Engine And Engine Cooling Problems of Hyundai Elantra - part 2

The issue involves the hybrid electric powertrain or electrical control system in my 2023 Hyundai Elantra limited hybrid. The vehicle has shut off multiple times while driving, with complete loss of power and propulsion. This poses a serious safety risk, as it happens without warning in the middle of the road. Restarting the car requires shifting into park and trying multiple times to turn it off, but the vacuole turns back on the first try. I have experienced this issue several times, including twice during a 300-mile highway trip. After each shutdown, the dashboard displays multiple warning lights, including the check engine light, battery light, oil pressure light, and hybrid system warning (orange car icon). I took a photo immediately after the most recent failure to document these warnings. The vehicle has been inspected three times by two different Hyundai dealerships. Both confirmed the vehicle is under warranty but have not repaired or diagnosed the issue, citing that they cannot replicate it. They have driven it ~200 miles without success. However, they have not pulled ecu data or freeze-frame codes, even though warning lights were active at the time of failure. There are no symptoms or warning messages before the failure — the vehicle shuts off suddenly. The car is available for inspection, and I am in the process of opening a formal case with Hyundai. This is a significant and recurring safety hazard that must be addressed. This issue has an occurred a various speeds including during acceleration and braking. The picture attached is the dashboard after the I indent has occurred and have shifted to park after stopping to try and restart the car to get out of the middle of the road.

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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.

See all problems of the 2018 Hyundai Elantra 🔎.

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

Excessive oil consumption, shudder in motor while driving . Check engine light cam on. Visibility in headlights very low and high beams only working sometimes.

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The contact owns a 2010 Hyundai Elantra. The contact stated that while her son was driving 25 mph and depressing the accelerator pedal, the vehicle failed to respond as needed and the engine seized. The contact stated that while her son was attempting to start the vehicle, he heard a rattling sound coming from the engine. There were no warnings light illuminated. The vehicle was towed to an independent mechanic where it was diagnosed that the engine had failed, and an undisclosed part connected to the timing belt had detached and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that because the NHTSA had not completed the investigation into the failure, a recall was not issued. The approximate failure mileage was 99,500.

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The contact owns a 2017 Hyundai Elantra. The contact stated that the check engine warning light was illuminated. The contact stated that the vehicle was intermittently shuddering while accelerating. The vehicle was taken to a certified mechanic who diagnosed that the timing belt and exhaust camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the dealer who confirmed the diagnostic results. The manufacturer was notified of the failure and opened a case. The failure mileage was approximately 108,000.

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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.

Car stop working once I got home I notice while I was driving the car kept back firing and jurking while driving . Had a mechanic look at the car he tried to start it but it started and shut off. . He even tried to jump start the car with the jumping cables but it will not start. . He told me it was electrical. . I have a brand new battery and a complete tune up on the car. . I have not been able to drive the car in 3 weeks.

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The contact owns a 2017 Hyundai Elantra. The contact stated that after starting the vehicle, the vehicle lost automotive power and then lost power after driving a short distance. No warning light was illuminated. In addition, there was an abnormal sound coming from the engine. The vehicle was taken to a local independent mechanic; however, the failure was not replicated. The contact stated that the vehicle was previously taken to the same independent mechanic, and the spark plugs were replaced. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 150,000.

The knock sensor detection system (ksds) software malfunctioned by failing to detect abnormal vibrations or knocking sounds. As a result, there was significant internal engine damage that caused the vehicle to seize unexpectedly in the middle of traffic on 4/10/25. The car started and abnormal noises were noted from the engine though not significant. Week later, car stalled several times on interstate. Prior to the failure, the vehicle exhibited a progressive knocking noise in the engine. After seizing, the vehicle would struggle to start, idle briefly, then stall. It also randomly shut off while driving, creating a serious safety risk. The vehicle was taken to precision tune auto care, where technicians confirmed problems with the crankshaft, excessive oil consumption/leakage, and metal shavings in the oil, which they attributed to rod bearing and crankshaft wear consistent with Hyundai campaign 203 (improperly heat-treated piston rings). Despite the ksds being installed during the initial recall remedy, the system did not activate prior to engine failure. Additionally, no engine or oil warning lamps were illuminated. An oil change was performed at the time, but the vehicle had already burned through excessive amounts of oil since the prior change. Precision tune auto care advised me to take the vehicle to allen turner Hyundai. At the dealership, staff confirmed issues with the engine but refused to acknowledge recall campaign 203, even when presented with documentation. They also failed to address the malfunctioning ksds system or the lack of functioning engine/oil warning lamps. They were asked to perform inspection relating to piston ring and rod bearing, though refused. This situation raises major safety concerns, as my engine seized in the middle of traffic without warning. Other owners with a malfunctioning ksds system could face the same risks, leading to sudden engine failure, potential engine fires, or serious traffic accidents.

Abs and traction control lights on as well as e brake light this is all after I had recall work that was supposed to fix this problem but only made it worse I am dealing with Hyundai but I don’t see a solution for this problem my car is inoperable and very unsafe it is my main source of transportation to and from my place of work and without this vehicle I am at a great loss I have lost brakes completely at times and am mentally and physically unable to drive this car it’s that bad financially strapped from sinking money into this problem only to find there’s a recall but the recall work didn’t fix the problem and Hyundai knows it won’t fix the problem.

See all problems of the 2015 Hyundai Elantra 🔎.

Driving on interstate at 70mph. Multiple, five or six, warnings pop up in rapid succession mostly dealing with the safety features such as distance to car in front, adaptive speed control, lane keeping. The last one was hybrid system - safely stop. The car then immediately lost all acceleration power leaving us coasting. This all happened within a few seconds. Terrifying. Luckily we had space to get over quickly. 30 miles sooner we would have been in downtown jacksonville with no place to maneuver. Extremely dangerous. A few seconds warning then nothing. Turned the vehicle off as soon as we stopped and car was completely dead, no electrical power to anything, including flashers. Not sure how you can’t have flashers on a hybrid. Basically no warning to no power at highway speeds and then no flashers. Something is seriously wrong with this.

See all problems of the 2022 Hyundai Elantra 🔎.

A significant class action settlement, known as the Hyundai engine ii class action settlement, was established to address allegations of engine defects in various Hyundai models. This settlement includes vehicles equipped with the nu 2. 0-liter gdi engine, such as the 2014–2020 Elantra gt. The lawsuit claimed that these engines could suffer from issues like engine seizure, stalling, and potential engine fires. My vehicles engine is the engine listed above and has been experiencing those exact problems. My engine has been stalling and making a knocking noise. A professional mechanic evaluated my vehicle and diagnosed it with first stage engine failure. Engine failure of any kind while driving is extremely dangerous and could lead to sudden stopping on a highway, collision, and result in the loss of life of both the driver and other drivers sharing the road. In addition to the engine ii settlement, there was a separate class action settlement related to the theta ii engines, which are also found in some Hyundai vehicles. This settlement addressed allegations of engine defects that could lead to engine failure. Hyundai motors is refusing to honor their warranty coverage for my vehicle. They claim their refusal is due to my vehicle having a rebuilt title, however, nowhere on their website or per any other guidelines do they explicitly deny coverage for rebuilt title vehicles. They clearly state that only salvage titles and 'total loss' vehicles will not receive any warranty assistance, which my vehicle was never considered a total loss. Additionally, when speaking to a bob howard Hyundai representative, they informed me that they have previously honored warranties for people in my exact situation. The engine in my 2014 Hyundai Elantra gt is the original engine with a matching VIN number and the engine failure is strictly due to the malfunction of said part produced by Hyundai motors. I have maintained and preformed regular maintenance on this vehicle with receipts.

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While driving in a parking lot. The car wouldn't accelerate. Kept pressing on the gas pedal but the car wouldn't move. After about 5 seconds the car shut down. I had to place the car on p then press the start button, pressed the brake pedal and then the start button again and the car turned back on.

See attached document for complaint.

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 from the beginning, the vehicle experienced a series of mechanical issues. These included engine stalling, warning indicator lights, rough idling, and decreased fuel efficiency. I consistently took the car in for service and maintenance, yet the problems worsened. In the days leading up to the failure, the vehicle had trouble starting, made abnormal noises, and eventually stopped working entirely. 3. Risk to safety the failure of the vehicle to start without warning has placed me in unsafe and potentially dangerous situations, including being stranded in public places. The risk of the car stalling during operation could have endangered not only my safety but also the safety of other road users. This is a serious safety concern that should not be ignored. 4. Diagnosis confirmation the diagnosis by north freeway Hyundai confirmed that the engine failure is complete and that replacement is necessary. The service notes also included a recall campaign (24-01-009h-1) for anti-theft software and decals. These issues further demonstrate.

My car started hesitating when shifting gears in Smart and normal mode smelled like something was burning. Car only drives in sport mode, shifts hard, engine lags, and the check engine light has not come on. This is the second incident with this car. The first time I lost all power to the car and the entire electrical system shut down, when it was towed to the dealership they said nothing was wrong with it. I keep up on all the maintenance.

I experienced engine failure with this make and model out of no where. Seen online recalls in the past for same make, year, and model. Dealership and and corporate are not helping me one bit, threatening to charge me for storage, lied about my corporate case being denied, when I have email evidence it was still open, and now zero contact back from Hyundai corporation. I'm trying to seek legal advice and would love any help moving forward struggling gravelly from all of this. Thank you so much ??.

