The contact owns a 2018 Hyundai Sonata. While driving 60 mph, the vehicle became sluggish, decelerated, and failed to accelerate above 40 mph. In addition, the check engine indicator illuminated. The vehicle was taken to napleton's valley Hyundai (4333 ogden ave, Aurora, il 60504, (630) 851-2500) where it was diagnosed that the wire harness needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and case number: 15704477 was provided. The failure mileage was 19,000. The VIN was not available.

- Bloomin Broke, IL, USA

On 03/23/2019, when I was leaving a parking lot my car started to hesitate and would not rev up. I just turned out the parking lot when this happened. Message came on stated it need to be serviced. At the same time the engine light came on. I was not able to press the accelerator because it would jump like crazy. I was able to get back to the parking lot safely. I have been in a rental for a month now and as of 04/23/2019 I was told the part is on back order. The wiring harness and the computer has to be replaced, but the tech stated since the car went into limp mode the engine will need to be replaced. I was told the part will be in about 3 to 6 months. If the wiring harness does not work god only know how many more months it will take for a new engine to arrive. This car was only 9 months old but now 10 months old with one of the months being in the shop waiting for repairs.

- Jackson, LA, USA

I was one of the first people to drive off with this 2018 Sonata 2.0T trim in ending of 2017. Fast foward to now, I have been having electrical, lighting and engine problems. When driving at night, it is hard to see what's 30 feet from you on the ground because there's some parts that the light doesn't illuminate very well. When I have my car's interior lights on auto meaning to turn on, whenever I open the driver's door, it doesn't turn on. Sometimes my headlamps won't turn on neither, when I press the unlock button from my keys. Couple of months back and still is happening to this day my cars engine will start up funny or start up a couple of seconds late after pushing the start button. It even happens when I let my car sit for a day without driving. I've been to the dealer now and told them about the issue with the interior lights and I am waiting on them to get me some new lights for the interior (pretty sure that's not the problem). I know now that it's something electrical seeing all these comment/issues left on here. I paid too much to have this happening to my car. Maybe I should of just stuck with Japanese smh. Help please.

- Baytown, TX, USA

While driving my vehicle at nearly 70 mph on the freeway, my car suddenly felt like I hit a brick wall and my check engine light came on and began flashing. I was then unable to accelarate past 55 and felt my car had a very sluggish response when stepping on the gas pedal. I was nearly hit by another car because there was no warning (break lights) when my car immediately slowed down. I then had to have my car towed 50 miles from where I was to the dealership near my home. When I brought in my car they said they had another car with the same exact issue. I called after my car had been there for approximately three days to get a status update and they said they still didn't know what was causing the issue, but that a third vehicle had now been brought in for the same issue. Today a week later, I called to get an update and the other two vehicles they are fixing with a new wiring harness; however mine they stilll are unsure what the issue is. This is now the third issue I've had with my car in less than 13,000 miles. Previously my car was having trouble starting the dealer said everything was fine. Also my front running light burned out at nearly 7K miles.

- Simi Valley, CA, USA

I took my 2018 Hyundai sonta SE in for its first oil change with 3564 miles on it. They did a computer update as part of a recall. I drove less than ( miles from the dealership, went to pull out from a stop light. It started miss firing and the check engine light started flashing. I went back to the dealer. They said it had a code and tgey had to call Hyundai to find out what to do. They gave me a loner and told me the wiring harness had too much interference/static in it and they had to order a new one. Very hard to believe a computer update would cause the wiring harness to go bad.

- Prosperity, PA, USA

Car has keyless start. Will not start in temps below 20 degrees F. has happened 4X in 2 weeks. Car is 8 mos old / less than 6K miles. 1st 3 times eventually started by running engine. The warning lights that show are charging system (ran itself down to 57% battery this time); engine oil pressure and mil light. The immobilized indicator is on but then goes off. The tank is full of gas. The blue link app can't remotely start the car. It states that the request was not processed.

- Newton, MA, USA