2017 Hyundai Sonata transmission & drivetrain problems

Related recalls

No recalls on file.

What owners say

1. Filed Jun 22, 2026CAElectrical SystemEngineTransmission & Drivetrain

   My 2017 Hyundai Sonata SE, equipped with the Theta II 2.4L GDI engine, is experiencing severe powertrain failures including rhythmic metallic engine knocking, catastrophic oil consumption, and un-commanded surges/jumping in speed while driving. These symptoms manifested following an unauthorized engine replacement performed by Hyundai of El Cajon under Repair Order [XXX], where the dealer covertly outsourced my vehicle to a third-party shop (Legacy Motor Works) to install an…

   NHTSA complaint #11745609 · source
2. Filed Jun 6, 2026PAEngineSuspensionTransmission & Drivetrain

   [XXX] [XXX] [XXX]; [XXX] [XXX] [XXX] Date: XXX To: National Highway Traffic Safety Administration Office of Defects Investigation (ODI) Subject: Formal Safety Defect Complaint – 2017 Hyundai Sonata Theta II Engine Failure, Excessive Oil Consumption, Intake/Engine Component Failure and Safety Hazard Dear Sir or Madam: I am submitting this formal complaint and request for immediate investigation into the dangerous and ongoing mechanical failures involving my 2017 Hyundai…

   NHTSA complaint #11742419 · source
3. Filed Jan 19, 2026VAEngineOther / UnknownTransmission & Drivetrain

   My vehicle has a documented excessive oil‑consumption defect. After a 1,000‑mile oil‑consumption test performed by a Hyundai dealership, the engine was found to have consumed 2.8 quarts of oil, which is far above normal and poses a safety risk. The dealer referenced TSB 23‑EM‑008H and recommended a chamber cleaning but could not guarantee it would resolve the issue. Hyundai Motor America declined to cover the repair and refused to escalate my case. This level of oil…

   NHTSA complaint #11711950 · source
4. Filed Jan 3, 2026PACrashTowedAirbagsDriver Assistance & Safety TechTransmission & Drivetrain

   Airbags did not deploy no indicator light came on before nor after I was struck from my driver side front area and yes it is available for inspection upon request. My safety along with my sisters safety was put at risk due to the negligence and cheapness of the dealership I purchased the car from also from there misleading information and improper inspection before selling me the car Car has not been reproduced or confirmed The car was inspected by a third party appraisal…

   NHTSA complaint #11708579 · source
5. Filed Nov 29, 2025TXElectrical SystemEngineTransmission & Drivetrain

   e vehicle is burning approximately 2 quarts of oil every month with no external leaks. This indicates severe internal oil consumption, which is a known defect in Hyundai’s Theta II 2.4 GDI engines. I discovered oil inside the VVT solenoid electrical connector and on other wiring, which shows oil is traveling through the engine harness. This causes hesitation, rough running, and the risk of sudden engine power loss. The vehicle feels unsafe to drive because the oil level…

   NHTSA complaint #11702016 · source
6. Filed Sep 11, 2025NVEngineOther / UnknownTransmission & Drivetrain

   What component or system failed or malfunctioned, and is it available for inspection upon request? The engine in my 2017 Hyundai Sonata Sport is defective. Oil pressure failed testing, oil contamination was found on the oil pressure sensor and connector, and the vehicle has experienced excessive oil issues. The engine is still in my possession and available for inspection upon request. How was your safety or the safety of others put at risk? The vehicle has gone into limp…

   NHTSA complaint #11686681 · source
7. Filed Aug 23, 2025INTransmission & Drivetrain

   While driving about 45 miles per hour the gas engine shut off and the electric engine lost power, were able to coast a few miles under low power under electric engine and then engine shutdown completely and would not start, had car tolled to nearest mechanic, he confirmed eninge damaged by rod bearing failure, he tried to get a new engine to replace the damaged one and hyundai told him they could not sell him and engine

   NHTSA complaint #11682619 · source
8. Filed Aug 5, 2025MIEngineAcceleration & Cruise ControlTransmission & Drivetrain

   I am leasing a 2017 Hyundai Sonata from Car City in Michigan. In May 2025, the vehicle received a brand-new engine replacement due to previous problems. I picked the car up on [XXX], and on the same day, the vehicle began malfunctioning. It would not accelerate properly, jerked and stalled, and multiple warning lights — including the check engine light — came on immediately. This made the car unsafe to drive. I contacted the dealer, but they told me to wait until Monday to…

   NHTSA complaint #11678429 · source
9. Filed Aug 4, 2025TXEngineTransmission & Drivetrain

   The engine in my 2017 Hyundai Sonata has been burning excessive amounts of engine oil over an extended period. The issue started approximately 10,000 miles ago but has worsened recently, requiring frequent oil top-offs between regular oil changes. The oil consumption is abnormal and not consistent with normal wear. This excessive oil burning poses a potential safety risk, including possible engine failure, stalling, or fire hazard due to low oil levels if not monitored…

   NHTSA complaint #11678234 · source
10. Filed Jul 14, 2025NCEngineOther / UnknownTransmission & Drivetrain

    All documents are attached as it is many separate incidents that ended knock from motor and minutes later, a piston shooting through the engine block which is what made the car inoperable

    NHTSA complaint #11673236 · source
11. Filed Apr 2, 2025UTElectrical SystemEngineTransmission & Drivetrain

    The check engine light light is on now giving code p200a I was driving and the center console shut off and the engine died I had to pull over and start the car again it started but the check engine light light is on now for a p200a I’ve looked it up and everything I can find says there is a recall but my car isn’t in it so what can I do I don’t want to cause a fire or an accident because my car messed up o. Me

    NHTSA complaint #11652308 · source
12. Filed Oct 26, 2024OHEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

    I have had many problems with my car since 1st day of purchase timing belt oilpans valve cover gasket burning excessive oil caliper brake hose last few events I have experienced my ABS light coming on in the car stop moving while am in traffic very dangerous I work for the hospice reserve one day while driving the car started shaking compulsive and the check engine light came on I was informed oil was leaking onto my spark plug and engine was going out I experienced extreme…

    NHTSA complaint #11622064 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology