The contact owned a 2011 Hyundai Sonata. The contact initially stated that while driving at various speeds, an abnormal, knocking noise would emit from the engine. The contact had taken the vehicle to the dealer where a knock sensor test was performed and the contact had the engine replaced under warranty. A few months later while driving at night at 35 MPH, smoke(color unknown) began to emit from…
2011 hyundai Sonata engine problems
severe 688 complaints filed with NHTSA · avg repair $3,100
Complaints
688
Recalls
0
Crashes
7
Avg fix
$3,100
What owners are reporting 3 most recent
ON 7-18-2017 MY 2011 HYUNDAI SONATA LOST POWER AS I WAS DRIVING IN THE CITY AND I WAS ABLE TO COAST TO SAFER PLACE OFF A BUSY ROAD. IMMEDIATELY FELLOW DRIVER ALERTED ME THAT THERE IS FIRE UNDER THE FRONT OF THE CAR. 911 WAS CALLED BUT THE FIRE DEVELOPED VERY QUICKLY AND THE CAR WAS NOT SAVED. SPECIAL CHEMICALS WERE USED TO PUT OUT THE FIRE. THE POLICE ORDERED THE VEHICLE TO BE TOWED. ON 7-19 I …
ON 7-18-2017 MY 2011 HYUNDAI SONATA LOST POWER AS I WAS DRIVING IN THE CITY AND I WAS ABLE TO COAST TO SAFER PLACE OFF A BUSY ROAD. IMMEDIATELY FELLOW DRIVER ALERTED ME THAT THERE IS FIRE UNDER THE FRONT OF THE CAR. 911 WAS CALLED BUT THE FIRE DEVELOPED VERY QUICKLY AND THE CAR WAS NOT SAVED. SPECIAL CHEMICALS WERE USED TO PUT OUT THE FIRE. THE POLICE ORDERED THE VEHICLE TO BE TOWED. ON 7-19 I …
Common questions
How serious is the engine problem on the 2011 hyundai Sonata?
It's a meaningful issue. 688 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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