Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
83,120 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.

2004 Hyundai Sonata engine problems

engine problem

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2004 Hyundai Sonata Owner Comments

problem #5

Jan 052015


  • 140,000 miles


Took car to mechanic for fuel pump work. He informed us that the engine cradle is rusted beyond repair and is un-safe to drive. I found the recall online and called Hyundai. They informed me that remediation had been done in 2009. (a new hole for drainage had been drilled in the engine cradle frame and a sealant applied). Evidently this did not stop the corrosion of the frame and caused a weakening of the frame and a crack in the structural area of the frame. Is Hyundai liable to repair this defect? I can supply pictures of the defect and crack in frame if necessary.

- Rittman, OH, USA

problem #4

Aug 092010


  • 85,000 miles
2004 Hyundai Sonata gls dies randomly when stopped at a red light or turning at a low rate of speed, then starts right up and may not do it again for a month or a few days. Check engine light does not come on and vehicle runs great besides dying in traffic which could cause a crash.

- Rockfield, KY, USA

problem #3

Dec 172008


  • 44,100 miles
While driving my 2004 Hyundai Sonata at low speed, the engine suddenly died. This caused me to lose power steering and power brakes. Fortunately there was space for me to pull to the curb and no one was behind me. After an hour or so of trying the car started up and I drove it home. Three days later it happened again on a busy street at about 10 mph. Again I was fortunate and could pull to the curb. This time I could not start it and had it towed to a local repair shop. They diagnosed it as a "defective evap. Solenoid that was causing engine flooding." This was a very scary occurrence--if it happened on a highway it would be very difficult to steer (due to loss of power steering) and my sudden slowing could cause rear-end crash. The old part is not available.

- Santa Cruz, CA, USA

problem #2

Oct 202008


  • 120,000 miles
2004 hyndai Sonata stalls on highway.

- Newton, NJ, USA

problem #1

Nov 142005

Sonata 4-cyl

  • Automatic transmission
  • 26,500 miles
The contact experienced problems with starting the vehicle on two occasions. When it occurred the first time he attempted three times before the engine turned over. The second time the key remained in the ignition for four minutes before the vehicle would start. Also, the dealer stated the problem was intermittent, and only occurred once. Because the dealer was unable to duplicate the problem no repairs were done.

- Flemington, NJ, USA

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