Usually in a good repair kit that will include any needed bearings.
Or buy a manual ( I Strongly recommend this option)
http://www.modifiedlife.com/2003-hyundai-sonata-car-radio-stereo-audio-wiring-diagram/
The 2003 Hyundai Sonata has 16 valves.
Timing BELT because I have changed once and mine was a 2003 so I am sure it is since I haven't heard of a timing chain car in Hyundai.
The 2003 Hyundai Sonata is a gas-powered vehicle.
The 2003 Hyundai Sonata has an inline 4 engine.
The 2003 Hyundai Sonata has a 5-speed manual.
Inside the timing case with the timing belt and balance shaft belt.
Yes, it is a zero tolerence engine.
The 2003 Hyundai Sonata has double overhead cam (DOHC).
The 2003 Hyundai Sonata runs on regular unleaded.
The 2003 Hyundai Sonata's turning circle is 34.4 ft..
The height of the 2003 Hyundai Sonata is 4 ft. 8 in. (56 in.).