2018 HYUNDAI ELANTRA Engine Problems

The oil plug fell out and caused significant damage to the engine where the engine is seized and no longer works. It can be inspected if requested. Check oil light did not turn on. The car wouldn't run and almost got stuck in the middle of the road. The problem is common and recognized by you. No remedy has been made with the manufacturer. Insurance inspected it and told us that it was due to an impact wrench not being used to tighten the oil plug. There were not.

I have a 2018 Hyundai Elantra with about 155k miles. It has been consuming oil excessively and has developed serious drivability issues. If I try to accelerate even slightly harder than normal—especially above 2,000 RPM—it makes a metallic, chain-type rattling noise, loses power, and produces heavy smoke from the exhaust. The smoke sometimes continues even after shutting the engine off and restarting. Because of this, I’ve been avoiding rapid acceleration and slowly working up to highway speeds. The car also periodically shakes at idle, idles higher than normal at times, and the RPMs will occasionally rise on their own. In the past it has stalled randomly, and sometimes it feels like the transmission is “stuck” and won’t shift properly. Despite all this, there are currently no check-engine codes. This is terrible and clearly there’s been lawsuits and other recalls regarding the same issue and same engine but nothing for mine?...

What component or system failed or malfunctioned, and is it available for inspection upon request? The car began stalling and started to become unresponsive while I was driving to work. While I was not 100% sure of what component was malfunctioning at the time, I suspected that it might be a timing chain problem because I had this same exact issue happen to to this car back in January 2025. I did not expect this issue to occur again because at the time of the previous problem, the dealership confirmed that issue was the timing chain and the VVT system, and replaced those components with new parts. How was your safety or the safety of others put at risk? The car started stalling and sputtering, then became unresponsive while I was driving. If I were in a high-traffic area, I'm not confident that I would have been able to accelerate,...

It is showing signs of excessive oil consumption. 200 miles before my next scheduled oil change there was no oil in the car, causing overheating issues. It uses the same engine as other recalled years for the same issue. However they never issued a recall for the 2018. The only update I've ever received was a surprise notice from Valvoline, mid oil change, that if I didn't use the more expensive oil change option, which I couldn't afford in the moment, that I would void any warranty from Hyundai. There was no prior notice or contact from Hyundai informing me of this "New" (the valvoline tech's words not mine) policy. So not only is my car experiencing an issue known to affect this engine, they get to absolve themselves from responsibility by surprising someone with a greater expense than they are expecting, by not giving notice to their customers? This...

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...

My engine blew in September 2024. I had it replaced. When I replaced it I got a one year warranty and unlimited mile warranty. It now blew in July 2025. I have had it hyundai of mankato which they didnt want to wait on hyundai of America to do anything to fix it and told my mechanics to have my car get offline their lot. My mechanics towed my car to Happy Hyundai of Rochester. HYUNDAI of America will not accept my warranty now and just pay for the new motor, tear down, and the time they have in it. Hyundai of America told my mechanics if they took it from Hyundai of Mankato and brought it to another dealership that they approve of that they would accept my warranty and pay for all parts and everything. Hyundai of America picked Happy Hyundai of Rochester. Where my car is.

Excessive oil consumption. Engine completely dry after 3500 miles in between oil change with no check oil warning light

In early May 2023 I was driving my 2018 Elantra vehicle on the expressway. I had hot an area where there was traffic and had to slow down and move along with the speeds everyone else was going. When I slowed down my engine quit. Everything turned off and the car was stalled. I was able to turn the car back on and start the engine but there was a loud knocking sound coming from the engine and when applying my foot on the gas it wasn't going anywhere. It stalled in traffic again. I put it in park, and restarted it and got enough gas for it to move and get off the main road. I called a tow company and had a certified mechanic take apart the engine $600 and Inform me the engine was shot. The car had maybe 80,000 miles on it. I had no idea...

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.

Oil consumption will cut off while driving

The engine of my 2018 Hyundai Elantra has a rod bearing defect covered under a safety recall. The vehicle has not been repaired yet, and the issue prevents the car from being safely operated. I have incurred towing expenses due to the inability to use the vehicle, and I am concerned about potential engine failure or safety hazards if the defect is not addressed promptly.

