Engine tapping, knocking noise by the pistons Hyundai recall for software upgrade then two months later engine went into protection mode max speed only 57 mph so they change knock sensor then 5 days later back to Hyundai with same problem engine running in protection mode with the blinking engine light again this is the third time. Knock sensor worked find the first time because something happen with the knew one. The car was in motion on every case engine is no good.

- Cave Creek, AZ, USA

The contact owns a 2015 Hyundai Sonata. While driving, the vehicle lost power and made a knocking and ticking noise. The noise occurred from the engine during acceleration and the check engine warning indicator illuminated. The contact was able to drive the vehicle home. The following day, the vehicle was towed to napleton Hyundai of carmel (4200 E 96th St, indianapolis, in 46240, (844) 729-4217) where it was diagnosed that code: P1326 (knock sensor activation) failed and needed to be replaced. The technician replaced the knock and torque sensors. After the vehicle was repaired, the check engine indicator illuminated again. The vehicle was taken back to the same dealer and the engine was replaced; however, the check engine indicator continued to illuminate. The vehicle was taken back to the dealer where unknown parts were ordered and replaced on the vehicle. The manufacturer was made aware of the failure and provided case number: 16277030. The failure mileage was approximately 51,000.

- Indianapolis, IN, USA

On October 8, 2019, I was driving on hwy 285 in Georgia, when my Hyundai Sonata began to reduce its speed despite me pressing the gas. As I attempted to get to safety, a warning light flashed 'transmission hot..stop'. there was no warning other than that light that popped on at that moment. While driving through an intersection my car completely turned off. I made several attempts to restart with no luck. There was no prior warning and I maintain regularly oil changes. I had to have the vehicle towed to a local Hyundai dealership, where I was told that my motor/engine needed to be completely repaired. When I asked what the cause was, I was informed that my 3rd piston had exploded and damaged the motor to the point of needing replacement. The mechanic stated that it was not know why this occurred. I was also instructed that the manufacturer was no longer making the motor that I have in my car and I would not to purchase a used one. This would cost me approximately $5000 at the least. I have only had this car for less than two years and requiring a new motor is unbelievable. The mechanic shared that I was lucky that the car did not catch on fire while I was driving it.

- Douglasville, GA, USA

At 45,800 miles my Sonata could not reach 60 mph and the RPM could not reach 2000. I also noticed the gas mileage drops the Sonata had 35,000 miles on it. I took the car to the dealer and was told it needs new engine.

- Alhambra, CA, USA

While driving 30-40 mph the car turn off.. for no reason.. I have always done maintenance on the car from dealership. Just put in a new battery.. and car turn off.. this has happened 2 times

- Milpitas, CA, USA

I've been having an oil consumption issue on my vehicle. I've been getting my oil changed on time regularly & the oil seems to burn off extremely faster than it should. Every time I get my oil changed I've been told that there aren't any leaks. Now my check engine light is on & my engine is shaking. Ive only had my car for 3 years & my air bag light came on out of no where. Also my gear shift seems to lock up & wont release from park to drive

- Glenwood, IL, USA

We purchased our 2015 Sonata limited in June of 2018 with just shy of 59K miles. In August of 2019; and at 66K miles; our vehicle started producing a knocking noise; with a flashing "check engine" light; and would not accelerate. Since August of 2019, our Sonata has been in the dealership service department 3 times; and for a consecutive 30 days. We were told with the first time in the shop that the vehicle needed a new sensor; which was repaired within a day. When my husband returned to the dealership to take the car home; he barely made it a mile from the dealership before the car started repeating the same issues. The vehicle was immediately returned to the dealership for repairs. The second time we picked up the vehicle; we made in nearly 20 miles back toward home before the car died again. The third time into the dealership; and they finally determined that the engine had failed and required replacement. During this whole mess, we learned that we were experiencing the catastrophic engine failure that is associated with Hyundai's defective 2.4L theta II engines. We have brought this to the attention of Hyundai motor America. They originally offered to buy it back for $4K less than we owe on it; and continued to move us from one representative to the next. As of today, Hyundai has suddenly changed their mind and refuse to buy the car back. Hyundai has produced an unsafe & defective vehicle; prone to potential engine fires; engine failure; transmission issues; seatbelts that don't function properly; and power steering issues. Hyundai refuses to take full responsibility for their unsafe & defective product. We no longer feel safe driving the vehicle (which is still in the shop, btw); and no longer trust it to be reliable.

- Chandler, AZ, USA

Takata recall. My 2015 Hyundai Sonata lost power while I was driving. I took to mechanic and they say my motor locked up. My car only has 76000 miles

- Cartersville, GA, USA

I must start by saying that english is not my first language, Korean is and I would like a translator when I am called for reference. On 07/16/2019 I purchased a 2015 Hyundai Sonata from carvana and have run into the following problems: The battery was not the correct size for that model car, the engine air intake was completely missing, and the supercharger blew up 4 days after I bought the car. I have sent an email to carvana but never received a response. I have more documents pertaining to this matter that are too large to attached and will be able to send them via email.

- Gainesville, FL, USA

Driving my car on the hwy and totally lose all power and im driving 70 mph....lucky no one was behind me at the time but this isn't safe at all...this is my second Sonata that this has happened to and im really afraid to drive these cars... also the car started smoking under the hood.

- Lexington, KY, USA

I purchased my 2015 Hyundai Sonata recently with only 46K miles on it. After 3 weeks, the engine started clicking loudly and it literally sounded like a roller coaster being pulled uphill when under load. A week later the ticking was constant. My husband changed my oil and strained it, finding small metal fragments in the oil. These fragments are from an engine defect that Hyundai even admits having. Now as the second owner, I have no service records prior to ownership and my warranty claim was denied because of it. How can this be happening" Hyundai admits defect but are still allowed to rip off consumers with bad engines" the gdi Hyundai engines are defective and it cost me $3,000!

- Euharlee, GA, USA

Hi NHTSA, I drive a 2015 Hyundai Sonata and followed all the recommended maintenance. I started to notice my oil level was below low after 2000 miles at 47000 on the vehicle. I thought it was not filled correctly and had my mechanic check it. Also, I told my Hyundai dealership in laurel, md about the finding. I decided to top off my oil and closely monitor the status. On my next oil change, after 2000 miles my oil was low again. I add roughly 1.5 qts to top it off. I brought my car until Hyundai for an oil consumption test. The mechanic did not note how much oil he started as the baseline; however, the dip stick was over the full mark. After 3000 miles, my oil was at the low level. Per Hyundai owner manual, I can drive 7500 miles between oil changes with non - extreme driving. Hyundai stated my car was not consuming oil, and this is normal.

- Laurel, MD, USA

On or about 3/15/2015, purchased a new 2015 Hyundai Sonata. Maintained oil changes in accordance with "normal maintenance schedule" as described in owner's manual. In 5/2019, while driving on a highway, vehicle began sputtering, knocking and engine light came on. Was told engine "threw a rod" and punched a hole in the engine and now engine needs to be replaced.

- Kissimmee, FL, USA

The check engine light is illuminated and when coming to a stop, the vehicle lunges/surges forward as if the brakes are failing and I'm going to hit the vehicle in front of me. I took the the vehicle to 2 local jim click Hyundai dealers, the fault code is P200A and they stated the issue is most likely replacing the intake manifold which would not be covered by the powertrain warranty and my mileage is 85,000 presently. I would think that it would be a warranty item because the intake manifold is bolted to the engine and connected to the engine with wires. Now I'm stuck with a $1000 repair bill.

- Tucson, AZ, USA

The contact owns a 2015 Hyundai Sonata. While driving various speeds, the vehicle hesitated and made clicking noises in the engine compartment. In addition, the check engine indicator illuminated, remained lit, and flashed occasionally. The vehicle was towed to an independent mechanic who diagnosed that the engine needed to be replaced. The vehicle was towed to Hyundai inland empire (909-796-1600, located at 25072 redlands blvd, loma linda, ca 92354), but the failure could not be duplicated. The dealer stated that there was no failure with the vehicle. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was approximately 59,800. The VIN was invalid.

- San Bernardino, CA, USA

The contact owns a 2015 Hyundai Sonata. While the contact's daughter was driving at a very low speed, the engine completely failed. Prior to the failure, the engine seized on several occasions. After each failure, the vehicle would restart and resume normal operation. The contact stated that the check engine indicator illuminated prior to the engine failures. The vehicle was towed to napleton Hyundai of carmel (4200 E 96th St, indianapolis, in 46240, (844) 729-4217) where it was diagnosed that the engine failed. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 90,000. The VIN was unknown.

- Carmel, IN, USA

Had an accident 6/29/19 was hit driver's side front tire area. Insurance recommended closest repair shop fix (dick smith) and they returned it. Same week car was taken back to repair shop for concerns, clicking, vibrating, etc. Was told by dick smith repair shop needs a boot but car is "driveable". two days later car dies while driving.. ds (jeff, service mgr) says died 4 no oil causing engine to "seize up" but no light was on.. and prior to Hyundai running diagnostics also. Ds towed to Hyundai. Told by peacock Hyundai (chris) they had several reports of engine failure within 2 weeks of my car being towed and they were waiting on approval for new engine but then a different person (ted) says engine "seized" for no oil but car had oil change within last 6K miles and is full synthetic. Please help as I have a newborn and need a vehicle.

- Columbia, SC, USA

Stalling, car stops running while the car is in motion or about to take off. This has happened more than once. The car was checked by the dealer, dealer said they found nothing wrong.

- Rosedale, NY, USA

Purchased 9 months ago from a local dealer certified road ready carfax certified. Had 41000 miles. At 63000 miles entering highway 65 mph, car buck and loses power, engine shuts off, all idiot lights are lit and coast to side of highway in flowing traffic. Car starts up and does exactly same thing. Car started but not chancing again. Habit towed 40 miles to local mechanic. Obd code P0114. Mechanic suggest changing cvt valve. Finds metal shavings clogging valve. Cost $310. I leave garage and car does same thing 5 miles from garage. Now he suggested dealer to diagnose. Car starts but makes terrible noise. Tow to dealer. 2 days later I call them and he said complete engine failure and need new engine block. He will submit paperwork to Hyundai" for approval. This looks like known issue. Why is this allowed" safety issue, not sure I want car back, or trust it's fixed correctly.

- Seymour, CT, USA

The contact owned a 2015 Hyundai Sonata. While operating the vehicle, the engine suddenly stalled. After stopping the vehicle, flames were present under the engine compartment. The fire department arrived and extinguished the flames. Police report number: 19172167 was filed. The vehicle was destroyed and towed from the scene. The cause of the failure was not determined. The dealer and manufacturer were not contacted. The VIN was not available. The failure mileage was 70,000.

- Basking Ridge, NJ, USA