2011 Hyundai Sonata fuel system problems

FUEL/PROPULSION SYSTEM

I purchased fgis car from a used car dealership, for over $6,000.00 , which is not a ton of money, but plenty enough to not have instant issues. Since my purchase in june 30, 2026, i have already had all of these issues occur. There is white smoke coming from the left tail pipe, it is sluggish when you push on the gas, there is black soot constantly on my rims that is extreamly hard to remove, the high pressure fuel pump jas failed, I can tell because the oil is higher then it was when o had the oil freshly changed, and it smells of gasoline.inside the oil. The exhaust has stron smell of gasoline. My steering wheel has a loud clinking noise everytime I go over a speed bump on pull into my driveway. Just so many items consistently needing repair or replacement, even though I just had the fuel system cleaned, the oil changed, and filters, and.oil filter too. I checked to see if any of my issues are covered by a recall warranty, because they all are recalled items for my car year, make, and model, but apparently Hyunfai is only covering these dangerous recall items for ul to 10 years. These items shkuld be covered longer, because my carfax states that at least one of these recalled items had already been changed in 2018, and is already broken again!! Hyundai should have covered these extreamly high wear out car parts for a longer period of time, or for the life of the vehicle, if every 5 years your replacing a $1000.00 part, not including labor, like the (HPFP) I was quoted by auto zone for over that price point!! "Ridiculous"! Another item is the air bag cover on the driver side windows area, of the body frame it is loose and keeps un-clipping, i am afraid that it is going to possibly just go off and kill me or something!! Very disappointed right now, that i cannot get any of these recalled items replaced by the manufacturer!!

NHTSA complaint #11751926 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE

The contact owns a 2011 Hyundai Sonata. The contact stated that the vehicle stalled while driving at various speeds on four occasions. During the first occasion, the vehicle was towed to the residence. The vehicle was then towed to an independent mechanic, where it was diagnosed, and it was determined that the low-pressure fuel pump needed to be replaced. The vehicle was repaired, but approximately a year later, the failure recurred. The vehicle was then towed to an independent mechanic, where it was diagnosed that the high-pressure fuel pump needed to be replaced. The vehicle was not repaired, and the contact was advised to contact a dealer for assistance. The vehicle was then towed to a dealer, where it was diagnosed and it was determined that the high-pressure fuel pump and electrical wiring harness needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 167,000.

NHTSA complaint #11729883 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

The contact owns a 2011 Hyundai Sonata. The contact stated that while attempting to start the vehicle, the vehicle failed to start as intended, and the contact noticed a strong fuel odor coming from underneath the hood. Upon inspecting underneath the hood, the contact noticed a leak. An independent mechanic diagnosed the vehicle and determined that the fuel line was leaking. The vehicle was not repaired. The contact related the failure to an unknown recall. The manufacturer was contacted, but only the automated system was available. The failure mileage was unknown.

NHTSA complaint #11709592 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

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 NHTSA’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

NHTSA complaint #11690938 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

1. The car began to randomly stall and stop running. This happened while driving and it was extremely dangerous. Typically, the engine would restart after at least waiting 15 minutes. Any attempt to start the car before that time would fail. 2. When the stalls happened, the car acted as if it had run out of gas. The engine would simply stop running WITHOUT WARNING, at intersections, on city streets, and on the freeway at high speed. It did not matter how full the gas tank was. 3. My brother and I diagnosed the problem as intermittent loss of fuel pressure. 4. My brother and I replaced the FACTORY fuel pump, and to hour horror, when we unplugged the electrical connection/plug, one of the pins from the fuel pump came out with the plug/connector. 5. We inspected the fuel pump and discovered that parts of the electrical plug INSIDE THE FUEL TANK had become burned and melted. See Image SANY0135.JPG === This is a SAFETY DEFECT - either the internal fuel pump electrical connections were faulty from the factory or the problem developed over time. There have been other recalls for this model of car for random engine stalls but this is a NEW and DIFFERENT cause. A dealer with a relatively inexpensive Infrared camera could likely spot this problem with minimal vehicle disassembly. There was clearly a LOT of heat concentrated in the area of the electrical connection to the fuel pump. We hope this report triggers a recall and prevents extremely dangerous random loss of engine power events, fires, or worse. Please recall all the vehicles that used that fuel pump for inspection before there is a disaster.

NHTSA complaint #11687974 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I had bought this car off Facebook marketplace after confirming with my dad that it was a good car, when I had finally saved enough. After I took it home the check engine light had come on not too long after, the engine stalls when turning the key, pressing on the brake helps start the engine. Turns out the car was a salvage title and my dad didn’t know that and I didn’t know what that was.

