I have financed my Hyundai Sonata Sport 2017 in December of 2019. I have not had any issues until this current year of 2023. I have noticed that with every oil change that I receive that I would have to go back to the dealership or certified mechanic a month or two earlier. I personal checked for leaks but seen no signs of why I had to get constant oil changes. Recently, when driving on the highway speed limit at 70 mph and my car went to 60 mph. The engine light came on but no other warning. I stopped the car, check the oil level which was pretty low and topped it off. I let the car sit for a short while as I was only 5 mins away from home. Soon as I made it back, I check the oil level again which was in the line. Check for visible leaks. I figured my car shook as it did and idle at the speed do to a misfire with the spark plugs/coils which I had already replaced 2 months prior to the incident. I was able to use a car scanner from AutoZone to check for codes but there wasn't an engine light at all on the dashboard. There was only one code that did show which was P1326 but no engine light or flashing engine light. I then schedule an appointment for an oil change and to confirm that the engine light code was with Firestone Auto Care to analyze the issue. They did an overall check over on the car, checked for codes, and changed the oil in which they found no issues. With driving my car to test if there were any issues it completely shut down and did not want to start. They called me to tell me that the engine was locked. They tried turning the engine over multiple times, but nothing would start up. Due to not knowing what was going on with my vehicle I felt unsafe with driving it as it completely slowed down on the highway. As other cars where speeding by. It gave no indications prior to the incident that anything was wrong. I am waiting to see a Hyundai dealership to inspect my vehicle which they are booked until next month. My car is currently disabled.

- Norfolk, VA, USA

Car burns 1 qt of oil every other day afraid going to cut off and blow up while driving

- Vale, NC, USA

Extremely high oil consumption. Defective, faulty engine. Smoke from tail pipe on acceleration.

- Eagle Mountain, UT, USA

Engine Recall from Hyundai, I brought it to Hyundai Route 1, South Brunswick, NJ, they claimed Hyundai needed to have it done, the recall mail I received was from Hyundai itself, their engines are catching fire, their engine oil levels are going dangerously low in a really short time, please help me get to a resolution to this issue or give Hyundai a citation for their irresponsible actions.

- Sayreville, NJ, USA

The contact owns a 2017 Hyundai Sonata. The contact stated while driving 70 MPH, the vehicle decelerated with the check engine warning light blinking before the vehicle lost motive power. The contact was able pull over on the side of the road and the vehicle was towed to an independent mechanic. The vehicle was diagnosed by the independent mechanic and the contact was informed that the vehicle had experienced engine damage as listed in NHTSA Campaign Number: 21V727000 (Engine) and the contact was referred to the manufacturer for assistance. The manufacturer was contacted and informed the contact that the vehicle was not included in NHTSA Campaign Number: 21V727000 (Engine). The failure mileage was 107,000.

- Northridge, CA, USA

I purchased the vehicle in December and the same weak it began leaking oil the window won-??t roll down and the car shuts down by itself. It caused me to have an accident and the dealership has repaired it 14 times with the same issue. They are forcing me to drive an unsafe vehicle I need to report this vehicle as unsafe

- Chicago , IL, USA

At roughly 133,800 miles, the oil warning light began to appear, but sporadically. I took the car to my local Valvoline who relayed that the dip stick was basically dry. My last oil change was at 131,439 miles. Valvoline added 4 quarts of oil at 133,893 miles. That was on 01/03/2023. I have had one oil change since then. My current mileage is roughly 137,000 - I have had to add 5 quarts of oil and the dip stick still reads low. There are no signs of an oil leak, no excessive exhaust (blue or otherwise), or any visible leaks under the hood.

- Lexington, KY, USA

Very high oil consumption, increasing as more miles added.

- Bedias, TX, USA

The motor in the car is shot it's a 2017 sonata with 153000 miles on it I thought there was a recall on the engines

- Bourbonnais, IL, USA

Excessive oil consumption. 1 quart every 700-800 miles

- Vero Beach, FL, USA

- Car is consuming high amounts of engine oil. - The oil pressure warning light comes on within 1500 miles of oil change. - This may lead to engine failure and stall.

- Villa Park, IL, USA

The contact owns a 2017 Hyundai Sonata. The contact stated while driving approximately 50 MPH, the vehicle lost motive power and failed to accelerate above 35 MPH. The check engine warning light was illuminated. The vehicle was driven to the residence with the hazard lights activated. The vehicle was towed to a dealer where it was diagnosed that an unknown part needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 76,000.

- Adah, PA, USA

Excessive oil consumption

- Las Vegas , NV, USA

Car is burning an excessive amount of oil. After getting the oil changed I needed to add additional oil. Car is driving sluggish and won't pick up speed. In 2023 the car bucked, check engine light came on and the car failed to drive over 60mph. I took to Firestone to be repaired and they fixed the knock sensor. After a few weeks, the car bucked, check engine light came on and car would not drive over 60, they also informed me the car used too much oil since I drove it last, there was a service bulletin for the oil consumption and to take to Hyundai. Took to dealer for repair, they said engine consumption is fine. After a few days cars started becoming sluggish not picking up speed. I checked the oil - it was empty.

