hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
55,283 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.

2006 Hyundai Sonata engine problems

engine problem

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2006 Hyundai Sonata Owner Comments

problem #15

May 212015

Sonata 6-cyl

  • 133,793 miles


I was driving home and slowed to let someone in front of me turn left into a grocery parking lot. The car suddenly started surging mad I could not stop it with the brake pedal all the way to floor. However, I did hit the car in font of me, with no damage to her car. I had popped the front right side of the bumper on my car. So we went on with our business when she found no damage to her vehicle. I had to turn the car off to stop the car from moving. I called the dealer glenn Hyundai and told them of the incident, they in turn told me this would be nearly impossible for this to happen! it did happen!! they called me after receiving the vehicle via tow truck and told me the throttle was dirty and needed to be cleaned. So I told them go ahead and then about half hour later they called and said the car needed a throttle position assembly replaced. They had already charged me for the cleaning of the throttle, and then charged me to replace it also. Doesn't cleaning come with replacing the throttle assembly" I think this should be investigated and to see how many other Hyundai's have had this problem. They supposedly contacted Hyundai corporate usa, however, I have yet to hear anything from Hyundai. I really hope all is safe now???"

- Paris, KY, USA

problem #14

Feb 112015


  • 111,907 miles
Oil leaked from valve cover onto alternator. Engine stalled and left me stranded on rural mountain road. Finally got towed home. Mechanic says it will cost nearly $1000 to replace valve cover gaskets and alternator. Car is 2006 Hyundai Sonata with 3.3L 6cyl engine. I believe that this is the same engine and same problem that prompted the recall on 2007 Hyundai veracruz NHTSA campaign number: 14V415000. The existing recall should be expanded to include more Hyundai vehicle models that exhibit the same problem.

- Vancouver, WA, USA

problem #13

Jan 182012

Sonata 6-cyl

  • 100,000 miles
My car is a 2006 Hyundai Sonata and last night my cars' headlights dim or shut off momentarily, the fan speed seems to drop for a second also but never shuts completely off. I noticed last night my tachometer would only go to a 1 at the lowest. It would go higher as I drove but never back down towards a 0 or 1. you could feel the harsh vibration as I sat at a stoplight while it rested at 1. I also noticed that it feels like the trans is slipping or something as I take off or try to turn. This is the first time I have ever experienced this with this car. This is extremely dangerous!! what if the gas pedal sticks or the lights go out while driving"?" I have 2 small children and you bet I would sue or my family would on my behalf if anything happened to us as a result of Hyundai not issuing some kind of recall. Please address this issue asap as to avoid any future problems that could have been corrected by a simple recall.

- Manhattan, IL, USA

problem #12

May 012011


  • 46,000 miles


The contact owns a 2006 Hyundai Sonata. The contact stated that as soon as he started the vehicle, the engine would generate a rattling noise from the timing chain. A certified mechanic inspected the vehicle and diagnosed that the timing chain tensioner needed to be replaced. The manufacturer was made aware of the failure who did not offer any assistance since the vehicle was no longer under warranty. The vehicle was not repaired. The failure mileage was 46,000 and the current mileage was 50,000.

- Rancho Cucamonga, CA, USA

problem #11

May 052011


  • 71,000 miles
The contact owns a 2006 Hyundai Sonata. The contact stated that while parking, she heard a loud popping noise. When she inspected the vehicle, she noticed that the compression pulley in the engine had broken. Because of the failure, the vehicle was unable to be driven. The vehicle was not inspected or repaired. The manufacturer was not aware of the failure. The current and failure mileages were approximately 71,000.

- Chaparral, NM, USA

problem #10

Apr 012010


  • 70,000 miles
The contact owns a 2006 Hyundai Sonata. The contact stated that the engine oil leaked and damaged the alternator. A mechanic replaced the alternator but the oil leak was not repaired. The vehicle was taken to an authorized dealer who stated that the failure was caused by the engine casing. The vehicle was repaired. The failure mileage was approximately 70,000 and the current mileage was approximately 100,000.

- Chicago , IL, USA

problem #9

Sep 012009


  • 72,000 miles


The contact owns a 2006 Hyundai Sonata. The contact stated that the vehicle would sporadically stall when driving at any speed. The check engine warning light would illuminate prior to the failure. The vehicle was taken to an independent repair facility for diagnosis. The mechanic advised that the main computer sensor was defective. The vehicle was not repaired. The VIN was not available. The failure mileage was 72,000 and the current mileage was 102,000.