NHTSA complaint #11655390 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I tried pumping gas and the car would not let me pump the gas into the car. I had to hold the the gas pump hose and pull the trigger myself to pump the gas, which would still make the clicking stop noise that stops the pumping of the gas. Then when I started driving, the check engine light came on. Went O'Reilly to test the check engine light code and it popped up with a P0449 code for the evaporative emissions (EVAP) vent control valve.

NHTSA complaint #11629373 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

My car will randomly shut off while I’m driving. My seatbelt comes undone My door has opened while I was driving down the highway.

NHTSA complaint #11625258 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE

The contact owns a 2011 Hyundai Sonata. The contact was informed of NHTSA Campaign Number: 15V568000 (Engine), and the vehicle was taken to the dealer for the recall repair; however, the dealer informed the contact that the knock sensor detection system (KSDS) software update and the recall repair had already been performed on the vehicle. The contact stated that a failure related to the recall recurred while driving. The contact stated while driving approximately 60 MPH, the vehicle stalled. No warning light was illuminated. The contact was able to get the vehicle to the shoulder of the highway. The vehicle was towed to the residence, where the contact was able to drive the vehicle again; however, the failure recurred several times. The vehicle was taken to the dealer, where it was diagnosed with a fuel pump failure, and an oil leak. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 150,000.

NHTSA complaint #11579393 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE

The contact owns a 2011 Hyundai Sonata. The contact stated that the vehicle failed to start, and the low fuel light was illuminated. The contact stated that the alternator was replaced prior to the failure. The vehicle was refueled by a tow truck driver. The contact stated that after several days, the vehicle drove as needed; however, the failure reoccurred at a drive-thru. The vehicle was towed to a nearby hotel. The low fuel warning light was illuminated. The vehicle was then towed to the dealer, where it was purchased. The dealer diagnosed the vehicle and determined that the fuel pump had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred a week later. The contact stated that while driving at approximately 40 MPH, there was fuel leaking out of the fuel pump gasket. The vehicle was taken back to the dealer where the fuel pump was replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 160,000.

NHTSA complaint #11578253 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I changed my oil on Saturday and it now has no oil. The engine light started flashing and my engine seized up. Now it does not run at all. It turns on halfway where the dashboard turns on but the motor/engine does not turn. It appears to be white smoke coming out of the car after trying to turn it back on.

NHTSA complaint #11578374 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

My 2011 Hyundai sonata Engine failed in April 2023. Was towed and the engine was replaced due to the recall. Got car back November 4th 2023. Fuel gauge never went out and after driving about 3 miles the engine light came on. Dec 13th was driving on highway and felt like the car was going to fall apart. Able to get off highway only for the car to die. Every light including some I have never seen came on. Was stuck on the side of the road with my ESA dog in 28°. Temp. For over an hour with no power and hazards starting to dim. I'm disabled and had no help. Local PD towed vehicle and drove me home. Car sat at tow yard collecting fees as I was waiting for the dealership to call me back. Finally got help with paying the tow yard company only to be stuck once again for over an hour in the cold and then denied a tow to the dealership since they decided to cancel my appointment by text while I was on with Hyundai roadside assistance. They denied any help. Luckily the tow yard felt bad and made a call for me and a friend came and paid the 160.00 tow truck to get the car back to my house. They have now not returned my calls and the case manager has not responded as well. This is unacceptable. I don't have any money and I have no idea how they can get away with treating a disabled person in the winter days before Christmas by letting me be stranded twice on the side of the road with an engine that has less than 10 miles on it.

NHTSA complaint #11562229 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

2011 sonata se 2.0t door lock’s acting up won’t open or lock fuel smell in the car really strong and not measuring the gas keeps going up and down and at times I don’t even know if I have gas or not and when filling gas at the gas tank entrance where you fill up at won’t let me fill up gas keeps getting spit out when I’m filling and I have to keep clicking the gas gun and not put pressure have to fill it very slow

NHTSA complaint #11542214 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

1) Fuel gauge readings are erratic, empty one minute then full the next then back to empty or in between regardless on actual fuel level. 2) Safety at risk if fuel pump malfunctions and gas gauge readings erratic. 3) Problem has been noted in numerous blogs, internet sites. 4) No open recalls yet this is a serious problem. 5) The only warning lights are fuel gauge flashes empty, but then goes away then comes back. 6) Cause per blogs is defective fuel sending gauge on fuel pump. Mileage at approximately 128k recurring issue, fuel pump failure possibly at high speeds could cause deaths if vehicle out of drivers control.

NHTSA complaint #11527992 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Smell of fuel & starting issues. The car has been taken to the dealer multiple times regarding gas fumes and they could not find anything. And it is currently at a mechanic shop to for same reason. When you start the car it doesnt take long before the whole car smells like gas & the smell is so strong it is suffocating. The car is health & fire risk. Also the car sometimes doesnt want to start for days but the starter, battery, alternator all work & even the mechanic doesnt know whats wrong with it. Apperantly there is no recall & if you search online there are alot of people with same cars complaining about gas smell & starting issues..

NHTSA complaint #11515341 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I'm smelling has from under the car and it's got a ticking sound and burning oil it looks like

NHTSA complaint #11508824 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I started smelling a strong fuel odor and my car just started leaking fuel while I was driving it.

NHTSA complaint #11498360 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

In May 2022 the engine was recalled and replaced by Schomp Hyundai located at 100 Havan St, Aurora, CO 80010, and I purchased this car right after the engine recall. Since I bought the car vehicle the engine has been making noise and the AC and heater smell gas and burned fuel inside the vehicle through cabin air vents. I took the car to the Schomp Hyundai and asked them to fix the noise problem as the engine is not properly installed but they refused to fix it and asked me to pay $180 to diagnose the problem and to pay additional for the fix. The second time when I took the car for the gas and fuel fume and I was told that it is not part of the engine warranty; I have to pay $180 to diagnose the problem and pay additional for the fix. As the engine was replaced, the service may have resulted in damage to the high-pressure fuel pipe. While maneuvering the engine into place, the fuel pipe may have been crushed, poorly torqued, or simply not aligned properly. The dealer is not accepting any responsibility.

NHTSA complaint #11494562 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

when driving randomly the cars engine will rev really high while pressing the gas pedal but the car doesn't move. After a little while the car eventually makes a loud clunking noise which shakes the car and typically causes the tires to spin. It seems to happen when the car is trying to decide whether to switch the gas engine or back to EV mode. This has been happening for a long time an even after the engine was replace under the recall. This is a safety issue that causes major concerns for myself an passengers. Also it happen when turning onto highways or exits which at high speeds there is a high likelihood of causing an accident. I have reported this to Hyundai several times but they cannot figure out the cause but rather keep trying different things an charging me. the car also seems to burn oil fast which doesn't make any sense being that its a newly installed engine.

NHTSA complaint #11493938 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE

The contact owns a 2011 Hyundai Sonata. The contact stated that the dealer previously replaced the fuel tube; however, the failure recurred while driving at an undisclosed speed, and a fuel odor was detected while the defroster was activated. Upon inspection, the contact noticed that there was fuel leaking in the engine. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 115,000.

NHTSA complaint #11489725 — an unverified report by a vehicle owner.

FUEL SYSTEM, GASOLINE

The contact owns a 2011 Hyundai Sonata. The contact received notification of NHTSA Campaign Number: 18V934000 (Engine, Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated that the vehicle would accelerate whenever the volume for the radio is turned up. The vehicle would suddenly accelerate inadvertently when other functions of the vehicle were activated. The vehicle also suddenly stalled at various speeds, causing the contact to turn off and then restart the vehicle several times to regain normal functionality. The brakes also failed intermittently. The vehicle displayed a warning light however, the contact was unsure of the meaning. The failure mileage was unknown due to odometer fraud that was linked with the vehicle. Parts distribution disconnect.

NHTSA complaint #11483332 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Hyundai recalled my vehicle twice for GDI ENGINE INSPECTION/REPLACEMENT (Recall 132). Subsequently, my vehicle was recalled a 3rd time for HIGH-PRESSURE FUEL PIPE INSPECTION AND REPLACEMENT (Recall 180). During this recall, the dealership inspected and DID NOT replace or repair any equipment. 4/12/2022 I smelled gasoline and took my vehicle to an Auto Shop for inspection. The technician explained that the HIGH-PRESSURE FUEL SYSTEM was leaking fuel significantly and was an extreme safety hazard. I contacted Hyundai Manufacturer right away due to my knowledge of Recall 180. Hyundai set me up with a Dealership Service appointment and I had the vehicle towed to the dealership for safety. The Dealership refuses to honor the recall (Recall 180) and after several phone calls, emails, and tweets; I am still unable to get reconciliation from Hyundai Consumer Affairs. For context, please understand that this Dealership is the same Dealership that FAILED to repair or replace anything when I took my vehicle in for recall (Recall 180). Please help!

NHTSA complaint #11461474 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

All the lights appear os dash. Tpms, taction control, maintenance check engine, , brake malfunction message power steering light. Car start beeping alarm. Transmision weard beheaving. Brakes weard, acceleration. Scare moments, stop the car. Dangerous driving. After 5 mjnutes problem desapear and afret 10 more milles problem appear again. Bring car to the dealer february 10th for diagnostic they charge 457.38 dolars fr diagnostic. Almost a month after they found anything nothing. Feel robbed by dealer.

NHTSA complaint #11455486 — an unverified report by a vehicle owner.