general problems of the 2018 Hyundai Elantra - part 1

We were heading back to ohio at mile marker 8 75n kentucky when we heard a boom. Then we saw smoke as my husband was pulling over. We jump out to get our child out of the car seat and at the same time a pickup truck pulls up with two guys. They yell that our cars on fire and began putting the fire out with a fire extinguisher. We had an oil change before we left ohio by valvoline. This area of the hwy isn't really patrolled and only has a volunteer fire department. A constable just happened to pass by us on the way to indiana.

Initial fault code: p0303 replaced all 4 spark plugs and all 4 ignition coils. The check engine light extinguished momentarily but returned, logging p0303 and a new p0301 replaced all 4 fuel injectors. Cel extinguished momentarily and then returned, logging p0303. Replaced the entire engine electrical harness. Concurrently, all related electrical components and connectors were meticulously cleaned with professional contact cleaner. Cel extinguished for significantly longer period of time, and then returned, re-logging p0303 and p0301. Thid suggested the ecu was "handshaking" with new components but re-logging the fault upon detecting the persistent core issue. A full compression test was performed. All cylinders reported results within specification. Using a borescope I inspected cylinder walls in piston tops. There was significant carbon residue buildup but nothing out of the ordinary for similar gdi engines. I still performed a pea gdi specific chemical cleaning. It was a a little smoother afterwards, but the misfire persisted and cel remained on. I also removed, cleaned, and tested common sensor faults, with no result. Also p0128 code and no start / electrical drain, and engine light started flashing numerous occasions had to stop the vehicle. I tried swapping the coils, but all that proved was that the coil was good, I did a power and ground test, it passed the connector had 12 plus volt power and a perfect resistance to static ground. The signal wire from the coil connector had perfect continuity to the ecu but had ol to chassis ground showing there was no short. A test light was used to see if anything was coming from the signal wire to the ignition coil and that test failed, there was no signal pulse. The diagnostic process has definitively proven a component-level failure inside the engine control unit. See attached file for more detailed information.

My husband filed a complaint about the lighting on his Hyundai sonata and I have a Hyundai Elantra that is doing the same thing. Twice now while I’ve been driving at night, my headlights have gone off an and come back on by themselves. They were off about 15 seconds each time. Then this week I had my back break light (the one close to the windshield) and the passenger side headlights go out suddenly. My car is a 2018 Elantra with 70k miles on it. I just got through replacing both headlights about a year ago when my car had 60k miles on it.

This has happened a couple of times where in the middle of driving, my car automatically shuts off, I can not turn my steering wheel I can not push the brakes, everything stops working. I have to wait till my car comes to a complete stop on its own, put the car in park, turn off the ignition, turn my keys and start my car again. Then it sometimes acts like there is no power to accelerate when I'm at a full stop. Rpms go crazy, but acceleration doesn't occur. No warnings have ever come up. I received an notice about a recall, but it's for 2019 Elantra and up. Mine is a 2018, but the issues for that recall is the same thing that is happening with my car. This is dangerous and can lead to serious repercussions or even death. Something needs to be done to fix this. I don't not have thousands of dollars to pay for an issue with the manufacturer.

Car doesnt register maps well freezes dashboard gps lights flicker. Keeps making noise beeping requesting passenger puts selt belt on when theres no one there.

On the freeway going about 45 mph tried to speed up and switch lanes as I pressed the gas you can hear the acceration but the car didnt increase in speed the whole dashboard went blank (black). Car was unresponsive. Its very dangerous that the car falfuctions in critical conditions like being on the freeway. Yes I have tooken it to Hyundai and they never find anything wrong. Also at times the car wont even turn on. No type of waring lights on dashboard.

My 2018 Hyundai Elantra went from 50 mph to 0 in seconds. I was able to coast to the side of the road. The engine shut off. The engine and oil lights came on . Car didnt turn over after that got it towed to my house and once there checkd the oil and the oil was completely empty. Received my last oil change on 1/31/2024 still had miles left over before getting another oil change. There was no warning or signal notifying of oil low or anything after speaking with service mechaninc they mentioned the engine being shot. There is not even 100,000 miles on this engine and it needs a new one. Contacted dealership they advised no recalls on this model. Hopefully adding another complaint can get the ball rolling so there can be a investigation.

So my 2018 Hyundai Elantra has had the ignition/starter coils go bad now for the third time, the first 2 times the car was under warranty, I thought the second time it was odd to have the same problem, the car shakes violently, stalls out, and or refuses to start. But my warranty just ran out in 2023 and now of course the same problem is happening again, I took it to the dealer and they repaired it, it was very expensive, but I really thought since it was the same problem that they or Hyundai would cover this repair, of course they laughed at me so of course I paid it and hoped that Hyundai USA or the dealer, ron marhoffer Hyundai in akron, ohio would cover it after the fact but they both refuse simply stating that this problem happened after the 5 year warranty. I totally disagree , especially since this is the same problem happening again and again, it clearly was never fixed properly or has remained defective over the lifespan of the vehicle. I did some research and was shocked at the thousands of reports of other american consumers with the same issue and again the company laughing at us all. I am hoping for some consumer protection here for parts on a vehicle that are clearly defective and should be recalled and replaced properly. I guess we will just have to wait for someone to stall out while driving and wreck and die for something to be done unfortunately . I am assuming its probably already happened. When it happens to me again, which it will, I will hope and pray for the best. Please help.

The contact owns a 2018 Hyundai Elantra. The contact stated that while a friend was driving the vehicle at various speeds, the vehicle suddenly shut off and would not restart. The vehicle was towed to the local mechanic who was unable to determine the cause of the failure. The vehicle was restarted without any service being performed. The contact stated that the failure occurred intermittently. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 60,000.

Car isn’t starting just changed the started two years ago after it failed now it’s not starting we have gas in it and it won’t start.

My Hyundai Elantra is a lemon. I have been having accelerating problems, stalling problems fresh from the lot even before 5,000 miles with my Hyundai not accelerating took it to dealer said nothing is wrong with it 5 years ago. It still continues to stall on me! it broke down on me twice in two days in a row. One on 8/8 and 8/9! could have killed me or others if I took it on the highway. My car has been stalling and I had to pump the break to rev up the engine at the same time while turning! could have killed us! I am sitting in a lemon! it is not safe on the road at all!! I lost my job because of this and the time it took me to try and get a rental. Hyundai won't let me get a loaner car! I cannot afford uber all the time. All the lights are on. Check engine light too and airbag light. My transmission seems to be slipping too and the double clutch. Crank and cam shaft problems! headlightw are very dim too. Airbag weight front seat sensor is turning on. Engine is stalling. Slows down! will not accelerate after 60mph goes super slow down to 55 mph up hill. I want Hyundai manufacturer to pay or I am getting a lemon lawyer and contacting the bbb and the state of arizona.

While driving, heard a loud pop then smoke came from the engine. The electrical system flashed then went out. A passer by coming from the opposite direction stopped and told me that my car was on fire. I got out and there was a small fire on the groung underneith my car. Then opened the hood where there was a small fire behind the engine. Another truck passing by had a fire estinguisher and put the fire out. There was oil all over the road. Called a wrecker service to come and pick it up. Upon delivery of my vehicle, there was oil all over the wrecker. I'm very lucky to have had someone come by to put the fire out. I could of been in the car and been burned. The insurance company has been out and done a full report on it. There were no warning light that came on detecting any issues.

Unknown- intermittently - multiple times a day for the last month the car starts making clicking noises like a card in the spokes of a bicycle. Mechanic could not find the cause. Unknown- two times in 2 weeks- while making a turn my car stalled in the middle of an intersection, all the lights on the dash went on, and wouldn't start up again for a couple minutes. Then car starts and runs fine besides the intermittent clicking.

