Coils 3 replaced once when car was around 48K miles...This review is for Key Hunday in Jacksonville FL, USA

TERRIBLE CUSTOMER SERVICE! DO NOT WASTE YOUR TIME TAKING YOUR CAR FOR SERVICE THERE!!! This morning I took my Elantra in for a service that was Elantra's 2017 and 2018 are known for - Coils and Spark Plugs - to go bad. I had previously taken my car there for the same repair. However, this time my car odometer reads 100 miles over the warranty and right off the bat, Kyle, the service person, told me a Diagnostic Fee would be charged!!!

How come a diagnostic fee can be charged and even a repair for a known issue and just a 100 miles over the warranty. The issue happened once before and I was traveling when the issue happened, what am I supposed to do? Interrupt my trip and leave my car, wherever am I? Asked to talk to a manager and for sure, not available and would take 2 hours to be able to talk to her / him. I'm sure if I would be buying the car they would show up right the way!

If I could give half star, I would. DO NOT TAKE OR BUY YOUR CAR FROM THERE!

Why not replacing all coils at once since its a know issue?? Why there isn't a recall for it?

Stopped at a red light, the engine started shaking like it was about to stall out, and the solid check engine light turned on. Turned off and back on but still shook and check engine light was still on. When the light turned green made it through the light and parked in an area out of traffic. I called my local Hyundai dealership and was able to get in the next day. Started the car and the light was off.

Next morning started driving to the dealership and the car was acting like normal then half way there it started shaking again, check engine light turned back on and there was a loss in acceleration. Made it to the dealership and had them look at the issue before shutting off. Based off the other complaints are carcomplaints.com I assumed it was most likely the coil pack. Received a phone call that the coil pack for cylinder 2 was replaced and that the one that was originally in the car had a white mark on it. This was covered under warranty but the dealership recommended a body throttle cleaning which did cost me $156.43 which in my opinion should have been done free of charge since the issue was caused by the faulty coil pack.

The only concerning thing is there are 3 additional coil packs that were not replaced, I imagine they will fail in the near future and I really don't want to be stranded somewhere because of it. I did look up some videos on YouTube and the process was very simple to remove and install the new coil packs. You do not need to be an expert mechanic at all to replace so I may keep a spare on hand. In a nut shell...

1) Remove pop open engine hood 2) Remove engine cover (pops right off without need of tools) 3) Disconnect plug and play connection from the coil pack 4) Remove one 10mm bolt 5) Remove coil pack 6) Install new coil pack 7) Reinstall bolt 8) Reconnect plug and play connection 9) Place engine cover back on

Done

Frustrating and because of this I am not very confident in Hyundai quality and will not buy another one. I would have been happier if the dealership would have replaced all 4 coil packs at once instead of gambling for the remaining 3 to make it. They said that once they change one they usually don't have the issue happen again with the same coil pack making me think there is a new design that was created just for this issue.

2017 Hyundai Elantra 2L. When pulling out of parking lot noticed lack of power, I needed to cross 3 lanes of traffic immediately upon exiting the lot, so I pressed the accelerator 75-80% - car did accelerate, but VERY slowly. It felt like at least one cylinder wasn't firing. Car stalled when I got to the intersection traffic light about 150 yards from the parking lot. Restarted the car, several lights illuminated, but the car was still lacking power, so I pulled into another parking lot and the car stalled again. When I attempted restart, car said "battery draining" and could not even get the engine to turn over.

I called roadside assistance for a jump start, waited 20 minutes and attempted to start again, engine turned over and started, RPM was low ~600 and I had to use accelerator to keep RPM up to around 1,000 to avoid stall. I noticed a loud knocking, opened hood and listened - sounded VERY bad (think PISTON related), so I had wife rev to around 2600 RPM knocking extremely loud, engine seemed to be getting worse quickly. We turned the car off and had it towed to Hyundai dealership.

And it gets much worse - the dealership informs me that they no longer offer rental cars or loaners. This car is my wife's and I am presently without a car (sold mine recently and was looking to buy) so we're in a jam.

But it gets worse! I am informed that the only technician they have at that dealership that can look at this problem just went on a two week vacation. There are 10 cars ahead of mine on his work list, so my car won't even be evaluated for warranty work for 20 days or so. I am extremely disappointed with my experience at this point. We obviously need a vehicle quickly, but without knowing the "status" of our Elantra - will it be repaired under warranty and how long will that take, it's difficult to determine an appropriate price range for shopping - the Elantra could be worth 13K or pretty much worthless - that's a big difference.

Have had issues with ignition coils since 30K miles. Vehicle will surge on the highway, and lose power. Vehicle has never stalled. When the first cylinder started misfiring at 30K, I originally changed the spark plugs, but when the problem persisted, it was covered under warranty, but took two trips to get it fixed (diagnostic visit, and repair visit). At 50K, cylinder two started misfiring. I did not want to waste my time going to the dealer two times, and driving around with constant misfires while waiting for the part to come in so I purchased an aftermarket ignition coil, and again replaced all spark plugs (this car eats spark plugs). At 70K miles, I started having a misfire in cylinder one again. This time I purchased four aftermarket ignition coils and again new spark plugs. I replaced only the first ignition coil, took it for a test drive, and was surprised when I found that cylinder three was also misfiring. I replaced all four spark plugs and ignition coils. The third cylinder's spark plug was badly damaged. I noticed that after replacing all four ignition coils, not only did the vehicle seem to run much smoother, but the annoying tick at idle (that has always existed since I purchased the vehicle) is now gone.

