Speed control would not engage. This has happened before. Auto brakes engaged while driving down city street at 40 mph in outside lane of 4 lane road. No cars in front or immediately to my left. Fortunitly there were no cars/trucks behind me. Car came to suddened stop engaging the seat belts. After stopping I put put on gas again and drove 2 more blocks before I parked car for 2+ hours. Called dealership & drove to service department for repair. Dealer kept car overnight and said there were no issues they could find by driving or checking diagnostic computer records. So there was nothing they could do. These electrical issues have appeared and could not be duplicated in the past 20 months......1 - suddended emergency braking - 1X, speed control not engaging - 3 times, passenger side mirror not closing - 10+ times, car locking or not unlocking doors with key inside car - 3 times. Once will at airport and with car running.

- Weston, FL, USA

The contact owns a 2017 Acura MDX. While the liftgate was closing remotely, it forcefully closed and struck the occupant's body. The contact sustained head injuries that did not require medical attention. There were no warning indicators illuminated. The vehicle was taken to two local dealers: Autonation Volvo cars san jose (4600 stevens creek blvd, san jose, ca 95129, (408) 758-5501) and hopkins Acura (1555 el camino real, redwood city, ca 94063, 888-606-5810) where it was diagnosed that the vehicle was working as designed. The vehicle was not repaired. The manufacturer was contacted and provided case number: 9401017. The contact was referred to the local dealer. The failure mileage was approximately 15,000.

- Pacifica, CA, USA

While traveling on an interstate highway, vehicle suddenly lost acceleration & dashboard warning messages related to transmission, parking break, emissions & stop vehicle flashed across dash display. Exited highway & parked vehicle to cool engine. Restarted and about half of the display messages disappeared. Turned engine off again, waited a bit longer and when restarted, all display messages were gone. Went straight to local dealership where they replaced battery; mileage 40,000+.

- Fort Defiance, VA, USA

The contact owns a 2017 Acura MDX. While driving approximately 75 mph on a busy interstate highway, the vehicle suddenly failed to accelerate when the accelerator pedal was depressed. In addition, the electric parking brake, blind spot, and "stop driving" messages and indicators illuminated. The vehicle was towed to mapleton palm beach Acura (6870 okeechobee blvd, West palm beach, fl 33411), but the failure could not be duplicated. The dealer performed a software update on the vehicle. The manufacturer was not notified of the failure. The failure mileage was 35,649.

- North Palm Beach, FL, USA

When pulling forward from a stop into a car wash, the zf 9-speed transmission dropped into neutral without warning, causing the vehicle to lose all ability to move forward. When this happened, all warning lights on the dash illuminated, including stability control, airbags, check engine, lane departure, and frontal collision system, and the digital display flashed through every component on the car saying there were system failures in them all. The immediate remedy was to stop, place the vehicle in park and shut off the engine. When re-started the vehicle was able to be driven, but all system failure lights and warning lights on the dash and digital display remained illuminated.

- Daphne, AL, USA

We have experienced many issues with our 2017 MDX sh-AWD. On a cold start when shifting from first to second gear there is a sudden lurch hard shift. Once warm this is still present but not as pronounced. The transmission seems to slip through gears and have sudden downshifts that decelerate the car or the vehicle will lurch forward without having your foot on the gas as it shifts itself into a different gear. When trying to 'punch it' and accelerate quickly it will often hesitate to go into the correct gear then suddenly rev high as it speeds up. Hunting up and down through gears while staying at a constant speed. The navigation system is extremely slow to come up and respond to inputs when the car is started. Acura has claimed this is due to cell phone bluetooth interference. Collision mitigation system has engaged twice. The first time by husband was in a parkinglot driving through a row looking for a spot to park. The car slammed on the breaks with no cars in his path and nearly caused the car behind him to rear end him. The second time I was approaching a stop light to turn right, there was a vehichle in front of me but the distance I was stoping from the rear of that vehichle was not an abnormal or alarming distance. The brakes locked up with lights flashing on the dash and an awful grinding noise coming from beneath the car. On one occasion from a parked position it would not allow us to engage it in drive. It flashed "shift to park" on the dash. It took three attempts to get it to go in to drive. The rear hatch hydrolics had to be replaced within the first 6 months as the power liftgate stopped working. One of the two key fobs also went out on us in the first 6 months, replacing the battery did nothing and the whole fob needed to be replaced.

- Lincoln, CA, USA

Sudden unexpected breaking of vehicle. The vehicles collision avoidance system kicked in and breaked from 30 mph to a complete stop for no reason. There was no vehicle or object in front of my vehicle. Clear dry day. Traveling on a 4 lane local roadway. The consumer stated the dealership advised the E-Z pass toll transponder, which is placed at the top of the windshield, caused an interference with the collision avoidance system. The consumer found that difficult to believe.

- Exton, PA, USA

Acura MDX 2017 bought brand new. Has shut off completely 5 times in the last 60days. 3 times in the last 2 days. Come to a stop, entire car shuts off along with electronics. Occured the last three times at an intersection waiting to turn left or at a red light.. can't move. Have to restart the car. Dangerous. I've taken it to Acura and they say nothing is wrong. Service tech told me another MDX owner is having same issue.

- Ventura, CA, USA

I was parallel parking my car and after I got the car in the space warning lights starting coming on the dashboard. The warning lights were; electric parking brake problem, emissions system problem, blind spot info system problem, tire pressure monitoring problem, transmission system problem. I tried to put it into park and it would not engage. Then I thought maybe if I drive it forward some and then park again it will reset. I drive out of the space and noticed there was a red flashing light that read park and the D was flashing. I think the car was telling me I needed to park the vehicle? I went ahead and parked again put it in park (it worked this time, but the P was flashing) and then turn off the vehicle. It would not turn off and instead it just beeped when I pressed the ignition button. After what felt like forever I decided to press and hold the ignition button. It finally turned off. The next day I went to move the car, again all the same lights came on but this time it would not let me put it in reverse. I put the vehicle in reverse took my foot off the break pedal and nothing happened. I put it in park and again tried to put it in reverse. Nothing happened again. I thought maybe the brake was engaged, so I tried to release the brake and tried to reverse again. Nothing happened! I even pressed the gas pedal thinking it was maybe in between gears, nothing happened. I tried putting it in park and then reverse several times before the car finally reversed. I've only had the vehicle 1.5 weeks I bought it brand new with 26 miles on the odometer. Also, I noticed both of the display screens do not turn on immediately like they used to. When I turned on the car it was a full minute before they turned on and the ac turned on.

- Houston, TX, USA

Since christmas, the vehicle has had 8-10 occurrences in which the electrical system is going haywire. The instrument panel lists errors and code failures. And the vehicle cannot even be shut off. There is no cruise control when this occurs, and many of the 'add' on safety components (lane assist/etc) do not work. We stopped by the dealer last month, and they couldn't find any stored codes. Yesterday after my wife drove 6 hours home from detroit, with no cruise control and the issues occurring, she stopped back at the dealer. They took it in, as they believe there is a short in the ABS system. They provided a loaner as they rectify the problem. Issues began around 2500 mile mark for mileage. Veh has 4500 miles on it currently.

- Long Grove, IL, USA