2011 Hyundai Sonata: excessive oil consumption

Filed Jan 26, 2026 · Engine · NY

My Hyundai Sonata has encounter two failing cylinders (compression loss) due to scoring. When driving in the highway I got engine shudder and loss of power (speed) that could have put me in dangerous driving condition, accident or other. These GDI engines are notorious for poor oil circulation due to faulty designed piston rings. Hyundai has long history with these poorly manufactured engines and class action lawsuits. I notified Hyundai but they are not willing to remedy the situation. I have worked with local dealership Miller Hyundai, as well as corporate. All I get are excuses and that I’m not covered. These engines are completely problematic with oil consumption and oil blow by, causing seizing, rod bearing failure, carbon buildup, cylinder damage, etc. The info on the internet over customers and these GDI engines is overwhelming. Oil related Fires are another issue as well. Hyundai needs more accountability than the class action for rod baring failures. Because of the damage to my pistons, I could have gotten in accident with loss of power on highway…full due to poor piston rings, damage from improper oil flow and near complete engine failure.

Filed Jan 9, 2026 · Engine · MO

I am reporting a safety-related engine failure involving my 2011 Hyundai Sonata 2.0T. In November 2025, at approximately 90,000 miles, the vehicle experienced a sudden engine failure while driving, including loss of power and abnormal engine noise. This created an unsafe driving condition and required the vehicle to be removed from service. Component/System Involved: The engine (Theta II 2.0T) suffered a catastrophic internal failure. The engine and internal components remain available for inspection upon request. Safety Risk: The sudden loss of engine power reduced my ability to maintain speed and maneuver in traffic, posing a safety risk to myself and other motorists. Confirmation and Inspection: The failure was confirmed by an authorized Hyundai dealership, which inspected the vehicle and documented the internal valve train condition through photographs. Hyundai Motor America reviewed the claim and issued a written denial. No independent third-party technical inspection was performed. Prior Symptoms: Before the failure, the vehicle had a history of excessive oil consumption requiring frequent monitoring and oil addition despite regular maintenance. Abnormal engine noise was present for approximately one minute before failure. No warning lights adequately predicted the sudden failure. Additional Context: This vehicle is equipped with a Theta II engine, which has been the subject of prior recalls and settlements related to internal engine defects. Hyundai denied warranty coverage alleging “exceptional maintenance neglect”; however, inspection photos show a well maintained valve train with no sludge or oil flow obstruction, only light surface varnish consistent with normal engine aging. I am concerned this failure represents a continuation of a known Theta II engine defect (confirmed by Hyundai technician who performed inspection with OBD code P1326 followed by engine failure) and poses a serious safety risk due to sudden loss of engine power while driving.

Filed Oct 2, 2025 · Engine, Fuel system · MD

The affected component is the engine/rod bearing (Theta II 2.4L). My 2011 Hyundai Sonata stalled and the engine locked up twice in live traffic (March 2025 and July 2025). The vehicle is available for inspection if needed. This created a serious safety risk to me and others on the road, as the stall occurred on [XXX] at highway speeds. This failure could have been catastrophic had it happened on the DC/Baltimore Beltway or another high-traffic roadway. Hyundai’s system shows Recall 132 was marked complete at very low mileage (around 32,000 miles), but my vehicle later developed oil consumption and stalling consistent with rod bearing failure. Capitol Heights Hyundai noted a warranty pre-authorization (PA) in March 2025 and told me Hyundai needed my mailing address “for the claim,” but later said it was a typo and that no record exists. The dealership charged me for a diagnostic but did not inspect the vehicle for rod bearing failure, despite symptoms consistent with Recall 132. Annapolis Hyundai, where the car was purchased as a CPO, has admitted they have no documentation that Recall 132 was ever performed (no repair order, mileage, or technician notes). Yet Hyundai’s system shows Recall 132 marked “complete.” Without proof that the KSDS software or bearing inspection was done, I belive this recall should be considered open. Hyundai Consumer Affairs has stated that I must pay for towing and diagnosis before they will investigate, with possible reimbursement later. This conflicts with federal law (49 U.S.C. § 30120), which requires recall diagnosis and repair at no cost to the consumer. Prior to the failures, my vehicle had a history of oil consumption and “no oil on dipstick” findings, which are known precursors to rod bearing failure. No warning lamps appeared before the stalls. I am requesting the federal safety agency’s assistance in requiring Hyundai to provide documentation or reopen Recall 132 and perform a no-cost inspection/repair to ensure this vehicle is safe to operate INFORMATION REDACTED PURSUANT TO THE FREEDOM OF

Filed Sep 24, 2025 · Engine · TX

I own a 2011 Hyundai Sonata with a 2.0 turbocharged engine. The engine failed/presents issues such as loss of power, rattling, oil consumption, and smoking, which resulted in my engine seizing up. This creates a serious safety risk while driving, to now my car no longer operates. I checked the federal safety agency’s recall database and found no open recalls for my VIN regarding engine replacement, but I believe this engine defect should be investigated for a recall.

Filed May 2, 2025 · Engine · FL

My girlfriend was driving my car at 70mph on [XXX] when suddenly the engine stalled abruptly with no warning. She had to coast over to the shoulder and come to a stop. At this point the engine would NOT turn over. If it did it was very challenged to turn over as if the engine was seized-partially or fully. My car was towed to my mechanic who later confirmed that the battery and starter were indeed good and that the engine seemed partially seized and even possessed metal shavings. On top of this my car has been consuming half a quart of oil every 400 miles as I check the oil everytime I get gas. So with this information my car seems to be fit for the Hyundai class action settlement recall #132 for the 2011 Sonata GDI engine. So I towed my car to Coastal Hyundai of Melbourne, FL, a dealership where all my records and maintenance have been done and are up to date. My car has been at this dealership for TWO weeks and they won’t even confirm that they have looked at it. I am under the understanding that it is costing Hyundai a lot of money to replace this engines and that they purposely stall hoping to somehow save money. I commute 72 miles round trip to work and have been greatly inconvenienced as I am having to borrow cars from family and figure out how to get to work. Any help in this regard is greatly appreciated. Thank you in advance! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 23, 2025 · Engine · MS

UNKNOWN, Makes a disturbing sound upon starting the vehicle like something inside the engine rattling, access oil consumption and burning smell , replaced valve cover gasket, still smelling oil burning

Filed Oct 30, 2024 · Engine · NC

Engine consumes oil profusely. 175000miles. Complaint #: [XXX], 8/23/24. Car is not drivable parked. Common complaint. Should have been RECALLED. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 25, 2024 · Engine · 83,000 miles · IL

The contact owns a 2011 Hyundai Sonata. The contact stated that the vehicle was experiencing excessive oil consumption. Additionally, the contact stated while driving at various speeds, there was an abnormal sound coming from the engine. The contact stated while driving 40 MPH, the vehicle stalled inadvertently. There was no warning light illuminated. The contact was able to pull onto the median. The vehicle failed to restart and was towed to the residence. The vehicle was then towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The dealer informed the contact that the repair was not covered under warranty because the oil change service records were not available. The vehicle was not repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 83,000.

Filed Mar 31, 2024 · Engine · NC

Hyundai Theta II engine has known defects with excessive engine oil consumption. Numerous consumers have complained of this issue as it appears widespread to the entire line of Theta II engines. A recent class action has limited the scope of the recall but an easy search can see it impacts (or has the potential to impact) nearly all Theta II (six gen) engines from Hyundai. The issue is that the scope of the recall needs to be widened to cover others who are impacted who currently have no recourse. Many are facing the same situation, which can easily be found with a brief search online. [XXX] At this time the issue is the car stalling at unknown times, fire from oil being displaced in other areas and various other issues due to improper and unusual oil consumption. The best situation would be to force Hyundai to review and expand the scope of their recall immediately. I found that I had excessive oil consumption which was causing my car to grind and shift heavily sometimes jerking on the highway. While I didn't crash, that possibility did exist when my car continually grinded heavy between shifting. I took my car to the dealer where they confirmed this issue. However, Hyundai declined to remediate. There are no warning lights and this could easily result in a crash, or fire. Hyundai has records of my maintenance, as my car is only serviced by the dealership where the car was purchased and I am the original owner. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 12, 2024 · Electrical, Engine · DC

Engine leaks/burns oil too frequently. Every other week I’m continuously having to put oil to refill levels. Also electrical system for turn signals is always going in and out. Sometimes it works and sometimes it doesn’t. Safety hazard because other vehicles can’t tell that I’m turning.

Filed Jan 27, 2024 · Engine · WA

Oil consumption excessive. I've been doing my monthly and annual maintenance engine ticks. I've added oil every 2 weeks every 200 miles.

Filed Jan 17, 2024 · Engine · NC

Engine uses oil excessively, stopped suddenly on highway, Hyundai America refused to authorize oil consumption test car is now in limp mode