In winter of 2018, my husband and I purchased a certified pre-owned 2017 Hyundai Sonata, and from the moment we drove it off the lot, it had an oil consumption problem. Then, in 2023, the spark plugs began failing. Each time this happens, the whole car shakes and stops running. We found out that Hyundai and Kia engines from 2009-2022 have major problems and that there are many class-action lawsuits against the manufacturer. We contacted both the dealer and Hyundai corporate to find out how we could fix the engine. We have small children and just wanted to repair our family car. The dealer refuses to fix it. They told us that it's Hyundai's problem. Hyundai acknowledged that we are eligible for a new engine but that until a certain rod fails and the whole engine implodes, they can't do anything about it. We have this in an email from corporate. We recently welcomed a new baby and had to buy another car because we felt this Sonata was not a safe choice to drive our children around. The solution to this problem should not be driving around in an unsafe car until it completely stops working. I'm hoping that the NHTSA can help me by sending out an inspector who can attest that this is a safety issue.

- Webster Groves, MO, USA

Car is leaking oil and burning oil..had oil changed recently and it is below the full mark

- Tucson, AZ, USA

Se consume el aceite en periodo de 8 días, Se quemas las bujias El carro tiembla Sale en pantalla el botón amarillo del motor que hay falla Ya me ha pasado varias veces ando con mis dos hijos menores de edad en autopista y ya he quedado varada en varias oportunidades y esto me está generando un gran riesgo estoy hubicada en jacksonville florida

- Jacsonville , FL, USA

Excessive oil consumption Engine light stays on. Noise in Engine GDI 2.4

- Houston , TX, USA

On February 27, 2023 we went to the Hyundai Dealer because our engine was leaking oil and we were told by Pep Boys that the Rear Main Seal was leaking. The Dealership scheduled us a service appointment three wks later, on March 23, 2023, when they replaced the valve cover gasket and the high pressure fuel pump gasket. On Jul 15, 2023, 2.5 months later, we return to dealership because our engine was leaking oil again and had leaked into the spark plugs tubes. They replaced the valve cover gasket again. Two weeks later on July 28, 2023, we went to the Dealership because the engine light turned on and the engine was misfiring while driving. They did nothing but added 3 quarts of oil because our oil was low despite us changing our oil 1 month prior (June 28, 2023). On September 25th, we returned to the dealership because our engine light turned on and our engine was violently shaking while making noise. At this point, we were frustrated and did not feel safe driving the car. We pleaded with the Service Manager to replace the engine from all the issues we have been experiencing including having to constantly add oil or change oil every 2.5 months. They held on to our car for 1 wk and gave us a rental. After inspecting our vehicle they replied that there was no engine issue detected so the Manufacturer will not replace the engine under the warranty. They only replaced the spark plugs and charged us with the service, parts & rental costs. It is now Monday, Dec 18, 2023, 1 wk before Christmas, and our engine light turned on once again while driving with our toddler in the vehicle. The engine not only misfired but did not allow us to accelerate beyond 30mph during high traffic hours on a road with a 50mph limit. The next service appointment available is 10 dys away, Dec 28, 2023, and they are asking us ~$400 to service the car. We feel helpless with the dealership/manufacturer, they are refusing to replace the engine. We fear that they are waiting for the warranty to expire.

- Valrico, FL, USA

First time I took my vehicle to the shop for over consuming oil they replaced the oil and cleaned all the parts. A few months after this my car would not accelerate properly and had a loud knocking noise in the engine and check engine light came on. After taking it to the dealer I was told I would need to replace the whole engine. I have proof of proper care done on the car but since I am second owner it is not covered in the original warranty. My car could have stalled and resulted in me and my family injured at the least. Hyundai knows about these issues and needs to recall the engines.

- Milton, FL, USA

The vehicle has twice been disabled while driving due to -??lost communication with hybrid module powertrain control module.-?? This breakdown is a significant safety hazard as the car loses power and coasts to a stop without any warning. The second time was on a 65 mph highway. Neither time has had any warning before the malfunction lights appeared. The first time occurred on 10/7, and the vehicle was towed to the dealership. Nothing was done besides clearing the trouble codes and test driving with the car, which returned at the end of October-?"the second time the breakdown occurred about a month later on 12/3. This second time, I removed the code myself on the roadside so as not to be in more danger, and I am currently awaiting an update from the dealership-??s service department on their next steps after initially being told to just have it towed in again. Losing power without notice is incredibly concerning. I want to report this safety issue and determine my next steps to resolve it, as this has dramatically impacted my trust in the vehicle and its safety.

