really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
41,798 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 miscellaneous problems

miscellaneous problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2004 Hyundai Sonata:

Unsubscribe any time. We don't sell/share your email.

2004 Hyundai Sonata Owner Comments

problem #5

Aug 192016


  • 0 miles


Severe corrosion on front subframe. It is a recall but no feedback from Hyundai. Salt belt corrosion (lawsuit) again no feedback. Extremely dangerous, could result in injury

- Garden City, KS, USA

problem #4

Feb 012015


  • miles
Engine code P0401 replaced egr valve twice and light is still illuminated

- West Bridgewater, MA, USA

problem #3

Sep 252015


  • 38,000 miles
Extensive undercarriage rust and corrosion even though vehicle looks brand new on body and interior and has <40,000 miles. Rust has extended into brakes submounts. Been told by mechanic it may be unsafe to drive as lower control arm or brake lines could corrode through and cause collision. Hyundai states is not covered under recall, even though purchased and driven in pa.

- Satellite Beach, FL, USA

problem #2

Nov 112014

Sonata 4-cyl

  • 109,000 miles
We own a 2004 Hyundai Sonata (109,000 miles) we had a front end collision with significant damage. Me and my wife suffered minor injuries and the airbags did not deploy. We found out on the internet that there are frequent complaints if this failure around the nation and also in many Hyundai models across multiple years. We are filing the complaint since the error is critical and seems to be systemic in Hyundai vehicles. We do not know if NHTSA handles cars that are over 100,000 miles but we felt a complaint was warranted since the consequence of the error is so extreme. We fear for our safety with this vehicle now! being a disabled veteran, on a fixed income, we find it difficult to accept that Hyundai takes no responsibility for this problem. Its not easy for us to replace the car.

- Burlington, NC, USA

problem #1

Oct 062013


  • 61,991 miles
This is a complaint, there was not an accident. There is a clunking noise from the rear suspension area. I have had the rear struts replaced and one bushing on the right side. I have had the vehicle checked by the dealer and four independent shops. The dealer says they cannot find anything wrong. The independent shops hear the noise but can't locate where it is coming from. On the internet there are many references referring to the issue. I am reluctant to travel a distance not knowing the cause of the noise. I have written to Hyundai. They say they do not have any record of complaints relating to this issue. I am in the market for a new car but would not sell or trade in not knowing the cause of this problem.

- Menasha, WI, USA

Not what you are looking for?