2015 Hyundai Sonata Engine Problems

since i have owned this car they have replaced the knock sensor twice. there is a recall on the engine for crank bearing wear, my car now is burning through 5 quarts of oil every 2 weeks with no oil leak spots on the ground. i would like them to replace the engine as per the recall. the knock sensor should be an indication of the bearings going bad. i have been getting the run around from the dealer in Salem, Oregon. so, i would like some assistance with this problem thank you for your time.

CAR STOPPED ON THE ROAD LAST WEEK 4/6/26 COULD NOT START HAD TO GET TOWED MECHANIC SAYS NO OIL IN ENGINE RECEIVED OIL CHANGE LAST MONTH

My engine is a class action lawsuit and Hyundai refuses to honor their extended warranty because my title has a brand on it. (Odometer issues) My car has been a the dealer for a month and Hyundai refuses even though it's a safety issue and a defect in their design. I want a new engine. The car is perfect otherwise.

Rod bearing failure

The contact’s daughter owns a 2015 Hyundai Sonata. While driving and coming to a stop, the vehicle lost motive power. There was no warning light illuminated. 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 dealer informed the owner that the failure would not be covered under warranty due to a lack of engine maintenance on the vehicle. The owner provided the maintenance records. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 124,000.

Check Engine light is flashing on dashboard. Reduced Vehicle speed. Car will not drive beyond 62 miles.Lost of power during acceleration.

I JUST GOT THIS CAR ABOUT 2 MONTHS AGO AND NOW I AM BEING TOLD I NEED A NEW ENGINE. I JUST LOOKED UP 2015 HYUNDAI SONATAS AND SEE THAT THIS MODEL DOES HAVE REPEAT ISSUES OF ENGINE FAILURE SO I DO NOT UNDERSTAND WHY THIS VIN NUMBER IS NOT UNDER THE RECALL LIST SINCE I AM HAVING THE SAME ISSUE

FEDERAL REPORT ON TECHNICAL OBSTRUCTION AND WARRANTY FRAUD (THETA II SETTLEMENT) TO: National Highway Traffic Safety Administration (NHTSA) FROM: [XXX] VIN: [XXX] REPAIR ORDER (RO#): XXX VEHICLE LOCATION: Hyundai Shop - [XXX] HYUNDAI CORPORATE CASE: #XXX STATE COMPLAINT (AZ AG): XXX I. CHRONOLOGY OF EVENTS AND EVASIVE TACTICS All documentary evidence has been formally submitted to Hyundai Motor America’s National Consumer Affairs Department, addressed to Case Manager Bryan, at [XXX] and via the official email: [XXX] . STEP 1: Falsification of Title Status (Code A99) Hyundai initiated its denial by alleging that the vehicle held a "Salvage" title status, citing internal code A99. EVIDENCE: I possess a Certified and Stamped Motor Vehicle Record (MVR) from the Arizona MVD, as well as my Clean Title. Mr. Bryan categorically asserted that code A99 "cannot be removed," thereby deliberately disregarding an Official State Certification. STEP 2: Allegation of Negligence (Karen) Corporate representative Karen claimed via telephone that the vehicle's failure was attributable to "negligent maintenance." EVIDENCE: The Official WebDCS report—printed by Mr. Ismael Barragán (Service Drive Manager)—completely refutes this claim; the Blue Link service history indicates "0 FINDINGS." STEP 3: Fabricated Diagnosis and Breakdown of Improper Charges After being compelled by Mr. Bryan to take the vehicle to the dealership for a diagnosis, the narrative shifted to an "Oil Pump Failure." Mr. Ismael Barragán (Service Drive Manager) presented a billing estimate to the customer under Repair Order (RO) #XXX, itemized as follows: Mechanical Diagnosis: 193.00 USD Engine Replacement/Rebuild: 11,980.58 USD TOTAL DEMANDED FROM CONSUMER: 12,173.58 USD TECHNICAL EMPHASIS: The Blue Link report (showing 0 Findings) serves as irrefutable INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Engine has knocking sound. Sudden loss of power and hesitation when accelerating

Engine completely seized while driving.

