1999 Hyundai Sonata GLS Engine cooling Problems
- Complaints
- 5about this part
- Share
- 11%of 46 total for the year
- Median mileage
- 87,362miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine cooling of the 1999 Hyundai Sonata GLS, 11% of the 46 complaints for this model year. Where a mileage was given, the median is 87,362 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.
“The engine will intermittently race increasing rpms without notice, very dangerous. It happened while sitting at a red light. If my foot was not pushed down on the brake I would have hit the car in front, it will also occur while in park with the engine rpms going up to 3200 and down to 1500 like it was a hunt lasting several minutes. It will stop ,but I can't figure out how or why. It seems to be worse when driving at sustained higher speeds on interstate, then getting off the exit. …”
NHTSA complaint #10191164, filed 2007-05, 150,000 miles“Purchased car august 16th 2001 shortly after purchase about 3 months later the check engine light came on so I took it back to the place of which I purchased it wyatt johnson Hyundai dealership in clarksville tn . At that time the o2 sensor had went bad so that was replaced and we were also advised that it was way past due on transmission fluid which was their fault so they replaced that as well. A few months went by and the same thing happened again. These were once replaced again on the opposite side of the car. …”
NHTSA complaint #10016967, filed 2003-05, 34,000 miles“The engine light continues to go on whenever I change gas stations, or level of octane when I put gas in my car. This will also cause the car not to start occassionally and emit black smoke from the exhaust before starting again. I brought it to the original dealer (milford, ct) numerous times where they just reset it because they could not locate the problem. …”
NHTSA complaint #10114113, filed 2005-03Related service bulletins
- 10247189Oct 13, 2023This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
- 10217251Jul 28, 2022Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or…
- 10190044Mar 30, 2021This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance…
- 10189989Mar 10, 2021This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below.
- 10030984Jul 1, 2009Hyundai: automatic transaxle range switch diagnostic trouble codes p0705 (range switch signal problems), p0707 (range switch open circuit), and p0708 (range switch short circuit…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1999 | 5 | 11% |
Other parts of the 1999 Hyundai Sonata GLS
35 complaintsSuspension
11 complaintsAir bags
6 complaintsTransmission and drivetrain
3 complaintsSteering
2 complaintsTires
1 complaintsWheels
1 complaints
← All problems reported for the 1999 Hyundai Sonata GLS
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