The 60K 5 yr warranty is over for most '17 Elantras but its not worth the pain, since Hyundai will only replace the ignition coil which is bad, and will use the same OEM part that will (as in my scenario) go bad again. I suggest you replace all ignition coils with aftermarket coils, and replace the spark plugs as well if you develop this issue. This is not a cheap repair for an economy car that seems to happen every 20K miles.

The problem started a Sunday when I parked my car in front of a restaurant the car started to vibrate a lot and since I just arrive I just turn off the engine and went to eat, then after I finish I turn on the engine and the car stopped vibrating. It continued fine, then a couple days later I was driving on the Freeway I-10 at 60 MPH started vibrating and then the engine light was flashing did not stay so I went to the dealership in that moment, and they told me that they cannot take my car right of way because didn't have the engine light on, so I decided to book an appointment for service the next week.

The car continue to vibrate and run rough. I took it September 19, 2019 so they test drove the vehicle and check it for 3 days and they told me nothing was found and no engine light the car continues to run rough for weeks then on day the engine light comes up and I got myself a scanner and I was able to retrieve a P0301 and P0303 code so I took the car to the dealership again on October 3, 2019, now with my engine light on. After several days they told me that they replaced the coil # 3 and update the ECM, and also during the scan the coil #1 appeared. They erased them and did not comeback.

After I took the car this time it was running okay, not as good as before but okay, but now a week later, the car started to shake again - but like last time no engine light is present so I have to wait until that light come and stay to take it again. According to the lemon law of Texas I need to wait 1 more time for the repair to be done - they need 4 attempts to claim the lemon law so this next one will be my 3rd in less than a month.

After running for about 2 hours at 70mph, engine began stuttering and "Check engine" light came on. A few seconds later the stuttering stopped and the light extinguished. A couple of minutes later it did it again. Then the light came on and stayed on. I drove another 200 miles to get home. The next day the light remained off all day. The third day the engine stuttered a couple of times but no light.

I hate taking cars to shops for intermittent problems, but I don't want this to develop into something serious.

Any suggestions?

2017 Elantra stalling when slowing. I would slow down for a red light, stop sign or speed bump. The engine would just stop and the check engine light would come on. It would start up right away very easily after stalling. When sitting in a parking lot it would idle with no problem. RPM's rock steady. Took it to South Bay Hyundai in Torrance, California. I told them about the problem (engine stalling) and that I wanted to do my 60,000 mile service. Next day they told me that they replace 3 of the 4 "Coils" sending power to the spark plugs. They said this fixed the problem and they test drove the car. I paid $1200 and drove the car home. On the way home the car stalled 3 times so obviously they replaced things that did not need to be replaced.

I have noticed that the car seems to run adequately when the car first starts up in the morning. I read a "Car Complaint" on carcomplaints.com that someone had a similar problem. It said "...it was confirmed that there was a technical service bulletin that confirmed the failure for the thermostat."

I am taking the car back to the dealership on Monday. I will tell them about the TSB. We will see what happens...

Engine misfiring at random. It's EXTREMELY unsafe! Often times I'm either merging onto the highway or turning left on a signal with oncoming traffic and it would start misfiring at that exact time. I noticed that it misfires when you want power from the engine and the engine violently shakes until it resolves itself. I took it to the dealer and they got a p0030 code and all that they did was update the software. Not sure what that is supposed to do, but I trusted their fix.

A few days later it started misfiring 10x worse and this time it wouldn't stop untll you restart the car. Prior to the update when it would misfire, it'll illuminate the engine light, but after the update it doesn't. I think they are trying to dismiss the issue so customers wont have any code to show that it's behaving this way.

I'm extremely disappointed, to be honest, because I've owned a 2013 Elantra and I still have it and it performs flawlessly where as this new one is very disappointing.

Several months dealing with dealership with check engine light coming on and losing power, nearly choking out, they were finally able to get code to read on the computer...REALLY? PO30. This now October 9, 2018 and they are going to replace the coil pack. Just wondering if this will fix the problem? I am also dealing with the paint chipping and peeling off my hood. 2 years old? REALLY? My 2003 Buick with 180,000 miles was running better and more dependable than this. What a headache. I had to cancel vacation because it wasn't dependable enough. I have a beef with the entire car. Never again!!

So driving home from work one night in New Jersey, I was just pulling out of a gas station after stopping in for my night coffee. I was trying to pull out of parking lot. There was a car in front of me. He started to move forward, so I took my foot off the brake and when I went to give gas nothing all gauge lights went on and engine turned off. I had to put car in park to restart it. Then I went down the block and at the next traffic light I was stopping at, the engine stalled again. This was all on April 2. Nothing in between, until today. I go out for lunch and coming around a jug handle in New Jersey, car engine stalled again. This time because I was still moving, I was able to put car in neutral and restart. I made it back to work safely. Now I will have to be extra cautious when driving because I'm not sure when it will stall next.

I was driving to work on a Sunday morning, and had stopped at a stop light. The light changed to green and I pushed the gas pedal, and the car stalled. The RPM's on the meter were revving up, and the car would only go about 10 MPH. It was as if the car were in neutral. I checked to make sure the car was still in drive, and it was. Luckily there weren't many other cars on the road, so I crawled along until I found a place to pull over. At that point I turned the engine off, restarted it, and it worked fine the rest of the way into work. This has me freaking out. This is a brand new car. I am driving my old car until I can get this Elantra in the shop.

Update from May 26, 2017: I took the car to the dealer. They drove it around and ran diagnostic tests, which came up empty. They could not duplicate the issue. So they said it may have been a problem with the gas I was using. While this hasn't happened with any other car I have owned, I have no choice but to continue driving the car and to be very careful, expecting it to stall.