Most common 2004 Hyundai XG 350 problems
Share of the 47 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Hyundai XG 350 complaints by model year
What 2004 Hyundai XG 350 owners say
Speed control & acceleration
Car experienced spontaneous acceleration ending in accident that totaled vehicle. Backed out of driveway, put car in drive, took foot off brake, didn't yet accelerate, car jolted with high rpms and caused accident.
This is an update of my previous reported found on your odi number 10118222. My car accelerated when I applied the brakes to my 2004 Hyundai xg350. This car and many other Hyundai models use a drive- by- wire system. I have found over 300 similar complaints on companies that use drive- by- wire. These cars are defective products and include 2002-2005 Hyundai, Kia, Toyota,and Mitsubishi. In my case two different Hyundai engineers could not find the problem. An independent inspector can prove I had my foot on the brake and not the gas pedal when trying to stop, but no luck. Some injuries have already been reported and perhaps there have been people killed who can not report their accident. There were 3 people killed in my area driving Hyundai cars. The report in our news paper of the accident read as if the sudden acceleration problem caused the accidents. …
Brakes
Tl* the contact owns a 2004 Hyundai xg350. The contact stated that while driving approximately 30 MPH, the vehicle erroneously accelerated to a very high rate of speed and the contact could not stop the vehicle by applying the brakes. The vehicle proceeded to travel through an intersection where a second vehicle crashed into the driver's side of the contact's vehicle. The driver and front seat passenger sustained injuries to the back. The driver of the second vehicle involved in the crash sustained minor head injuries. A police report was not filed. The contact also stated that the side and front air bags failed to deploy during the crash. The vehicle was diagnosed but the cause of the air bag and acceleration failure was not determined. The manufacturer was notified of the failure but no solution was offered. The failure mileage was 53,000.
Tl* the contact owns a 2004 Hyundai XG 350. While driving 30 MPH, the brakes applied independently. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The VIN was invalid. The failure mileage was 180,000.
Suspension
Car was inspected at mechanic during a routine oil change. Mechanic stated that the frame was rusted, which could affect the ability to safely operate the vehicle. I did a search and discovered that similar damage was noted in a recall 09-01-020 dated July 2009. Unfortunately, my vehicle was not included in the recall due to the manufacture date, but the same problem as the ones included in the recall exists.
vehicle has a front rusted subframe in two spots on passenger side it will not pass inspection. it is Dangerous to keep driving it it looks like there is a recall on this issue in 04/2009, but it says 0 unrepaired recalls which is obviously not correct Manufacturer: HYUNDAI MOTOR COMPANY Mfr's Report Date: APR 14, 2009 NHTSA CAMPAIGN ID Number: 09V124000 EA08016 NHTSA Action Number: EA08016
2004 Hyundai XG 350 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 5-speed automatic | FWD | 15 / 24 / 18 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2004 Hyundai XG 350 a good car?
There isn't enough complaint history for the XG 350 to compare model years reliably. So far owners have filed 47 complaints with NHTSA.
What is the most common problem with the 2004 Hyundai XG 350?
The speed control & acceleration — 10 complaints, 21% of all complaints for this model year. Next are the brakes (9) and suspension (9).
How many recalls does the 2004 Hyundai XG 350 have?
NHTSA lists no recalls for the 2004 Hyundai XG 350. You can still confirm with your VIN using our VIN recall check.
At what mileage do 2004 Hyundai XG 350 problems happen?
The median mileage reported in complaints is about 46,000 miles; 51% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.