2003 Hyundai Sonata Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Hyundai Sonata
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
2003 Hyundai Sonata ProblemsRough Idle Due to Faulty EGR Switching Valve
On the 2.7L V6 and 2.4L 4 Cylinder, a defective exhaust gas recirculation (EGR) switching valve may cause an intermittent rough or unstable idle engine.
If the automatic transmission does not shift properly and the Check Engine Light illuminates, the speed sensors in the transmission may have failed. The sensors are simple and inexpensive to replace.
Concerned about safety, the NHTSA is investigating reports of rust forming at the front suspension mounting points, the frame, and the sub-frame. Some of these vehicles may have been recalled for this issue. For more information, please click here»
2003 Hyundai Sonata QuestionsWHAT DO I REPLACE WHEN MY REMOTE WILL NO LONGER OPEN MY TRUNK? (1 answer)
I have checked the fuses, I don't know what this could be. I drove it 9 hours earlier and it was fine. There has never been any kind of problem with it. The only thing I've noticed is the negative post cover is very loose. But do you have any other ideas?
MY BOYFRIEND TOLD ME TRANSMISSIONS NO LONGER HAVE BELTS. WHEN I AM DRIVING THE TRANSMISSION SOUNDS LIKE IT IS SLIPPING SOME BEFORE THE GEARS CATCH. i BELIEVE ITS THE BELTS THAT HAVE WORN . AM I RIGHT OR IS IT SOMETHING ELSE. ALSO THE RPMS DON'T GO OVER 2500. I WAS TOLD I'M OK THERE.