2004 Kia Optima Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 Kia Optima

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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.

Reprogramming the transmission control module with the latest Kia transmission software may fix abnormalities in the automatic transmission and erroneous transmission-related Check Engine Light illumination. Software updates are commonly most effective on newer vehicles. Higher mileage vehicles may exhibit a similar symptom caused by a component failure. However, whenever major transmission repairs are performed the transmission software should be checked and updated as necessary.

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.

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I have good reason to believe this is somehow causing drain my battery as now every couple days I go out to my car and it's completely dead. Only electric though, otherwise the car runs perfect. Taken to a service center and they said they would have to check the wiring but I didn't want ...

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KIA MOTORS CORPORATION (KMC) IS RECALLING 36,538 MODEL YEAR 2001-2004 OPTIMA VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHI...

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I paid off my 2004 Kia Optima Lx...I sure regret not trading this piece of junk in. My problems with this car is once in a while my key won't open my trunk...the whole passenger side of the car front & back the electrical doesn't work ..this pile of junk is a bad car period. Anyone interested in buying a Kia vehicle better think again....

Bought my 2004 Kia Optima LX 4 cylinder in 2008. Had basically NO problems with it at all till 2014. Door locks would occasionally not want to lock or unlock from inside and outside, as well as, with key or door lock buttons. CD player would not always take in CD or would spit it out on it's own. Seem to go through breaks often and gas mileage not what was expected. 2014 - Engine all of a sudde...

I have the 6 cyl model. The car now has 100,000 miles. No troubles yet. The paint on the door handles has come off. No oil leaks, no brake job yet, still runs well.

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