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The contact owns a 2022 Hyundai Elantra. The contact stated while her daughter was driving 63 mph, several unknown warning lights illuminated, and the message that the vehicle was in neutral was displayed. The contact pulled over to the side of the road and waited for a tow truck to arrive on the scene. The contact stated that a police officer showed up on the scene because the vehicle was blocking the right side of the roadway. The vehicle was towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure but offered no assistance. The contact was referred to the NHTSA hotline to report the failure. The approximate failure mileage was 34,000.

On 03/22/2025, I took my car into riverside Hyundai because of engine shuttering. Riverside Hyundai discovered foreign fragments in my cylinder from the piston and stated they had never seen this issue before. Their diagnosis was engine replacement at an estimated cost of approximately $7,500 for the engine and $3,168 for labor for a total amount of $10,668. Searching for answers, I quickly came across the Hyundai Elantra piston defect class action lawsuit (brown v. Hyundai motor America), which pertains to an engine piston defect not properly heat treated affecting the same year and make of my 2019 Hyundai Elantra. The class action lawsuit related to a defect found in certain Elantras equipped with nu 1. 8l engines. Although this defect is specifically tied to issues within the pistons, which are a critical component of the engine responsible for generating the force necessary to power the vehicle. The defect can ultimately result in “total and irreparable engine failure. ” this failure leads to a loss of engine power, power steering, and brake assistance, all of which pose significant safety risks. While this class action suit has settled, and is an important step in addressing the engine defect that has already impacted many vehicle owners, I believe that the scope of the class action lawsuit was not broad enough, as it failed to include all vehicles that could potentially be affected by the same or similar defects, specifically Hyundai Elantras with different engine types, like the one in my 2019 Hyundai Elantra. Although my Elantra is equipped with a different engine, I believe that the defect that was present in the class action suit, is the same defect that caused this damage to my engine. I also came across images of the defect online which seem identical to damage caused to my engine. Please see attached files for your review. Riverside Hyundai has denied my request for a good faith replacement engine and are still waiting on a reply from Hyundai.

Engine light keeps coming on. . . Took back to dealer twice coil misfiring had to be replaced car was bought in 2018 coils were replaced twice in 2020 because of check engine light and car not running in 2024 coils had to be replaced again because of engine failure 2025 blinking check engine light on again engine failed needs to be replaced maxon Hyundai refused to replace the engine. ,. Car has 86,000 miles does not meet the 100000 threshold.

Bought a 2016 Elantra in 2020 with 44,000 miles on it and a clean repair/ maintenance history. Let me preface the rest of this by saying I am an ase certified mechanic of 15 years who has been in the industry even longer. The first major issues I incurred with the vehicle happened approximately one year after purchase. The lifters started tapping and not long afterwards (about a week) I had a total engine failure on my hands. I was almost killed by a passing semi truck that was merging on to the interstate but was luckily able to avoid it and get the car on the side of the interstate where I had it towed to ralph sellers Hyundai in baton rouge louisiana. Long story short , even though the second owner is entitled to a 5 year, 60,000 mile warranty, they made me pay for a new engine. Here we are only 19,000 miles later and the same issue is occurring; except this time due to the stress the failing engine is putting on the torque converter the transmission is now failing to do its job properly. I have been back to the dealership but they offered no help except lies (they told me my high pressure fuel pump was bad, this model doesn't even have one!!!!!) I fully intend to sue Hyundai of America unless some appeasement can be made. Do not ever buy a Hyundai, they are trash cars made to look nicer than they are. Additional details will reflect most recent incident with engine/transmission.

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Oil filter cartridge housing is leaking from the top.

Burning oil at any unacceptable rate. I have made sure to have preventative maintenance and oil changes done every 3k miles. Hyundai needs to address this problem that appears to be plaguing many drivers.

No warning light for oil consumption and it depletes rapidly. Also, high beam lights stopped working and you have to hold the signal in place and the high beam still doesn't turn on. Ive had so many issues with this car since purchasing it, it ridiculous and saddening how there hasn't been any recalls and the issue before this one was dangerous and life threatening. Also, since it's purchase it consumes oil at a rapid rate that has been documented and each time I've visited the repair shop they informed 'there's no oil' in the vehicle and no oil light or anything comes on to warn me. I find out about it because of an entirely different issue needing to be fixed.

Issue with engine burning oil after I passed 104000 miles. I had my oil changed just after 100000 with no issues and just before the 104000 mile mark my Elantra began to make a clicking noise and my oil light came on. I took it to get the oil changed and I was told I was completely out of oil. I began monitoring the issue every few days and after traveling about 300 miles in a day I rechecked the oil level and noticed a definite drop in level. I contacted the dealer and was told nothing could be done due to the fact it was over 60000 miles and there were no active recalls. There is an TSB posted for the issue already. As well as there are recalls for the 2014-2016 hyandai Elantras burning oil after 100000 miles.

