really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
107,000 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 fuel system problems

fuel system problem

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2004 Hyundai Sonata Owner Comments

problem #2

Oct 012014

Sonata 6-cyl

  • 129,000 miles


Split fuel tank on the side, 2nd fuel tank to fail in the last 5 years. Hyundai claims there is no problems with fuel tanks, but google the Sonata fuel tanks and there is a ton of complaints. Hyundai will do nothing about it. No recall, no nothing. House and garage has severe gas smell and a large puddle of gas on the floor.

- Mt Vernon, , WA, USA

problem #1

Mar 052013


  • 85,000 miles
Backing into the garage, my foot on brake, the engine suddenly revved to high RPM, the car shot backwards, propelling a heavy rubber mat on which the car is normally parked out of the garage and into the driveway. The vehicle then impacted and crashed through the rear garage wall before coming to a stop. I managed to pry the gear lever out of reverse, hit drive instead and sent the car, wheels still spinning and laying down rubber, forward out of the garage. On its way out the car swiped along the right side the garage door post before finally coming to a stop in the driveway. Final result, serious damage to both the car and the garage. Fortunately this did not occur in traffic or with pedestrians in the area. On-line research has since shown me that there have been numerous other similar incidents where Hyundai Sonatas have suddenly accelerated on their own. See

- Battle Creek, MI, USA

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