CarComplaints.com Notes: The 2011 Sonata has a seriously defective engine that seizes without warning. It was awarded the dubious honor of being the first CarTalk / CarComplaints Turd of the Week in late September 2015.

A class action lawsuit was filed in May 2015 against Hyundai that claims the 2.4L Sonata engine is defective. More info here.

10.0

really awful
Crashes / Fires:
8 / 16
Injuries / Deaths:
2 / 0
Average Mileage:
65,354 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Hyundai Sonata engine problems

engine problem

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2011 Hyundai Sonata Owner Comments (Page 9 of 18)

« Read the previous 20 complaints

problem #184

Mar 132015

Sonata

  • 85,000 miles

A D V E R T I S E M E N T S

While driving on the highway, the car began shaking and a clicking noise. The car lost power. The engine through a rod and blew the cam - upper and lower half of the engine block.

- Waldorf, MD, USA

problem #183

Aug 102015

Sonata

  • 73,000 miles
My car was making a knocking noise and would continue to get louder as I pressed the accelerator. I was told the engine had to be replaced which I did at car pros Hyundai in renton, wa. My Hyundai warranty would not cover the engine replacement. I was told it was my fault after only owning the car for a little over a year.

- Seattle, WA, USA

problem #182

Oct 312015

Sonata

  • 75,000 miles
The contact owns a 2011 Hyundai Sonata. While driving approximately 70 mph, the vehicle decreased speed independently and the check engine warning indicator illuminated. The vehicle stalled and, after several attempts, restarted. The failure recurred multiple times. The contact received notification of NHTSA campaign number: 15V568000 (engine) however, the parts were unavailable to perform the repairs. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall remedy. The manufacturer was notified of the failure. The approximate failure mileage was 75,000.

- Miami, FL, USA

problem #181

Jun 232014

Sonata

  • 51,174 miles

A D V E R T I S E M E N T S

The contact owns a 2011 Hyundai Sonata. The contact mentioned that the push button start failed to work and that the dealer replaced the starter once before the contact owned the vehicle. When the failure was experienced, the contact had the starter replaced by a repair shop but the failure continued. The push button start randomly failed to work. The vehicle was not diagnosed or repaired. The VIN was included in NHTSA campaign number: 15V568000 (engine), but had not received notification of the recall. The manufacturer was notified of the failure. The approximate failure mileage was 51,174. Parts distribution disconnect.

- Fernandina Beach, FL, USA

problem #180

Oct 262015

Sonata

  • 100,000 miles
The contact owns a 2011 Hyundai Sonata. While driving at various speeds, the vehicle would suddenly stall. The cause of the failure was undetermined. The manufacturer was notified. The contact also indicated that the brake lights would erroneously remain activated while operating the vehicle. The failure mileage was 100,000.

- Del Ray Beach, FL, USA

problem #179

Dec 312014

Sonata

  • miles
The contact owns a 2011 Hyundai Sonata. While driving at an unknown speed, an abnormal knocking sound emitted from the vehicle and it stalled without warning. The vehicle was able to be restarted and the engine warning light illuminated before the failure recurred. The vehicle was towed to the dealer. The technician diagnosed that the engine rod had blown and, as a result, the engine needed to be replaced. The contact recently received a notification for NHTSA campaign number: 15V568000 (engine). The manufacturer was not made aware of the failure. The vehicle was repaired. The failure mileage was unknown.

- San Antonio, TX, USA

problem #178

Oct 272015

Sonata

  • miles

A D V E R T I S E M E N T S

The contact owns a 2011 Hyundai Sonata. The contact received notification of NHTSA campaign number: 15V568000 (engine); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

- Kingsland, GA, USA

problem #177

Sep 102015

Sonata 4-cyl

  • 105,000 miles
The contact owns a 2011 Hyundai Sonata. The contact heard knocking noises coming from the vehicle mainly when accelerating. Shortly after, the contact received notification of NHTSA campaign number: 15V568000 (engine). The dealer stated that they could not hear the abnormal noises. The manufacturer was made aware of the failure and stated that the remedy for the failure had not yet been determined. The vehicle could not be repaired. The failure mileage was 105,000. The contact's VIN was associated with this recall as of September 10, 2015. Parts distribution disconnect. Updated 2/4/16 the consumer has since sold the vehicle. Updated 02/11/16.

- Disputanta, VA, USA

problem #176

Oct 212015

Sonata

  • miles
The contact owns a 2011 Hyundai Sonata. The contact received notification of NHTSA campaign number: 15V568000 (engine); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

- Lady Lake The Villages, FL, USA

problem #175

Oct 252015

Sonata

  • miles
The contact owns a 2011 Hyundai Sonata. The contact received notification of NHTSA campaign number: 15V568000 (engine); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure.

- Marvell, AR, USA

problem #174

Oct 142015

Sonata

  • miles

A D V E R T I S E M E N T S

The contact owns a 2011 Hyundai Sonata. The contact received notification of NHTSA campaign number: 15V568000 (engine) however, the part to do the repair was unavailabe. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure.

- Westerville, OH, USA

problem #173

Sep 142015

Sonata

  • 132,000 miles
The contact owns a 2011 Hyundai Sonata. While driving 25 mph, the vehicle stalled without warning. The vehicle was towed to the dealer where it was diagnosed that metal fragments entered the engine and the short block needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The VIN was invalid. The failure mileage was 132,000.

- Bellingham, WA, USA

problem #172

Nov 192014

Sonata

  • 45,627 miles
The contact owns a 2011 Hyundai Sonata. While the vehicle was parked, the contact heard an abnormal noise that was progressing randomly. The fuel gauge also displayed an incorrect reading and the interior lighting did not illuminate when the door was opened. The contact mentioned that there was an internal short within the radio and that it intermittently worked. In addition, while at a stop light, the vehicle had a strong hesitation as if it would stall. The dealer was notified and could not replicate or diagnose the failures. The contact later received notification of NHTSA campaign numbers: 15V568000 (engine) and 14V434000 (power train). The manufacturer was notified of the failures. The approximate failure mileage was 45,627.

- Bayonne, NJ, USA

problem #171

Oct 192015

Sonata

  • 110,000 miles
Driving on the highway, went to accelerate and a loud clanking begin rumbling in my engine like something was loose and moving around. All my dash lights cut on and my speed slowed dramatically. Luckily I was in a position to get over to the shoulder before being rear ended by a truck. I wonder had I been killed or seriously injured would Hyundai still be dragging their feet on finding a remedy or replacing the engines for campaign 132. This incident occurred October 19, 2015 approximately 6:15am in mechancisville, md.

- Waldorf, MD, USA

problem #170

Oct 302015

Sonata

  • 45,000 miles
While driving at 45-50 mph, on highway, experienced catastrophic engine failure and other significant component failures, resulting in a very dangerous situation for driver, passengers, surrounding traffic, noises, smoke caution lights loss of power and control. Immediate evasive action had to be taking to avoid injury or loss of life. Once at rest, vehicle continued to smoke immensely. Low mileage, very disturbing and concerned for others driving these ticking bombs! Hyundai needs to address this issue with more strength and direction.

- Kittanning, PA, USA

problem #169

Oct 222015

Sonata

  • 81,000 miles
The contact owns a 2011 Hyundai Sonata. The contact stated that while driving at 65 mph, the instrument panel lights flickered. In addition, the steering wheel made an abnormal noise and seized then the vehicle stalled. The contact coasted to the side of the road after three hours the vehicle was able to restart the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed but the diagnosis was unavailable. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 81,000.

- San Antonio, TX, USA

problem #168

Jul 222015

Sonata

  • 53,000 miles
The contact owns a 2011 Hyundai Sonata. The contact stated that a abnormal noise could be heard coming from the front of the vehicle. In addition, the instrument panel would not illuminate. The vehicle was not diagnosed or repaired. The failure was recurring. The manufacturer was not notified of the failure. The failure mileage was approximately 53,000.

- Monsey, NY, USA

problem #167

Oct 292015

Sonata

  • miles
The contact owns a 2011 Hyundai Sonata. The contact stated that while driving at various speeds, a clicking noise was heard from the hood and the vehicle stalled. In addition, various warning lights illuminated. The contact mentioned that a strong burning odor was noticed when attempting to restart the vehicle. The contact received notification of NHTSA campaign number: 15V568000 (engine) however, the remedy or part for the recall was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the failure. The failure mileage was unknown. VIN tool confirms parts not available.

- Snow Hill, MD, USA

problem #166

Oct 152015

Sonata

  • 68,000 miles
The contact owns a 2011 Hyundai Sonata. The contact stated that while driving at 60 mph, there was a loud abnormal noise. The failure only occurred when driving at high speeds. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 68,000.

- Conroe, TX, USA

problem #165

Sep 042015

Sonata

  • 84,000 miles
Loss of engine power due to turbo waste gate control rod out of specs which happens every time there is a change in weather every time weather cools down or heats up check engine light comes on and code give is turbo waste gate actuator malfunction and engine losses almost all of its power makes it difficult to move out the way at highway speed and its is a sudden loss of power it happened last year when winter rolled around then it happened again this year when summer rolled around and now fall is here and the problem is back and Hyundai wants to charge not only the adjustment fee but the diagnostic charges as well the first time it happen my car had about 30000 miles second time it has 54000 and now the car has about 84000 miles on it.

- Raleigh, NC, USA

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