Hyundai Sonata Complaints (2018)

384 consumer complaints on file.

#11659435May 7, 2025
UNKNOWN OR OTHER
Panoramic sunroof came loose on highway and bent up 90 degrees making vehicle undrivable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657617April 29, 2025
ENGINE
This engine consumes oil rapidly to the point i have to add quarts of it constantly . This results in the spark plugs deteriorating at a rapid rate and the coil packs as well. The car only has 75,000 miles but the problems began to start around 69,000 miles because of these issues and the engine and burning oil because of the rings and pressure it begins to shake rapidly and sputter and stall out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656049April 22, 2025
ENGINE, POWER TRAIN, STEERING
The engine stalls when driving, loses power, hard time to start. It uses an extensive amount of oil. Losing power/stalling can result in accident or fire in my engine. Yes check engine light came on said it was coils/plugs changed them 2xs already. Took it to a mechanic was told there’s a recall on engine it’s a valve that is not getting air through that can potentially case a Fire in my engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656177April 22, 2025
POWER TRAIN
The car went into limp mode they have problems with the knock sensor and that is what it threw to the computer and I changed the sensor and went away and now limp mode again and computer says basically the same thing there is a software update and the engines are failing
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654091April 11, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2018 Hyundai Sonata. The contact stated that the vehicle needed multiple attempts in order to start. The contact stated that once the vehicle was started, she noticed that the low engine oil pressure light was illuminated. The vehicle was taken to a local dealer, where it was determined that an oil consumption test needed to be completed. The vehicle was not repaired. The contact had stated that prior to the oil test being recommended, she had observed that the vehicle was consuming approximately five quarts of oil per 2,000 miles. The manufacturer was notified of the failure. The failure mileage was approximately 57,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11651132March 27, 2025
ENGINE, POWER TRAIN, FUEL/PROPULSION SYSTEM
My 2018 Hyundai Sonata (approx. 60,000 miles) began consuming excessive oil, and the engine started smoking while driving. My wife barely made it to the dealership — the car was unsafe, struggled to stay running, and visibly smoked from under the hood. Hyundai acknowledged the oil issue but refused to cover engine replacement. Instead, they approved a one-time combustion chamber cleaning and requested we drive the car 1,000 miles to "see if it gets better." This is a major safety concern. The vehicle is part of a group of Hyundai models known to have defective Theta II engines that have led to engine failure, fire risk, and recalls. This issue is widespread, and Hyundai is not taking proper responsibility for defective engines in cars like mine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11650687March 26, 2025
ENGINE
The engine is burning through oil at a rapid rate. I probably get 2,000 - 2,500 miles before it needs a complete refill and the problem is getting worse. I was not due for an oil change recently around 2,500 miles and my engine started shaking, took it to the shop and the oil was gone without the oil light going off. This resulted in me needing to replace spark plugs and all engine coils. The repair shop recommended I sell my car because of the amount of Hyundai's he sees with this issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11650702March 26, 2025
ENGINE
The contact owns a 2018 Hyundai Sonata. The contact stated that the oil pressure was prematurely lower. The contact stated that while performing the oil change as an independent mechanic, the contact noticed that there was a significant amount of oil in the oil catcher, and the oil pan was fractured. The vehicle was taken to the dealer, where the contact was informed that the oil pan replacement was not covered under warranty. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: DP22003 (Engine). The manufacturer was notified of the failure and a case was filed. The failure mileage was approximately 64,400.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11649138March 18, 2025
ENGINE, STRUCTURE:BODY
The engine burns oil, I have to get spark plugs every two months, and put oil in it almost every week. The check engine light is now flashing and is throwing more sensors. The paint on this car is also all peeling off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648627March 17, 2025
ENGINE
2018 Hyundai Sonata Registered owner [XXX] Vin [XXX] Which qualifies for a replacement engine under the "recall" and "class action" due to engine oil consumption damage. On [XXX] I was driving home from California, and my 2018 Hyundai Sonata made a loud noise and stalled on me while driving on the freeway. On Jan 2, 2025 I towed my 2018 Hyundai Sonata to ABC Hyundai for repairs. I was told the engine failed or locked up. I have a drivetran warranty up to 150k. My vehicle currently has 115k. However, Hyundai denied the engine repair stating that I neglected the maintenance on the vehicle. They were requesting oil change receipts from 2018 when I bought the car. I've submitted all oil change documents that I could find. Most auto shops have purged their system, updated their software and also got entirely new systems, therefore those receipts were not found. Carfax also has a record of oil changes. I did not always take my vehicle to the dealer for oil changes since our family has a certified mechanic that can vouch for all the other oil changes done on the vehicle. Including tune-ups. The dealer and I have provided several oil change receipts approx. 18+ carfax, Hyundai, family mechanic and misc. receipts. That's should be more than enough evidence for Hyundai to honor their warranty. Please help. NOW HMA says t claim for oil consumption and repairs were denied due to the vehicle being outside of warranty based on time and mileage. Once a claim is denied that is the final decision from HMA. This is untrue my vehicle is NOT out of warranty. Due to the oil consumption class action, and faulty engine put in ny car, the drivetran warranty was extended to 150K, and my vehicle is only has 115K and 7 years old. Hyundai put a bad engine in my vehicle to begin with. A few months ago I got a oil change at Firestone, 4 weeks later there wasn't a drop of oil in my car, that is a problem. Everytime I got a oil change, I had to extra oil after 3-4 week INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648673March 17, 2025
BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING, LANE DEPARTURE: BLIND SPOT DETECTION
BSD system stopped working one day along with the Rear Cross Traffic Alert.The button which operates system does not come and system does not work. Warning lamp lit on instrument panel and said" check B SD system" meaning the whole system doesn't work. Took to my local shop and they couldn't repair as they stated the system is a proprietary system the had no software. service bulletin #19-BE-009H was issued in 5-19 by Hyundai for this issue with car. So there is a know problem
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648883March 17, 2025
ENGINE, POWER TRAIN
I was going 80 mph on the interstate and suddenly my car went into limp mode and shooked really hard and dropped to 60 mph. I had to swerve to go onto the side of the road. The car behind me almost rammed into me. I contacted hampton hyundai for days to schedule an appt. I finally was able to drop off my vehicle to them but now they are telling me they have to do an oil consumption test but my car is in limp mode and it shakes when I drive it. The car is dangerous and they are trying to charge me $500 for a fuel pump replacement ( which I have a warranty of but they notified me that does not count but it matches exactly the possible reason). As you can see in the documents, they did not note that my fuel pump was broken. They just asked if I wanted to pay it so they can get started. I get normal oil changes done. They haven't even done a rod bearing test but just looked at the knock sensor and was telling me that they wanted to charge me to get that changed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644268February 22, 2025
UNKNOWN OR OTHER
When I bought the car from Mathews in Marion Ohio the car looked like it was already in some form of accident due to a previous owner and I was unaware what caused the accident or any other problems with the vehicle upon buying. I was not presented with a carfax. I have electrical tape at the bottom of my bumper and there’s a problem with acceleration. It accelerates by itself and veers right when I take my hand off the wheel. I’m afraid to drive my car on the highway. I have complained about this problem to Mathews twice. I am now in a loaner until they figure out what’s going on.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11643221February 17, 2025
ENGINE
Car does not when temperature drops below 30 degrees (Fahrenheit) even when garaged so you cannot drive car and u have to be towed several times at night. Local dealer stated unaware of issues but there is forum of Hyundai owners who have this problem with 2018 sonata. A local mechanic studied issue and did replacement on the relay switch and starter and now car starts in cold weather. It took me four years is stress and I put in complaint to Hyundai and they did nothing to compensate me for parts. This is a very big issue to be somewhere called late at night and not have reliable transportation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640729February 4, 2025
ENGINE
Possible engine recall engine makes nose continuously stay low on oil.Bulletin came out about possible engine recall
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640340February 3, 2025
UNKNOWN OR OTHER
I looked up my car on carfax and it shows a 3 different odometer readings. on 10/14/19 it had 15.125 miles. On 03/04/21 it had 61,284 miles. On 02/01/2022 it had 30,371 miles And finally on 3/3/23 it had 38,269 miles. This clearly shows that somewhere along the line, the odometer was changed. My car has been on the shop on several occasions in the less than 2 year time frame
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11639130January 28, 2025
ENGINE, SUSPENSION
The contact owns a 2018 Hyundai Sonata. The contact stated while driving at an undisclosed speed, the vehicle lost motive power. The check engine warning light was illuminated. Additionally, engine oil was leaking onto the ground while the vehicle was parked. The contact stated that the dealer had previously replaced the spark plugs, and cylinders #3 and #4 twice, and an independent mechanic had replaced the front driver's side CV axle. The vehicle was towed back to the dealer, who determined that the engine had internal defects. The contact was informed that the engine and front CV axles needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but refused to replace the engine. The failure mileage was approximately 86,800.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11638290January 24, 2025
STEERING
Lost control of the car - the car was brought in to Hyundai Maxon in Union, NJ and were told the steering column was defective and the car is not safe to be driven, needed a steering column replacement. Dropped the car off 12/12/2024 and was quoted for the replacement of the part (with a new one). On January 17, 2025—36 days after the dealership had my car—I was informed that the required part was unavailable nationally, with no ETA for availability. The fact that this critical part is unavailable at a national level raises significant concerns. Is this indicative of a broader manufacturing issue? Hyundai has provided no explanation or transparency regarding why this part cannot be sourced, further compounding my frustration as a loyal customer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11637409January 21, 2025
SEAT BELTS
The contact owns a 2018 Hyundai Sonata. The contact stated that upon entering the vehicle, the contact became aware that the driver’s side seat belt failed to latch securely into the buckle. The seat belt warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the seat belt buckle. 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 45,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11636198January 16, 2025
ENGINE
2018 Hyundai Sonata with only 128k miles already needs a new engine due to oil consumption. I have done the regular maintenance on the car and have only put roughly 25k miles on the car since owning it
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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