The contact owns a 2020 Hyundai Elantra. The contact assisted in jumpstarting another vehicle with battery failure. The contact stated that the vehicle failed to start the next day after several attempts. There was no warning light illuminated. The contact stated that the tpms warning light had been illuminated prior to the failure. Due to the failure, the vehicle was towed to two separate independent mechanics who informed the contact that the engine had failed. The dealer was notified of the failure and the contact was informed that there were no recalls on the vehicle. The manufacturer was not notified of the failure. The vehicle was not repaired and remained with an independent mechanic. The failure mileage was approximately 130,000.

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.

The contact owns a 2019 Hyundai Elantra. The contact stated while driving at various speeds and depressing the brake pedal, the vehicle made an abnormal rubbing sound and hesitated to respond, causing the braking distance to be extended. The brake warning light illuminated. The vehicle was not diagnosed or repaired. Additionally, the contact stated that the internal trunk release lever was inoperable. The contact stated that the trunk required to be slammed manually to close securely. Additionally, the contact stated while accelerating from a complete stop, the vehicle was significantly sluggish. The contact stated that the failure recurred while driving at various speeds and depressing the accelerator pedal. The contact also stated that the vehicle was overheating while driving. The check engine warning light was illuminated. The Hyundai dealer was notified of the failure and informed the contact that a fee would be charged for diagnostic testing. The vehicle was taken to a used car dealer, sandy sansing automotive (6200 pensacola blvd, pensacola, FL 32505), where it was diagnosed that the catalytic converter had failed and needed to be replaced. The dealer determined that the catalytic converter and unknown parts needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA campaign number: 21v301000 (engine); however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was approximately 147,000.

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.

Timing chain looseness, sudden loss of engine power/motive power. Vehicle was sold, unknown if available for inspection. Engine failure on and in the middle of the interstate/highway, and this caused a major crash risk, and safety hazard. This make and model of vehicle has multiple reports of similar incidents. The repairs would’ve cost over 3 times the value of the car. As stated by the vehicle manufacturer, the entire engine would need to be replaced, with a factory built engine in order to comply with NHTSA and safety regulations. I’m no longer in possession of the vehicle. It was sold. While the vehicle was operating, and drivable there would be a chime and a flashing check engine light/indicator on occasion. Although no codes were present at maintenance center, therefore unable to identify the exact cause.

The contact owns a 2019 Hyundai Elantra. The contact stated that while driving at 60 mph, the vehicle inadvertently lost motive power. The vehicle lost power in the middle of the roadway, where the vehicle failed to restart. The low oil pressure and check engine warning lights were illuminated. The vehicle was towed to an independent mechanic to be diagnosed. The contact was informed that the engine had thrown a piston rod. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA hotline for assistance. The failure mileage was 140,000.

Vehicle routinely (3,000-5,000 miles, depending on oil used) maintained by qualified mechanics. Around 129,000 miles the engine began to knock / rattle. Mechanic was unable to determine the cause, but the rattle was only present between 0-40mph and would settle at higher speeds. Mechanic also noted the absence of sludge. Around 133,000 miles the vehicle stalled. The vehicle would start, but would stall again. Mechanic diagnosed timing chain failure and that the vehicle is burning oil. Vehicle has never indicated low oil, but it is now manually checked and burning about a quart of oil per 1,000 miles. Replaced timing chain and vehicle has continued to operate. Around 134,500 miles some power loss during low-speed acceleration and a slight engine rumble at lower speed. Mechanic diagnosed a wrist pin failure on cylinder 2. Vehicle may be inspected upon request. Vehicle stalls create some safety concerns, but have only occurred at low speeds. Vehicle timing chain was diagnosed by two different mechanics. When the vehicle was brought to a Hyundai dealership for a trunk latch recall in may of 2024 at 125,000 miles, no issues were noted. Vehicle has not been inspected by the manufacturer, police, or insurance represenstatives since may of 2024, with no reported issues. No check engine notifications or warnings appeared until the vehicle stalled. Prior to slightly decreased acceleration, the only notable indicator of an issue is the persistent engine rattle (knock, piston slap). The engine rattle began in February of 2025.

I purchased this car in 2019 and 2-3 days later I started to experience the engine stalling, I contacted the dealer, and they checked it out by test driving it and said there was nothing wrong with it, it has still been happening, now more frequently > I have to constantly change the oil before the due time to see if it helps but it is becoming a bit dangerous for me and my family when it stalls as I'm trying to accelerate. I would like some assistance from Hyundai.