2004 Kia Optima Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Kia Optima
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2004 Kia Optima ProblemsDoor Locks Malfunction Not Allowing Driver or Passanger to Open Their Doors
A faulty door latch assembly may cause one or both front doors to be difficult to open. Replacing the worn latch will commonly correct this problem.
Check Engine Light illumination—combined with a lack of power or a stumble on acceleration—may be caused by the throttle position switch (TPS). Kia released an improved part which should correct this concern.
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.
2004 Kia Optima QuestionsIs the knock sensor a common problem and where is it located on the motor? Will it cause a cyl. Misfire? (1 answer)
This is the first time something like this has ever happened.