The dealership replaced my engine and spark plugs when the pistons were grinding metal causing a catastrophic failure in November of 2024. In July of 2025 I started experiencing the same issues and the dealership stated that Hyundais ignition coils have a high rate of failure because they changed the design and used my old ones from my engine replacement. It is now I brought my car into the dealership July 18th and they stated that was their best guess but they didn’t now forsure. I was never informed of the high rate of failure until I was experiencing it.

Oil leaking from pistons in engine just like the recalled engines

I purchased a 2018 Hyundai Elantra on April 3, 2024, from CarMax. At the time of purchase, I was not told about any recalls. Later, I discovered that my vehicle is covered by Hyundai Service Campaign 993 (Anti-Theft Software Upgrade), issued February 13, 2023, which addressed the lack of an immobilizer in 2011–2022 Hyundai vehicles. On May 29, 2025, my vehicle was stolen due to this defect. When it was recovered, it had a blown engine and was completely inoperable. Hyundai acknowledges that my VIN is included in the recall, but they have only offered to install the software update now. That does not remedy the damages caused by the theft and resulting engine failure. CarMax has denied responsibility, claiming they were not aware of the recall. I am now left with a financed vehicle that is not drivable and has lost significant value due to Hyundai’s defective design.

Burning oil. Multiple misfires. Replacing spark plugs more often than should have to. Engine knocking.

The crankshaft needed replacement The oil pump broke at 107,000 miles

I started my vehicle and it was running sluggish and low idle. I had an engine light and when I tried to drive there was a clanking sound. When I had the engine light tested I received the following codes: P0017 - Crankshaft Position Correlation Bank 1 Sensor B, P0303 - Cylinder 3 Misfire Detected, P0302 - Cylinder 2 Misfire Detected, P0301, P0014 - Exhaust Camshaft Position Timing - Over Advanced (Bank 1), P0030 H02S Heater Control Circuit (Bank 1, Sensor 1) I had it towed to my nearest Hyundai dealer in Tacoma, WA. After they did a diagnostic they said that they would have to replace the engine due to a shearing of a pin, leading to the belt jumping and causing issues. I am the only owner of the vehicle, I have had all my oil changes on time and my vehicle is 137,000 miles. This should not...

Burning oil internally. Adding 1 quart about every 1000 miles.

Formal Complaint: Engine Failure in 2018 Hyundai Elantra To Whom It May Concern, I am submitting this formal complaint regarding a severe and unresolved issue with my 2018 Hyundai Elantra, which has been problematic since the time of purchase and has now suffered a complete engine failure. Despite regular maintenance and responsible use, the vehicle has proven to be unreliable and unsafe. 1. Nature of the Problem The most recent and critical issue involves total engine failure. On May 12, 2025, I brought the vehicle to North Freeway Hyundai due to the car not starting. Their official diagnostic report revealed that the engine needs to be replaced. Additionally, the inspection showed issues with the transmission cooler coolant lines leaking, EFI system, camshaft exhaust, radiator hoses, and the battery. These problems affect essential systems that are critical to both the performance and safety of the vehicle. 2. History of the Problem...

I am filing this Vehicle Owner's Questionnaire (VOQ) regarding critical safety defects in my 2018 Hyundai Elantra related to: - Recurrent ignition coil pack failures (3 replacements since 10/2018) - Engine stalling at low speeds (6 incidents since 10/2018) - Dealer refusal to apply TSB 20-01-008H ECM update despite matching symptoms Technical Background: Hyundai Technical Service Bulletin 20-01-008H (February 2020) specifically addresses: - Misfire detection logic flaws in 2018-2019 Elantra 2.0L engines - Required ECM software update (ROM ID AD8SP2AS673D) - Updated ignition coils (P/N 27300-2E601) Safety Incidents: 2025: Stalling event at 25 mph approaching traffic light (no crash) 2021, 2023, 2024: Multiple misfire codes (P0300-P0304) with check engine light Dealer Interactions: - Round Rock Hyundai refused ECM update on 05/2025 claiming "VIN not in campaign" - Round Rock Hyundai refused coil replacements on 05/2025 claiming not under warranty - Service advisor acknowledged stalling/coil failure pattern matches TSB criteria Formal...

While driving on the expressway, my vehicle suddenly stalled out. I was able to restart in but the car would not go over 25mph. I was able to pull off the next exit and call for a tow truck. My vehicle was brought to a local shop and they pulled the engine and find that it was shot. Due to Hyundai, they requested to do their own diagnostic and found the same issue. The vehicle ad less than 80,000 miles on it. I received an invoice for repairs required which was over $16,000 in repairs including replacing the engine. I pleaded that they cover the engine and this seems to be a recurring issue with this model. They refused. I am stuck with a vehicle I cannot a drive and is now sitting in my driveway with no option but to wait for a open recall.

Check engine light came on , car was sluggish and stalled on highway , was able to glide over to the side . Would not start . This is the 4th time this happened to this vehicle , in the past I was able to put in neutral and restart . They fixed it 3 times but they are now Hyundai is now saying it needs a new engine.

Check engine light came on, took to mechanic. Diagnostics showed pistons performing at half of the required psi. Engine replacement required at a cost of nearly $9,000. The vehicle only has 74k miles.

While diving the vehicle started to sputter and the ignition turned off. I was able to start it but the vehicle was making loud clunking sounds and max speed of 10mph. I pulled off on the side of the road and called for a tow to a reputable repair clinic. I told them what happened and they stayed they would be required to remove the engine to determine the issue. $$$ I paid the funds and they informed me the engine was shot. The vehicle has just over 80,000 miles. I contacted Hyundai directly and was told the manufacturer 100,000 mile powertrain warranty was invalid due to me not being the I original owner. I convinced them to take a look and make their determination. After paying out of pocket again for towing and the $175 I initial service fee Hyundai again told me the engine was shot and their...

Engine shuts off suddenly in the middle of road; several times on the way back home while my wife was driving with no warnings. Very unsafe if another car is behind. She cranked over and it went, but it happend again in an intersection after a stop sign, fortunately no cars were coming. No shows WARNING LAMPS, check engine light on or diagnostic trouble codes, but engine next day started making noises like knocking or ticking. Car is only 140k miles. Symptoms appeared 2 days ago 2/23/25

I bought my Hyundai Elantra 2018 in 2022. It started knocking by 2023 and i was told by the dealership it was plastic hitting the tire. I brought it back & had it scanned prior because the knocking never stopped. And another dealership confirmed it was the sealed transmission. There is no dipstick to check the fluid & it says in the book the fluid is good for the life of the transmission. The dealership i initially bought it from acted like it was my fault so my car sat May until August 2024. Finally, after i found out the unlimited warranty i paid for was never submitted in 2022 it was approved. They then replaced it with a refurbished transmission which i didn't know until i got my car back. I had mentioned an oil leak & lots of play in the engine that November after replacing it. They...

Had to do 3 oil changes in a month had to change ignition coil that had been changed a month ago spark plugs were completely covered in oil was driving and it literally just stopped every time the oil would be checked it wouldn't be any on the dipstick.

My 2018 Hyundai Elantra had an oil pressure light on and the timing chain was slapping the side of the engine. I changed the timing chain, oil pump, oil sending unit, and oil filter. When I dropped the oil pan, there was paint chips in the pan. Who paints the inside of an oil pan? I removed the oil pick up tube and discovered the inlet screen was covered with these paint chips. I cleaned the inlet and reinstalled the tube and oil pan. I no longer have the low-pressure issue. This is causing engines to have major issues and / or making them seize up. Now, I believe there are a lot of Hyundai and Kia vehicles in the junk yards today because of this very issue. Majority of people will not take their engine apart to find out why it stopped working. They ether stop paying on them...