My 2015 Hyundai Sonata experienced Service Campaign TX3, TSB# 15-01-022, with an error code of P0010. My car was in the repair shop from Thursday, February 19th, until Thursday, February 26th, being repaired. This cost me roughly $2,300.00 out of pocket. When I attempted to file for reimbursement through Hyundai, I was told they were not reimbursing me. My car experienced failure the first of February. When my mechanic investigated what had happened, it was in fact, due to the service campaign.

The car is burning a quart of oil a week.

​I will take ​10k$ for the car or a new engine and steering, damages fixed. . I also need a rental by April 10th and $300 for inconvenience thus far. ​The engine ​stalled ​twice​ when driving over 2 months! The lawyer won't be forgiving.

While driving my 2015 Hyundai Sonata, the vehicle suddenly lost power and entered limp mode. A loud engine knocking noise was present, and acceleration was severely limited, creating a safety risk in traffic. The check engine light illuminated at the time of the failure. An independent mechanic confirmed diagnostic trouble code P1326, related to the engine knock sensor detection system designed to detect early engine bearing failure. The condition occurred without warning. The vehicle is currently not being driven to prevent further damage and is available for inspection upon request. Sudden loss of power while driving poses a serious safety hazard. This appears to be a known engine defect affecting similar vehicles.

I have been dealing with issues with the turbo that cost over $3k out of pocket to get "fixed" only to have a part go bad and needed to be replaced. Now the engine is bad and needs to be replaced. The dealership is horrible at being honest and treat me as if that's not my only vehicle. I ask for a loaner car and thery never respond!!

On January 21, 2026, while driving on I-495 at highway speeds (e.g. 50-60 mph) in heavy traffic, my car made a "clunk" sound and I suddently was unable to accelerate. There were no warning lamps, messages, or other symptoms prior to the failure, but immediately when it happened several warning indicators, including the check engine light, oil light, and tire pressure indicator, lit up. The electrical systems and brakes appeared to still work, but the best I could to was coast onto the nearest shoulder and call for an emergency tow. I waited on the shoulder of a busy highway, in the dark, for over an hour. My car apparently has a type of engine that is known for catastrophic failure, so I assume that is what happened. I had the car towed to a Hyundai dealership and they confirmed that the engine needs to be fully replaced.

While driving on the freeway, my vehicle experienced a sudden and catastrophic engine failure. The check engine light began flashing, the vehicle lost power, and I almost lost control of the car. I barely had time to pull over to the shoulder to avoid an accident. The vehicle was towed to a Hyundai dealership. The engine does not start and the engine block is cracked. Hyundai denied coverage stating that a software update (Campaign 953) was not installed. Campaign 953 is only a detection update and does not repair or prevent internal engine failure. This is a serious safety issue.

The vehicle suddenly lost power while driving on a public roadway. Immediately after, the vehicle began producing a large amount of smoke. The smoke quickly filled the cabin, making it difficult to breathe and creating an urgent safety hazard. My passenger and I had to exit the vehicle right away due to the amount of smoke. We were exposed to smoke inhalation and were stranded on the side of the road in unsafe weather conditions for over an hour while waiting for a tow truck. I later learned that the vehicle had an open recall related to engine issues; however, I was never notified of this recall. Regardless of recall status, the sudden loss of power combined with heavy smoke and potential fire risk created a dangerous situation that could have resulted in serious injury or death. I believe this issue represents a serious safety defect and fire hazard that could endanger other drivers.

My 2015 Hyundai Sonata has a defective engine. The motor failed unexpectedly even though the car has low usage and has always been maintained properly. I was informed that many Hyundai engines from these years came with manufacturing issues, and mine appears to be one of them. I am requesting that Hyundai replace the engine or provide a proper solution since this defect is not due to misuse but a faulty motor that came from the manufacturer. I need this resolved as soon as possible because the car is not running at all.

The vehicle experienced sudden engine failure due to rod bearing damage. The engine seized without warning and required towing. A Hyundai dealership confirmed rod bearing failure consistent with known Theta engine defects. Hyundai denied engine replacement coverage because a software update (Campaign 953 / KSDS) was not completed; however, I never received notice of this campaign. The campaign does not appear on the NHTSA VIN lookup for my vehicle, and it was still listed as outstanding in Hyundai’s system at the time of failure. The sudden engine failure created a safety risk due to loss of power.