- Flower Mound, TX, USA

The engine is burning about 3 quarts of oil every 500 miles of driving. It is causing carbon to gunk up the spark plugs every month and a misfire will happen at random. I tried contacting the dealer and even though they have several complaints, they said they won-??t do anything. I have brought it to several mechanics and they say the manufactured engine needs to be replaced.

- Bay St Louis, MS, USA

Occurrence: This has been a recurring issue for over a year (over a year, might be closer to two years now) for our PHEV Sonata. It has happened approximately 10 times. Problem: Total engine shutdown when driving the car. "Shut down engine" type error message pops up and cannot accelerate. Steering still works, but it can be hard to pull over due to lack of engine power. The car can be restarted after shutting down, but must first come to a complete stop and into Park. Safety Issue: The car stops working. Obviously, this would be quite dangerous on a busy road, a highway, or if you were taking a left turn, etc. Confirmation: The dealer indicates that the hybrid battery is a problem and should be replaced. However, due to supply chain issues, we have been waiting for over a year for the replacement. **** Reproduction Steps: **** We have found that it is most likely to happen with a fully charged battery and a sudden braking action. I suspect the issue happens when trying to charge the battery but due to its condition, it shuts down instead. It tends to happen: 1) Full Charge: Battery is fully charged overnight or "topped up" to full charge 2) Sudden Braking: Having to brake hard, such as being cut off. We have found that adjusting charging and driving habits has reduced but not eliminated the issue. Suggestion: I would suspect that having some electrical component to prevent a sudden overcharge might eliminate this problem (shunting excess current or turning off regenerative braking for sudden stops). Warning Messages: A warning message is seen, but it happens at the same time the engine is shut down and disappears before you could take a picture of it (as you are busy trying to do an emergency pull over).

- Torrance, CA, USA

2017 Hyundai hybrid Sonata Check hybrid system turn off engine, It-??s been at a dealership for three months last time. after year later same issue again.

- Diamon Bar, CA, USA

Engine consumes way to much oil got oil changed and a week later it was almost empty when i checked. This has been an ongoing issue for many years already.

- Cullman , AL, USA

Engine is consuming lots of oil. There are recalls on Sonatas but mine is not included, although I have a 2017 Hyundai Sonata Sport with a 2.4L Theta Engine produced in Alabama which are engines that are having defects with oil consumption. 2-3 months I was trying to get car into a dealership for inspection of engine because I kept having to add oil. They would not provide a loaner & I could not afford a rental at time or go without a car. In October 2022, I had to I take car to Hyundai in Trenton, NJ because engine light came on & car was jumping. Spark plug in cylinder 4 blew from low oil. On report from dealership that's exactly what is written on it. They replaced spark plug & got approval to start oil consumption testing. Had to drive 1,000 miles. Returned car & was missing 3 quarts of oil. Had to drive another 1,000 miles, 3 quarts of oil missing again. They performed top engine cleaning saying that could help eliminate the problem. I drove 1,000 miles after cleaning & was still missing 3 quarts of oil. In January 2023, dealership told me they'd put request through for a new engine. I called 1 month later giving plenty of time to have a response. They didn't put request through. Said I need to do more testing & had to leave my car there for a few days with no loaner provided. Why didn't they tell me this 1 month prior & why has no one called me to inform me of this. I can not afford a rental, miss work & my child miss school. We missed a ton since dealing with this issue & I've put out over $1,000 on rentals, oil, damages, deductibles, etc since this started. I contacted a Hyundai case manager & they are still going back & forth with dealership 2 months later. My car is obviously burning a lot of oil & after 3 tests & 6 months I should not have to go through this. In the last 1 1/2 months, I've had to replace spark plug in cylinder 1 twice & cylinder 4 once & constantly have to add oil. My cars shows ALL symptoms of the current issue with engines.

- Philadelphia , PA, USA

Hyundai has an active recall and open service bulletins for an ongoing issue with Knock Sensors in 2017 Sonatas (my vehicle is a 2017 Hyundai Sonata Sport). Over the last 18 months... the vehicle has been in for service 6 times... 4 in the last 6 weeks... due to ongoing issues with the knock sensor causing the vehicle to go into "limp mode" and causing the vehicle to decrease speed to a max of 60mph. There is no pre-warning for when the sensor will trip and cause the issues... which means if a vehicle is on a highway traveling at a speed of 70mph or more, and the sensor trips... the vehicle will decrease speed down to 60mph maximum. The protocol I am aware of for the repairs... was a first step software update... 2nd step replacement of the sensor... 3rd step replacement of the engine. In 6 attempts to remedy the issue... Hyundai has refused to authorize the appropriate steps to complete the repairs and replace the engine, causing my vehicle to become a hazard on the highways without warning to myself as the driver, or other vehicles on the roadway. **Note, the most recent occurrence of this was 4/22/23.**

- Kaukauna, WI, USA