My car lost power on a busy highway which almost caused a tractor trailer to rear end me. I had the car towed and the mechanic said the engine is bad because of issues with this engine losing oil quickly and there is no recall on it but on other years. Now I have no car but still owe money on it and can’t get to work. Luckily i wasn’t hit by the tractor trailer but this should be a recall and i should be able to get it fixed without being out thousands of dollars.

Engine seized up at 142K miles. Had regular oil changes and maintenance. Connecting rod crank shaft end / bearing blew apart and seized engine.

Engine is knocking cannot find a solution for this problem car stalls wen coming to a stop the car completely powers off , noticing a weird smell now ,

Driving on the freeway around 55 MPH the engine would stall. Scared the heck out of me this started around 130000 miles on the car. Fixed a sensor still didn’t fixed the issue did an oil change that seemed to fixed the stalling. Low oil light never came on. So for years after that when the car stalled I did and oil. change. Finally at 183000 the engine gave out. Did my research found out Hyundai knew there was a problem with the engines. On 2019 and 2020 Elantra engines have been recall. 2018 not enough complaints on th engine. There was a knock sensor recall on the car. I never got a recall notice. Sent an email to Hyundai saw that the email was received but no one has responded this was a month ago. Taking my Hyundai to the dealership to see if they’ll do anything for me....

The engine experienced rod bearing failure while driving the vehicle. The vehicle died on the road in a high traffic area, which put me and others at risk as they tried to maneuver around the car and as I tried to get the car off the road. The car had just had the oil changed, and had consistent/regular maintenance. No warning lamps lit up on the dashboard at all until the engine died, at which point the oil indicator lit up. The vehicle has been taken to Hyundai and confirmed to have rod bearing failure, a known issue with engines in Hyundais and Kias.

Hyundai engine from 2017 and up are not good engines my experience on my 2018 Hyundai engine is the same as what I see 90 percent of Hyundai owners are having regardless of the year there all the same engines it’s burning oil it’s making ticking noise with regular maintenance no neglecting y’all have to understand there are so many ways and possibilities of engine premature failure then it is Maintaining the engine during buliding these engines you have metal particles over tighten the heads the blocks not seating the piston rings properly dirt that can clog up the oil galleys to luberciate the moving parts poor design there’s so many ways to say it’s not a manufacturer defect and they tell us change the oil ok how come I’m having more issues and hearing issues from a engine then the transmission you do more maintenance on a engine then...

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....

About 4 weeks ago (mid-May) I was driving in stop and go traffic on a major highway. My car is a 2018 Hyundai Elantra, manual transmission. After about 30 minutes of this, the car started to just cut out, the engine cut out when I was changing gears. It did this about 6 times on my drive home. I noticed that when the rev meter got below 1, the engine would just stall out, so I tried to give it gas to keep the revs up. In addition, the engine was making a knocking sound. I took it to my mechanic's the next day and when he heard the sound, he said it needs a new engine. He has had a few customer's with similar issues with their Hyundais. He told me to tow it to the dealer and they would help me get the engine replaced. That same day,...

May 24 2024, while driving on Interstate95 at approx 70mph, I experienced catastrophic engine failure, with metal shards and screws shooting out, oil spewing, and smoke billowing everywhere. Loss of control of vehicle and nearly hit by passersby while trying to guide vehicle to swale. There were absolutely no warning lights or signals, and vehicle had just been serviced at Hyundai dealership at 77k miles (odometer reading 81k at time of incident). Independent mechanic diagnosed engine failure, hole in block, and provided attached photos. Vehicle was towed to Wallace Hyundai, in Ft Pierce, where it awaits dealer mechanical inspection.

I was driving about 45 mph when the car just turned off the first time. I was able to put it in neutral and start it back up to get to the side of the road and it died on me again. I was about 30 feet from my destination at this point so I got it where I was going and turned it off. When I turned it back on it was making a terrible knocking/grinding noise. It didn’t have a drop of oil in it (about a thousand miles after my last oil change mind you) so I put oil in it and started it again and the sound quit. I went to drive it and it died before I could accelerate to a decent speed, got it cranked and rolling again and it slowly got up to 40 mph, but the second I started to slow down...

