Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2011 Hyundai Elantra owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2011 Hyundai Elantra. The contact stated that while driving at an undisclosed speed, the vehicle hesitated during acceleration with the check engine warning light illuminated. The vehicle was taken to several independent mechanics who diagnosed that the engine and battery needed to be replaced. The dealer was made aware of the failure but provided no assistance. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.
The contact owns a 2011 Hyundai Elantra. The contact stated while driving 40 MPH, she heard an abnormal sound coming from the front of the vehicle. The contact stated no warning light was illuminated. The contact was able to continue driving to her destination. The contact took the vehicle to the local dealer, where it was diagnosed with needing a piston to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 123,500.
The contact owns a 2011 Hyundai Elantra. The contact stated that the vehicle was serviced at the dealer for an engine failure and after retrieving the vehicle the check engine light would remain illuminated while driving. The vehicle was taken back to the dealer who diagnosed that the engine was again faulty and needed additional repairs. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 109,000.
My car stalls while in motion without warning. While driving the vehicle will randomly speed up and rpm will fly up without command. I also experience a lot of engine power loss randomly the vehicle will bog and be slow. Occasionally when I press on the accelerator I can almost go to the floor with no response from the vehicle. Speed acceleration response is delayed approximately 30 seconds occasionally. Uncommanded acceleration and random stalling when vehicle is in motion has been a big safety risk for me. This issue has been ongoing for awhile. This issue has occurred countless times so it's very frequent. This complaint is in compliance with the current open investigation regarding the throttle control system vulnerabilities. NHTSA Action Number: DP21003
10 am Sunday morning going to church I am about 2 miles away from home I started hearing trickled sound at front before entering the freeway. Then about 5 miles before my exit the noise start to get louder and I decided to go 25 mph after I exited the freeway. I stopped at AutoZone parking lot to check and didn't find anything unusual.No engine lights or anything on the dashboard. After 2 hours parked at AutoZone I drove it home at slow speed and decided not to use the freeway so I can keep moving 25 mph max. It's a scary situation and good thing is I'm the driving not my wife. It has closed to 130,000 miles.
I have a Piston/Engine Defect according to the mechanic at the car shop. Any time any acceleration is applied you can hear the knocking. I believe it should be covered through the class action alleged that 2011-2016 Elantras engines (including the Limited trim) have a piston defect leading to engine failure. A settlement offered extended warranties, engine repairs, and reimbursement. I was unaware and have already spent tons of money towards repairs to the engine over the years. Now I am aware of this lawsuit and would like some kind replacement.
UnKnown. When financing the vehicle through Adonis Auto Group I was unaware of the unrepaired safety recall. Also I am under the impression nothing was done to the car before purchasing it, I have had to make repairs to the car only after 10,000 - 15,000 miles of driving. For example replacing the control arm, axle, brake hardware. My point is they are selling cars without repairing them and not advising the customer upon purchase. I also asked for the repair paperwork for what has been done to the car before purchase and never received it.
Car stop working once I got home I notice while I was driving the car kept back firing and Jurking while driving .had a mechanic look at the car he tried to start it but it started and shut off..he even tried to jump start the car with the jumping cables but it will not start..he told me it was electrical..I have a brand new battery and a complete tune up on the car..I have not been able to drive the car in 3 weeks
When I start the engine, I hear pronounced knocking sounds in the engine for approximately 1-2 seconds, and they are quite loud. As the engine warms up, the knocking persists, albeit at a lower volume. The ongoing knocks are not as loud, resembling a consistent noise similar to that of a diesel engine, although it is not a diesel-powered vehicle
The 2011 Hyundai Elantra false starts. I've changed the battery and gotten a tune up. I've taken it into the dealership and paid for a diagnostic, even the Hyundai dealership says they cannot explain why the car is false starting. I believe it is my engine. But why isn't my car Included in the engine recall?
Engine complaints in other Elantra years
Frequently asked questions
How common are engine problems on the 2011 Hyundai Elantra?
NHTSA has 97 complaints about the engine & cooling of the 2011 Hyundai Elantra, 22% of the model year's 433 complaints. The component named most often is exhaust system (1 mentions).
Is there a recall for 2011 Hyundai Elantra engine problems?
No. NHTSA lists no engine & cooling recall for the 2011 Hyundai Elantra, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2011 Hyundai Elantra engine problems start?
Half of the complaints with a recorded mileage happened before about 79,000 miles, and 7% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 3 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.