Engine dies intermittently at various speeds. Rmp's drop, engine light comes on and engine dies. At times there will be a shake from the engine and a loud rumbling sound while the fan was on prior to engine shutting off. Vehicle does restart immediately 90% of the time and drives normal. These episodes happen several times while driving. At one point I had my child in the vehicle, I was entering the interstate and the entrance ramp was onto the fast lane in rush hour traffic. I was traveling at a fast speed of approx. 65-70 mph as my vehicle stalled once again, I lost control of steering power. There were several vehicles behind me that had to slam on their brakes and veer off the road to avoid hitting me. It was a very scary situation to be in, nevertheless unsafe. My vehicle has been serviced with my local Hyundai dealership 3 times as of today. It's going back today for a 4th attempt. Service call #1: cannot duplicate and no codes present, bring back when it happens again. Service call #2: cannot duplicate and no codes present, reset adaptive values and road tested rescanned no codes present, bring back if any other issues. Service call #3: finally got a duplication, no codes present still, replaced front engine cover and exhaust cvvt phaser per Hyundai tech line. After having my vehicle back for the third attempt the engine dies twice within 45 minutes.

- Indianapolis, IN, USA

This is the second time this happened when driving on the road the car started shaking it would not increase in speed taken it to the dealer it was the ignition coil #3 the dealer stated that this is a common problem and might happen again as Hyundai will not cover to replace all 4 coils just the bad one that was in May 2019 now it started shaking again this time I was backing up out of a parking spot it is ignition coil #4 only 3 months later I had to put the car in park and wai for the shaking to stop blocking traffic

- West Grove, PA, USA

The contact owns a 2017 Hyundai Elantra. While driving various speeds, the vehicle suddenly shut off. Moments later, after restarting the engine, the vehicle operated normally. The vehicle was taken to an independent mechanic, but the cause of the failure was not determined. Flint hills Hyundai (7920 E. highway 24, manhattan, ks) was notified of the failure. The manufacturer was not notified. The failure mileage was 65,000.

- Salina, KS, USA

There is a check engine light. There is loss of power. Engine does not run properly. Correctly. The dealership can not find a fault code so can not fix it. The car is still under full warranty with premium extended warranty

- Kingsland, GA, USA

My engine light came on several times the car starts to act like it's going to stall then the engine light comes on there is like no power to the car a year ago I was driving up a overpass and my car stalled and the engine light came on I seriously could of got killed I want answers to why the engine light and the car starts to break down apparently I feel it's the engine or the power system is failing.

- Florence, NJ, USA

Since I have had the car from 2017 to now, there has always been an issue with the engine. The car will shake and then slow for a few seconds and the engine light will pop on. The breaks are sometimes very hard. I sometimes have to push harder on them, but then they make a weird noise. It is quite scary.

- Lakeland, FL, USA

Takata recall. I was driving on a highway and tried to speed up, my check engine light came on and the car was not speeding up or slowing down very well. It was slightly shaking. The check engine light turned off and the car was working normal again, but then the car screen started flashing and ended up shutting off.

- Elberta, AL, USA

Engine coils had to be replaced or switched out two times in two weeks. Car stopped in the middle of driving after it was "fixed" the first time. Causing a dangerous situation

- Chicago, IL, USA

I have a rear crankshaft seal leak in my car. I brought it to the dealership today, 4/4/19 and was told that it is an issue do to an accident. I did not have an accident that would cause this issue. I was told that now I have to replace the transmission. This car is a 2017 with 27,400 miles. I did not have an accident that would cause this issue.

- Garfield, NJ, USA

The engine started to make a loud ticking/knock when cold. Hyundai will not do anything saying it is "normal". this car has a 2.0 liter nu engine on the atkinson cycle. There were recalls in the past for the nu engine and it looks like there needs to be another one.

- Hackettstown, NJ, USA

1. low RPM approx 300, rough idle. A/C usage increses the random intermittent occurrence. 40,000 miles when issue was noticed. 2. relay switch, rapidly turns on and off. Usually at stops and idle. (sound location under hood/ engine compartment.) 32,000 miles when issues was noticed. 3. passenger side, front occupant seat sensor. Overly sensative, warning for seat belt when no passenger. Cell phone and or weight less than 5 lbs. 5,000 miles when issued was noticed

- Fresno, CA, USA

My car have problem with electric system the brake light fail every 2 weeks. When change the shift to drive to reverse loss the reverse

- Fajardo, PR, USA

The contact owns a 2017 Hyundai Elantra. While driving various speeds, the vehicle lost power and failed to accelerate. All the warning indicators illuminated on the instrument panel. The contact powered off the engine while in traffic. Once restarted, the vehicle was able to drive normally. In addition, while at a traffic light or stop sign, the vehicle would stall and all the warning indicators illuminated. The vehicle was able to coast to the side of the road, where it was powered off and restarted. The vehicle was later taken to atlantic Hyundai (located at 193 sunrise hwy North service rd, West islip, NY 11795, (631) 587-0700), but was not diagnosed or repaired. The manufacturer was not notified of the failures. The approximate failure mileage was 3,000.

- Bay Shore, NY, USA

The car is slow accelerate like something is wrong with it. It started the year 2018. The care was purchased 2/17/17 with 25 miles on it. The dealer claims they can find nothing wrong.

- Cleveland, OH, USA

34000 miles, equipped with smart key. Key was functioning, allowing entrance and unlock/lock/alarm functionality, but car would not start. Used roadside assistance to have towed to Hyundai dealership where they diagnosed the problem as a faulty starter. Vehicle was parked and had previously shown some hesitation with earlier attempts to start.

- Arlington Heights, IL, USA

The contact owns a 2017 Hyundai Elantra. The contact stated that the vehicle lost power without warning while driving. The vehicle was able to be coasted to the side of the road. The vehicle was restarted and was able to drive normally. The vehicle was taken to team Hyundai of bend (2250 ne hwy 20, bend, or 97701, (833) 236-6111) where it was diagnosed that the lack of oil changes caused the failure. The vehicle was not repaired. The manufacturer was notified of the failure and opened case number: 11617234. The approximate failure mileage was 26,400.

- Klamath Falls, OR, USA

Coils have been replaced to both number 2 and number 3 cylinders and the car does not have 20K on it yet. The symptoms were poor performance, including a feeling like the vehicle was going to stall and the inability to go much over 45 mph. Check engine light came on both times that this happened.

- Lake Mary, FL, USA

I first experienced the problem 08/14/18 driving home from work on I295N, the check engine light came on and the car didn't want to accelerate. On 08/16/18 the same problem occurred but this time it lasted until I made it late that evening. I took it to Hyundai of orange park 08/17/18 here in jacksonville and the problem could not be duplicated. As I was driving to work 08/22/18 my car started doing the same thing only this time you could feel the vibration of the car not wanting to accelerate and the check engine would go off as I'm changing gears and soon as I am done shifting it stays illuminated.I called the service center again and she says to bring it back in for testing and they can only fix it if they can duplicate the problem. I am very uncomfortable with driving this vehicle in traffic not knowing if it will cutoff and I am hit.

- Jacksonville, FL, USA

Engine light came on. Whole engine had to be replaced. Found out engines are dangerous and have exploded. Engines are on back order because of so many Elantra needing a new engine. This should be investigated because no one is warning Elantra owners about this until the cars break down. I am still without my car since June because engines are on back order until late August/early September.

- Mesquite, TX, USA

The contact owns a 2017 Hyundai Elantra. While reversing the vehicle, the back up camera became inoperable. The vehicle was taken to the dealer (gerald Hyundai, 209 hansen blvd, North Aurora, il 60542), but the failure was unable to be duplicated. The vehicle was not repaired. The contact also stated that the vehicle would intermittently start and then turn off, and the driver and passenger windows failed to operate correctly. The vehicle was taken back to the same dealer where it was diagnosed that there were failures with the engine bracket mount and electrical system. The vehicle was repaired. While driving various speeds, the steering wheel seized. The vehicle was returned to the dealer where it was diagnosed that the mdc bolt needed to be replaced; however, the dealer recommended that the steering column be replaced. The vehicle was repaired. The manufacturer was notified and informed the contact that they would assist by deducting one vehicle payment. The failure mileage was approximately 4,200.

- Geneva, IL, USA