First, the plastic around wheel wells began to come out, then other parts of underneath near the skid area at the front of car begin to drag. Eventually a lot of the plastic pulled away underneath the car taking some of the front bumper. Then the car ran hot and had zero fluid in the radiator even though I regularly have oil changed and fluids topped off. Now the air conditioner throws out hot air when it on. I’ve regularly had oil changed. After only 3500 miles of having oil changed my oil light would come and car stalls when I’m turning. This could get me hit and killed. I bought car from car max and took it back as I have extended warranty that I’m paying for. They told me I had to have an appointment nearly a month out. I told them car needed to be seen now, that engine is probably going to go. Carmax refused to see my car and I now have an appointment at the huyandi dealership . Carmax stated that Hyundai would replace my engine for free. I would like to state that I used car fax and found out car was a rental car and driven in three states. Also according to the VIN number the oil in my Hyundai was changed for the first time at 18,000 miles. I still owe three years and I’m not going to have a car because it may blow the engine before I can get it into dealership. I never would have bought the car had I known it was a rental, but carmax kept telling me it was a one car owner. The car had 36,000 miles on it and I should have known. Yes, it was a one car owner by the car rental agency and driven by hundreds of people, who didn’t care because it was a rental. Also, the check engine light is on and I can’t get car inspected or renew my tag. I had to replace calipers on both sides of car and I’ve had to have it aligned three times. It also makes a thumping sound on right front tire while I’m driving it. Feels very unsafe. Replaced brakes tires and it still makes noise. There needs to be a way to protect the consumer!!!!.

My right rear brake has a short in the wire. It goes on and off where I hit bumps in the road. I have tried replacing and nothing works. My car was broke into and steering column was busted. They person who broke into my car was able to put a usb port onto the ignition and start my car.

I just started my drive and my car seems to have rebooted while I was driving. The whole ordeal only lasted a few seconds. Things I noticed: 1) the steering locked (guessing the electronic controls were down) 2) a few telltales were triggered and then the instrument cluster went blank 3) a the same time, the infotainment system went blank. Both the instrument cluster and the infotainment came back after a few seconds 4) the engine revved up a bit at some point this has never happened to me before. I suspect it may be because of a new build software that was flashed to fix a security issue with Hyundai cars but I'm not sure.

Passenger seatbelt alarm will sound randomly even when nobody is in the passenger seat.

Financed last year (2021) at 38,000 miles, financing a vehicle I wish I knew to do research before hestitly excepting my first offer, first waring was on the test drive. The car had to be towed back to dealership because the battery was dead. In the sub-zero cold, the battery with read low and this causes electrical issues, from remote start not working to unable to open the doors. The more common and reaccuring issue that is getting worst is the lack of excellaration when taking off. Realizing this drastic difference recently, I know there is some thing happening, but I have not had much good customer service when I have brought issues to dealership and services center. Also issues with harness for the back left lights. The harness that holds the bulb keeps burning out. Dealer has never fixed when I immediately experience this issue and they just replaced the bulb twice until they realized the real problem and told me it would cost me $160.

The car has a security vulnerability where the car is able to start without the key being present. Also, the engine will shutter randomly (car will shake) when in idle. This happens especially the first few minutes from a cold start.

My Elantra was taken by theft. Rear driver side door broken. Ignition harness torn apart and the car was driven away from my senior living home parking lot on July 23rd at 3 p. M. Police were called but car was taken off the lot before they arrived. I received call from police on July 27th that the car was in an impound lot in st. Paul. Drivers side front tire blown out, wheel severly damaged. Some body scratched in left rear. Front passenger seat badly stained. Other damage unknown. Vehicle been at walser Hyundai since about August 1st. Shop waiting for parts for repairs.

The engine suddenly started stalling at stop sign or red lights at random times and the engine immobilizer light came on along with check engine and oil light. This was dangerous when turning left at an intersection. Car would be fine after restarting the car. Other times the esc malfunction light would show while driving and the engine would not accelerate properly on the highway and the engine would also start jerking at times. Dealer said they could not fix it as this was an intermittent issues and they could not reproduce the issue when given for repair. Dealer and company did not agree to do a complete check and replace sensors, etc.

My brake lights kept burning out. I replaced them and they burned out the same day. It seems that the wire harness is corroded. I believe this is a manufacturer issue.

The air bag warning light randomly comes on disabling the air bags. It seems to turn on when the passenger seat gets moved forward or backward fast. In looking into this, it would appear Hyundais over the years have had this issue. It turns off sometimes when some one sits in the seat.

In regards to my 2018 Hyundai Elantra limited currently with 47000 miles, driving and noticed the a/c temp display which also controls fan speed stopped working, display was blank. Checked all other electrical equipment inside car with no problem except that the heated seat function didn't work also. While doing an exterior inspection noticed that all lights except the headlights worked. After the interior and exterior inspection and no error codes or indicators on the dash, I had the alternator, battery and starter checked along with probe testing every fuse in the car and under the hood checked and everything was fine. The car has been perfect up to this point which is alarming because if the headlights go out while driving at night or in the rain this is a safety problem and driving citation. My only indication of when this happens is if the a/c control display goes out. The problem is intermittent and hopefully it won't happen again and I couldn't find any other similar things like this happening to others.

My car will shut off as I’m driving it. I was going thru a busy intersection and my car turned off, I was in my car with my 3 babies traffic backed up and almost got slammed into. I had to get out and push my car to the side of the road. The check engine light started flashing then the whole dashboard started flicking.

About month ago sept the car would shut off when driving or stopping and find out it oil I had changed at the tire shop it was changed 2 n half months before that once oil changed running good low tire light ,oil light flash off and on at time well as of 10/12/2021 started do it my again so I check oil there no oil werid where oil go no leak on ground when I leave wherever I parked well went to walmart get oil put oil in it and started driving not even more 35 miles bout sudden smoke coming from under engine then smell fire I pull over in parking lot at restaurant ran put fire out and it got worse trying grab my stuff and bf with me fire went inside car and under the car hear siren firemen coming if they hadn't gotten there when they did it almost went to the gas tank could of exploded firemen said look like electrical cause fire . Engine light ,oil and tire light were on now undrivable .

It appears the parking lamps stay on when car turned off while headlights are in auto. This leads to unintended battery drain leading to unoperational car. Per owner's guide: the system automatically turns off the parking lamp when the key is removed (remote key) or when the driver turns the engine off (Smart key) and opens the driver-side door. This does not meet the owner's guide's language. Dealerships and inspection services did not confirm/reproduce this. There are no warning lights or indicators of this.

My multifunction switch appears to be defective. I have taken it to 2 different dealerships to be looked at. They have been unable to replicate any issues either time. Occasionally at night time the headlights will randomly turn off. This happened in auto mode as well as when it was pouring down rain and the wipers were on. The headlight indicator on the dash stays lit but the lights themselves turn off. This also happened driving to work in the early morning. When it is cold outside and also randomly the left signal indication doesn’t work in the lane changing function. I sometimes have to hit it 3-4 times before it decides to come on. Neither dealership I have used knows what is happening with the vehicle and I am not keen to spend $600 to have it fixed if it’s not going to 100% fix the issue.

While driving my car it just stops. I have been complaining to the local dealership for 1 year and they keep turning me away. My battery was replaced and that is it. I was told I was exaggerating that this was not happening. Yesterday was different from the other times it stopped. My car stopped on a busy highway and I almost ran off the side of the rode a cliff because the wheel and brakes locked up. No one is taking this serious. As I am driving the car will just shut off. The local dealership advised me to drive even further to get it fixed. How is this safe? I was told by rich its my car I own it its not their problem.

Started loosing power then throw a rod throwing oil everywere right after 100000miles.

On June 29,2020 my 2018 Hyundai Elantra with only 40,000 had a engine fire and totaled my entire car that was parked and turned off inside of my garage.

Passenger seat air bag indicator flashes and warning sound indicates seat belt is not buckled when nobody is in the seat. When accelerating, there are multiple hesitations where the car feels like it is in park or neutral. After about 15-30 seconds, the car starts accelerating normally.

The low tire pressure warning lights came on as I was driving down the highway and my tire pressure was displayed as 14 psi on my back left tire. I pulled over and looked at the tire and it didn't seem low. I plugged my portable tire air pump in and attached it to the tire, and the gauge on the pump said 36psi, which is what it is supposed to be at. I got back in my car and started driving, and the car said the psi was back to 36psi. Sounds like this is a common problem and Hyundai needs to address it. I even took picture of the warning when it came on for proof.

About a couple weeks ago.

Car has intermittent problem with acceleration. Will go into a fail safe mode, wont accelerate past 40-60 mph. I have had very close call on multiple accidents due to the fact I am unable to accelerate. My car lost power and could not pick up speed at all. This is a major safety issue and the car dealership will not help me.