- Russia , OH, USA

problem #8

Aug 082009


  • 44,000 miles
The contact owns a 2006 Hyundai Sonata. The contact stated that the vehicles stalled while driving between 45 and 55 mph. When the failure occurred all of the power steering and power brake functions malfunctioned. The vehicle was taken to the dealer twice for diagnostic testing and they were unable to diagnose the failure. There were no error codes. Hyundai was also notified and stated that they were unable to diagnose the failure. Case # 4011415 was filed by Hyundai. The failure mileage was approximately 44,000. The current mileage was 51,500.

- Comanche , IA, USA

problem #7

Apr 152007


  • 35,000 miles
When accelerating from a stop or slow turn, "check engine" and "ESC off" light come on. The vehicle acts as if it is in neutral, with no gas power or brake control, but the car is running and all other electrical functions are working (windows, radio, etc). It shimmies and shakes. You have to coast to the side of the road and restart numerous times to get it to run properly. The check engine light remains on for several hours and then shuts off. This started about 6 months after I purchased the used car in 2006, and is intermittent but still has the problem. It will act up several times a day for months then nothing. This should be considered a safety issue, having to stop in single lanes with no shoulders, on railroad tracks, or intersections and restart numerous times to get it running again. Took to merced ca Hyundai they replaced tsp wiring, which did not help. Of course it appeared ok as it takes time for the problem to repeat. Have been unable to return to shop, with the inconvenience of having to take time off work, drive 30 miles to the dealer, and pay for car rental. I live in a rural area and bought a fairly new car to be reliable. This was not it.

- Chowchilla, CA, USA

problem #6

Feb 022009

Sonata 6-cyl

  • 4,000 miles
Engine coolant leaks from the engine compartment unto the ground. Coolant began leaking 6 months after I purchased new 2006 Hyundai Sonata V6. Leaking stopped and has now started leaking again.

- Minocqua, WI, USA

problem #5

Nov 262008


  • miles


2006 Hyundai Sonata. Uncontrolled acceleration when passing another car about 55mph. Engine seemed to run away and brakes would not slow car. About 3 times this year. Taking car back to Hyundai.

- Howard Beach, NY, USA

problem #4

Sep 172007


  • 43,191 miles
Heard small knock in engine, told it was standard fuel injector knock. At 43K, my husband driving on pa turnpike -- knock starts pounding. But no check engine light. As he is getting off to a rest area, knock goes crazy, engine starts smoking, and the check engine light comes on. Engine overhauled, not replaced under warranty. Three subsequent related repairs. 2006 Hyundai Sonata.

- Landenberg, PA, USA

problem #3

Jul 242008


  • 47,200 miles
Good morning! I am having problems with my Sonata and I need assistance and advise. My vehicle has broke down with me on 3 occasions with the same problem. I am concerned because my warranty will be running out at 60,000 miles and I am concerned about my safety. The belt that goes from the A/C to the motor and the alternator continues to fray and burn up in pieces. At this point the car is inoperable. I was told by the Hyundai dealership that they have replaced these belts with chain belts on the new Sonata's because of this problem. Everytime I have had it repaired they told me that it would not happen again and it has happened (3) times. I contacted the Hyundai company last Thursday and no one has contacted me or made an attempt to talk with me. Thank you for your assistance with this matter. Marcia smith

- Brandon, MS, USA

problem #2

Apr 012007

Sonata 6-cyl

  • Automatic transmission
  • 12,000 miles
The contact owns a 2006 Hyundai Sonata. While driving 20 mph, he heard a loud banging noise coming from the rear of the vehicle. The contact stated that the noise was louder while making a turn with a passenger seated in the rear. The dealer inspected the vehicle on two occasions; the first time they were unable to diagnose the failure and the second time the dealer adjusted the rear suspension. The suspension adjustment failed to solve the failure. As of October 9, 2007, the dealer had not repaired the vehicle. The failure mileage was 12,000 and the current mileage was 16,997. The dealer stated the front right door lock inoperable, passenger seat area makes a rattling sound, right trunk trim vibrates when vehicle in motion and hears knocking sound in the engine. Updated 10/23/07

- Bointon Beach, FL, USA

problem #1

Sep 192006

Sonata 6-cyl

  • Automatic transmission
  • 39,149 miles
Issue for 2006 Hyundai Sonata gls V6 (1)driving in san francisco area with respecting local traffic laws. (2)suddenly ESC failed and engine lost its power. The speed of the vehicle dropped to 15 miles/hour and was unable to accelerate more than 15 miles/hour. It caused a close chance of rear-collision accident. (3)dealership replaced with new parts. Lasted 10 days and the problems have continued. The service advisor of cammisa Hyundai explained to me, that they were unable to find the reasons for failures. No date for repair has been promised.

- San Francisco, CA, USA

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