I am losing engine oil all the time to the point the car engine shut off My engine start losing oil after 2000 miles 1000 miles before oil change [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2018 Hyundai Elantra. The contact stated that while driving at 70 MPH, the vehicle made an abnormally loud popping sound. Two other drivers alerted the contact that flames were coming from underneath the vehicle. The contact checked the rearview mirror and noticed smoke coming from the vehicle's rear end. The steering wheel then seized, and the vehicle lost motive power. The check engine and several other unknown warning lights were illuminated. The contact pulled over to the side of the road and exited the vehicle. No injuries were sustained, and no medical attention was received. The flames extinguished themselves. There were no police or fire department reports filed. The vehicle was towed to the dealer, where it was diagnosed with a seized crankshaft and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure....

AT LESS THAN 62,000 MILES THE ENGINE NO LONGER HAS PRESSURE AND THE CAR IS INOPERABLE. VEHICLE BEGAN STALLING 1 WEEK PRIOR TO CAR BECOMING INOPERABLE.

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.

Having issues in several instances the past few months , where my car abruptly stalled in highway traffic, again less than a month later while at a stop light, traffic built up, I became nervous an scared, finally after turning my car off an on several times I was able to get my car to stop stalling an drive away. Third instance has been the ammount of oil consumption my car is needing, I’ve noticed an increase use of oil for my car I use as a daily driver just commuting to a from work, an a clicking/knocking sound, other instances was my car accelerated at high rates of speed on the freeway on its own. Only after smash the break button was I able to disengage the throttle. An now just recently my car is using up more an more oil an has developed a hard knock in the...

Unfortunately I bought a Hyundai Elantra sport brand new in 2018 i’ve kept the maintenance even to this day the car currently at 147,300miles. However I started having issues at 30,000 miles check engine would go on the car with shake and stall and miss fires would occur frequently. Every time I took it to the dealer they reset the computer but never made an actual note of what was going on with the car. That dealership that I took it at the time was Universal Hyundai in Orlando, Florida. So now that I have 147,300 miles the same misfires are now catastrophic failures on the same cylinders, to add insult to injury I took it to a different dealer located in Sanford Fl so they can try to get willful engine replacement, and my claim was denied because I was out of warranty and over the mileage, the dealership...

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.

I got this car like 5 months ago and after driving it for 2 months I had to get a new engine for 4500 dollars. There is no way it can go bad in 2 months. The car only had 52,000 miles on it and it went bad when it reached 54,000 miles. After fixing that it went bad again after 4 months. I was also told that Hyundai Elantras are known for their engine problems. It would be great if there is an engine recall on this car. I am not trying to sell this car but I was this car to be fixed. Thank you!

Our hyundai elantra 2018 car started with a knocking sound while we were driving and it got worse our of nowhere when we accelerated and suddenly did this throttling sound with a pop. The battery light came on, the engine light came on and suddenly our car engine turned off and we were able to go on the side of the street we were on. Fumes were coming out of the hood and oil began to leak. The car was not able to be turned on to move it. We have towed it to our home, our local mechanic told us it was the engine. It has 135,000 miles on it. We got it from the dealership about 5 years ago and had not had issues until suddenly our engine blew!

When I drive my car shuts off in the middle of driving in traffic I almost got into an accident with my kids in the car The dealership doesn’t know what’s the problem they fixed a code of p0011 can anybody help because it’s a safety hazard with me and my family in the car please help feel like I’m just wasting money

I was at work when my wife contacted me and informed me that the car has started to make a ticking noise (shared car mind you) upon acceleration and start up. This all started on 1/4/2024. Well I checked the oil level and it was a on the line of being on the low side so I changed the oil as I needed to anyways and topped it off. I went to start to the car and ticking again, well I called around as I'm not going to ignore any sort of noise and was able to get a lcoal mechinic to look at it the next day as my local Hyundai dealership didn't have any opening until Saturday (1/6/2024). The next day I'm on my way to drop the car off to see where the sound could be coming from and the car shuts off. There were no warning...

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.