2003 Hyundai Sonata Engine cooling Problems
- Complaints
- 14about this part
- Share
- 7%of 199 total for the year
- Median mileage
- 19,765miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the engine cooling of the 2003 Hyundai Sonata, 7% of the 199 complaints for this model year. Where a mileage was given, the median is 19,765 miles. 1 of these say a crash was involved, according to the filers.
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.
“2003 Hyundai Sonata EGR issues (check engine light 401)- I've been having persistent issues with my vehicle's EGR system for over a year now. I have replaced the entire EGR system including the EGR valve, solenoid, etc. I have also had to replace other parts that have failed due to the malfunctioning EGR - ignition coils, spark plugs. Even after replacing all these parts, my vehicle still complains about the EGR with check engine light constantly on (401). I have also been getting very poor mileage. I contacted Hyundai about a TSB they sent out to dealers for EGR diagnosis. …”
NHTSA complaint #10383907, filed 2011-02, 85,000 miles“This car presents with a loud clicking sound which is very distressing.once it begins it lasts for several minutes sounding for long periods and at times short bursts. I have taken it to the dealer twice and the problem has been neither identified or rectified. Until last night I have been alone in the car when this sound presents. Last night when it presented there were passengers present. Although the car did not falter it was none the less very distressing for my passengers and me. We turned off our cell phones and shut off the radio to no avail. …”
NHTSA complaint #10086379, filed 2004-08, 32,300 miles“While driving car just stops. It has done this several times but starts back up once you put in park. However this time it stop while driving and did not start back up. The first it happen I took it to the shop and they said they could not find anything wrong. Even though the check engine light was on. Now it will not start at all.”
NHTSA complaint #10279872, filed 2009-08, 90,000 miles“The engine does reliably accelerate when the accelerator pedal is pressed. Sometimes there is up to a 3 second delay before the engine responds to commands from the accelerator pedal. At times the engine also accelerates very sluggishly compared to other 2003 4-cylinder. Hyundai sonatas that have been tested. Hyundai hasn't corrected this problem despite many attempts.”
NHTSA complaint #10054825, filed 2004-01, 3,000 miles“Consumer called complaining about having problems with idle speed and vehicle will stall. Also stated that while driving the vehicle the vehicle will start loosing power on highway speed. Dealer was contacted and stated that this is a intermediate problem and unless Hyundai sends out a letter or something that states the problem they can't do nothing about it. Ts”
NHTSA complaint #10001409, filed 2002-12, 2,500 milesRelated 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.
- 10032908Oct 1, 2009Hyundai: ata solenoid diagnostic trouble codes p0740, p0741, p0742, p0743, p0746, p0748, p0750, p0755, p0760, p0765, p0770. Incorrect operation of the transaxle solenoids may…
- 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…
- 10020878Dec 1, 2006Exhaust gas recirculation (egr) system diagnosis.
- 10016160Jul 1, 20052003-2004 sonata 2.4l/2.7l tcm reprogramming instructions for driveline bump between 2-10 mph.
- 10011111Aug 4, 2004Drivability conditions.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 2 | 2% |
| 2021 | 1 | 1% |
| 2019 | 8 | 5% |
| 2018 | 14 | 4% |
| 2017 | 19 | 2% |
| 2016 | 17 | 2% |
| 2015 | 21 | 2% |
| 2014 | 21 | 3% |
| 2013 | 40 | 2% |
| 2012 | 11 | 1% |
| 2011 | 45 | 1% |
| 2009 | 6 | 1% |
| 2008 | 2 | 0% |
| 2007 | 8 | 1% |
| 2006 | 30 | 3% |
| 2005 | 5 | 3% |
| 2004 | 5 | 2% |
| 2003 | 14 | 7% |
| 2002 | 16 | 5% |
| 2001 | 23 | 11% |
| 2000 | 31 | 11% |
| 1999 | 23 | 19% |
| 1998 | 4 | 8% |
| 1997 | 7 | 14% |
| 1996 | 6 | 26% |
| 1995 | 9 | 14% |
| 1993 | 9 | 35% |
| 1992 | 4 | 18% |
| 1991 | 6 | 21% |
| 1989 | 5 | 45% |
Other parts of the 2003 Hyundai Sonata
43 complaintsBody and structure
38 complaintsElectrical system
19 complaintsFuel system
18 complaintsBrakes
15 complaintsSuspension
15 complaintsLatches, locks and linkages
13 complaintsTransmission and drivetrain
10 complaintsWheels
10 complaintsSteering
9 complaintsSeat belts
7 complaintsTires
7 complaints
← All problems reported for the 2003 Hyundai Sonata
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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