The Check Engine Light may erroneously illuminate, signifying a fault with the front oxygen sensor when no fault exists. Replacing the electrical connections at the oxygen sensor with a repair kit available from Kia will commonly fix this problem.
2003 Kia Spectra Problem Reports
RepairPal Verified 2003 Kia Spectra Problem Reports
A defective AC compressor clutch assembly can cause excessive noise or vibration when the air conditioning is on. Improved parts are available. Replacing the faulty clutch assembly does not necessitate replacement of the complete AC compressor or evacuation and recharging of the air conditioning system.
The original alternator was incapable of supplying sufficient power to the battery when the engine was idling with electrical loads (lights, air conditioning). A new, more powerful alternator and reprogramming of the powertrain computer will commonly correct this problem.