- Saint Charles, IA, USA

I have a 2017 Hyundai Sonata I bought brand new. My car started burning oil where I was having to put oil every time I put gas which is weekly. I did the oil consumption test where I drove it 1000 miles 3 times and it burned 1.75qts, 2 qts, and 2.75 qts. They are saying it needs a new engine.

- El Paso, TX, USA

About a year ago during an extended freeway drive I noticed my engine started to sound different. I checked the oil and found it was a quart low which had never happened before. I filled the oil to its proper level and continued driving. About 100 miles later I decided to check the oil again and found it had used about 1/4 quart. Later my check engine light came on and it showed a code related to failed exhaust sensors. Since then I have had to check and fill the oil every 100 miles or so and now carry 5 quarts of oil in the trunk. I also noticed that my exhaust leaves an oil mark on the ground if I leave the engine running for a couple of minutes. I checked for oil leaks and didn't find any. My miles per gallon reading is also down. Seems to use most oil during freeway driving. I worry the engine could fail at any time and have been forced to restrict my driving to short local trips. I had the knock sensor installed per Hyundai's recall. Hyundai refuses to cover an oil consumption test.

- Palo Alto, CA, USA

My Hyundai engine is burning through oil like crazy. Only at 84,000 miles, and everytime I get my oil changed (every 3,000) it is completely dry. This is a known problem with Hyundai, and there needs to be a recall on these vehicles. It is costing me a fortune, and the risk of having my engine fail/catch on fire is not something I want to be worried about everytime I drive my vehicle. Something needs to happen to get this issue resolved.

- Mechanicsville, VA, USA

HEV lights came on stalled car and stated to turn engine off, barely made to a parking lot. Car was towed, in shop Dec 29, 2022 to Jan 10, 2023. knock sensor replaced, rusty spark plugs slots cleaned out, no communication with power train, case #20817405 June 16, case# 21597503 part A: Hev lights again chugging and stalling. Car towed in shop 22 days, returned 7-5-22.actuator 2nd time failure, knock sensor issue, clogged, emissions were cleaned: part b: Aug 14, to Oct 4 2023HEV system lights again, car stalled and died then towed : combustion cleaning 2nd time, spark plug corrosion replaced 2 time issue, 4 injectors replaced, recommend replace manifold (which I cannot pay for) dealer tech test drove 2 days and put 211 miles on car, more than we do in normal week driving to work and shopping In shop this time 52 days. This car has been taken in for all recall campaigns. Work done at same dealership every time. Is a sonata Hybrid SE I am attaching two files if you need more Please let me know. Your date entry below does not allow for each of the 3 times in shop total roughly 85 days four months Would like Hyundai to buy car back as no trade in value now and I cannot afford more rental fees and repairs and the balance due of $495.75 from 1st rental. Car just entering 6 year when first issue started.

- Union City, TN, USA

Was serviced by Hyundai in March 2023 to for oil sensor light but was really the oil was being burnt inside the engine Hyundai ran 2 oil consumption test in May 2023 and June 2023 which the car failed both. Service manger sent paperwork to Hyundai letting them know that engine was faulty because paperwork was summited with the wrong mileage the replacement of the engine has not happen. So Service manger has asked me to continue driving 1k miles and checking if engine is still burning oil which it still is I continue to write the service manger and sending pictures I can not drop my car off because we only have one car and they rarely have loaners and we are in bankruptcy so renting a car with a debt card is expensive trying to let people aware that this is a problem that Hyundai knows they have on these Sonata since 2015

- Mansfield, TX, USA

Engine Shut Off Without Warning problem of the 2017 Hyundai Sonata Hybrid While driving the car on the freeway, it will jerk forward and then shortly after lose power. I pull over (luckily haven't been killed yet) on the side of the freeway. I've taken my car to a Hyundai dealership third times. All Three time I was stranded on a busy california highway. I have looked into this warning over a year and no one seems to know the problem. This should be a recall and all Hyundai dealers should be made aware of what this warning is. We as Hyundai owners need answers and help.

- Diamond Bar, CA, USA

Engine has a serious oil consumption problem. The engine has consumed 12 qts last 5,000 miles, or roughly burning 4 qts per 1,500 miles! Twice already it has rendered the engine dry despite frequent oil checks. Car also has routine oil changes every 3-5,000 miles. The safety concern is that the engine seizes in the middle of traffic. Also, because of the rapid nature of oil consumption, it requires travelling with emergency oil replacement supplies within the cabin. Fear is a collusion in the back (especially if stalled!) that could result in a fire, fueled by the supply of oil in the car. We keep at least a gallon (4 quarts), more if we are travelling anywhere more than an hour. We are a one car family and the safety issue is real. This is an ongoing problem since at least April of this year. Engine needs replacement.

