Skip to content
Engine coolingPart report

2004 Hyundai XG350 Engine cooling Problems

Complaints
4about this part
Share
4%of 91 total for the year
Median mileage
35,426miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine cooling of the 2004 Hyundai XG350, 4% of the 91 complaints for this model year. Where a mileage was given, the median is 35,426 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I'm a single mom and have no family here in ct. To help me or guide me in this sort of thing. My car started making a knocking noise under the hood. I didn't know what it was so I took it to my mechanic. It took a couple of days before some one there could look at it. He told me it was an engine knock and said I should take it back to the dealership to get it fixed. By the time I contacted key in milford ct, my car was out of warranty by eight days. And that's all they kept telling me. Keep in mind, I brought the car to my mechanic the day before the warranty expired. …”

NHTSA complaint #10264790, filed 2009-04, 46,052 miles

“The contact stated while traveling various speeds, the check engine light illuminated 6 different times. The vehicle was taken to the dealer on 6 occasions, but the problem could not be determined. On one visit, the pcv valve was replaced, but the problem persisted. On the other 5 visits, the vehicle's codes were reset, but the problem persisted.”

NHTSA complaint #10172328, filed 2006-11, 66,954 miles

“The contact stated while changing lanes, the engine and transmission did not respond to one another. The vehicle would not accelerate or decelerate. The dealership was unable to duplicate the problem.”

NHTSA complaint #10148378, filed 2006-01, 20,000 miles

“The contact stated the vehicle intermittently lost power while driving at speeds above 40mph. The vehicle resumed power after brought to a stop. The only warning indicator is the tcs light flashing during the reduction of speed. The vehicle was taken to a service dealer two months ago and the dealer replaced the fuel pump, filter and lines. The problem became worse and the vehicle was returned to the dealer who recommended getting a wheel alignment and tire rotation. This was completed at an independent repair shop, but the problem continues. …”

NHTSA complaint #10157426, filed 2006-05, 24,800 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
200564%
200444%
200315%
2002813%

Other parts of the 2004 Hyundai XG350

Vehicle speed control
22 complaints
Air bags
21 complaints
Brakes
14 complaints
Suspension
14 complaints
Body and structure
12 complaints
Electrical system
8 complaints
Engine
5 complaints
Transmission and drivetrain
5 complaints
Fuel system
4 complaints
Other or unknown
4 complaints
Steering
4 complaints
Equipment
2 complaints

← All problems reported for the 2004 Hyundai XG350

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology