. The salesman actually told me he has the same model and it's just something you have to get used to. I guess this will only be addressed when someone gets killed making a turn and don't get the power they expect. I had this issue in a new 2007 Camry I bought a few years ago and they were able to get it fixed with an update to the computer system on board. I don't know why Acura has taken this stance and hope you guys can get them to address this issue.

- Pembroke Pines, FL, USA