- Bartlett, TN, USA

The contact owns a 2017 Hyundai Sonata. The contact stated while driving 45 MPH, the instrument panel flashed and then the vehicle became inoperable. No warning light was illuminated. The vehicle was not able to restart and remained on the side of the road. The vehicle had not been diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 149,000.

- Patterson, LA, USA

Persistent oil loss - requires constant refilling

- Palm Harbor, FL, USA

Engine has been burring oil from the car went to get an oil change on 9-17-2023 last night engine light came on 10-04-23 there was no oil in the engine and dipstick was dry this has been happening now since March of 2023 Hyundai has been made aware of this problem by there own service team. The odometer read on the day of the oil change 9-17-23 131,571 miles last night when I add oil it was at 132,448 miles this is less than a 1k miles at 877 miles my engine burn 5.1 qts of oil.

- Mansfield, TX, USA

Vehicle Safety Complaint - 2017 Hyundai Sonata Sport Engine Failure Dear NHTSA, I am writing to report a safety concern regarding my 2017 Hyundai Sonata Sport, which I believe poses a risk to my safety and the safety of other road users. I have experienced the following issues with my vehicle: First Issue: Excessive oil consumption Must add a quart a week with minimal driving. Engine consumes an abundance of oil. Serious risk of internal engine damage & risk of the engine failure. Noticable oil covering spark plugs. I have to clean oil off the spark plugs weekly. Second Issue: Flashing check engine light Loss of power, engine stalling, misfiring, diminished ability to acclerate from a stop, and smelling gas. This is a traffic hazard, risk of life to occupants of vehicle, possible engine fire risk, and complete engine failure. Upon research, this is a MASS issue with owners of 2017 Hyundai Sonata's with a Theta II 2.4-liter engine. The Theta II 2.4-liter engine for Hyundai Sonata Hybrids has been recalled. However, Hyundai is very aware of the engine issue with non-hybrid 2017 Hyundai Sonata's. We have taken this to a AAA shop and the code issued was "catastrophic engine failure." I then took it too a Hyundai dealership and they said it was fine. I opened a case with Hyundai US and after months of back and forth, I get the same response, take it to the dealer. Frankly, I am getting nowhere with Hyundai. I feel they have recalled so many vehicles and their dealerships are so overwhelmed they are avoiding acknowledgement of this issue for non-hybrid models as long as possible putting the safety of Americans at risk. There a millions of consumers who have put their faith in the safety of Hyundai's engine for my make and model with this Theta II 2.4-Liter engine. Hyundai is 100% aware of these issues and hasn't issued a recall. Dealerships are flooded with vehicles and wait lists are long. American families need safe and reliable transportation.

- St. Louis , MO, USA

While driving the vehicle on the highway, the check engine light began flashing and the car immediately lost almost all power. We had enough power to pull off of the highway off-ramp where the vehicle began jolting before stalling on a side road. We started the car back up and had just enough power to drive into the hospital parking lot next to the side road, where we had it towed to the Hyundai dealer across the highway. That Hyundai dealer identified the Intake Manifold Runner as the culprit via engine fault code P200A00. This Hyundai dealer was also concerned with oil consumption as the car's oil was low even though it had been maintained according to Hyundai standards. They did an oil consumption test, but argued that it was normal, while refusing to repair or replace the Intake Manifold Runner, & only cleaned the Intake Manifold Runner, for which they charged. They gave us the car back and it continued to consume oil to the point where the dipstick was reading below the low line. The car also continued to jolt and have low power. This same Hyundai dealer told us to add oil to the engine and have it towed to them, which we did. They then claimed the car had too much oil, blamed us for it, and continued to refuse to investigate the issue any further. They gave us the car back after a lot of confrontational back and forth on their part where they agreed to change the oil and do another oil consumption test at no charge. A few weeks later, the check engine light came back on, the car lost power, and we called the same dealer back. The dealer refused to help us, so we took it to another dealer who found the same P200A00 fault code and replaced the entire Intake Manifold Runner under warranty without any questions asked, and at no charge. When we were still dealing with the first Hyundai dealer, we opened a case on them through Hyundai corporate, but corporate did nothing and did not care about the issue. Hyundai Corporate and one of their dealers ignored 21-EM-008H.

- East Stroudsburg, PA, USA

The hybrid system failure. Chrck engine light is flashing. Abs system failure. Battery failure. Car can't go over 45mph, lost a job because of the issues. I'm afraid the car is going to blow up or catch fire. I'm afraid to drive it. The acceleration is barely there. It's like the car doesn't even wanna go. It sucks through gas like no other.

- Saint Louis , MO, USA