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.
Resources for the Repair and Maintenance of your 2004 Kia Optima
2004 Kia Optima
2004 Kia Optima Problems
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 shoul...
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.
Timing belts can break prematurely and cause serious engine damage. When replacing a broken timing belt, the crankshaft position sensor should also be replaced as it most likely has suffered damage as well.
2004 Kia Optima Recalls (Recent)
Summary: 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, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA. ROAD SALT APPLIED IN THESE STATES DURING THE WINTER MONTHS MAY RESULT IN PROGRESSIVE, INTERNAL CORROSION OF THE FRONT SUBFRAME. OVER TIME, SUCH SUBFRAME CORROSION NEAR THE CONNECTION TO THE LOWER CONTROL ARM CAN LEAD TO WHEEL MISALIGNMENT AND/OR OTHER NOTICEABLE STRESS IN STEERING, OR ACCELERATED ABNORMAL TIRE WEAR.Learn more »
2004 Kia Optima Questions and Answers
no engine lights, kills just idleing, hesitation under load
I do not have the owner's manual for my Optima and do not know what is the best oil weight for my car?
What are people's general opinions about the reliability of the 2004 Optima LX V-6, especially the transmission and engine?
Are the general maintenance and repair costs expensive?
Engine will turn over but car will not start. Not sure where the fuel filter is loacted. Found 3 filters, one in driver rear of car, and one under hood connected to possible fuel line to engine, an...
2004 Kia Optima Reviews
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.
I need to remove alternator . how do I get it out from under the car?
not a bad car just real hard on rotors and pads.
Decent car, a little anemic coming up the hill to my house. If I buy another I'll definately get the six cylinder, not the four.
It does handle well, but you need studded tires in the winter.
I've owned my 2004 Kia Optima LX (4cyl) for a few years now and have put about 45K miles on it). Outstanding car, great value for the money. No major problems on mine, but I am religious about preventative maintenance. With the Optima make sure you replace the timing belt every 50K-60K miles, as they have an 'interference' motor, so if your belt breaks on you, it'll be cheaper to buy an entirely new engine rather than fix your broken one. Experienced one minor annoyance with the car when replacing the headlight bulbs, the clip that holds the bulb in place is very difficult to get at so I actually had to go to my dealer to have the bulbs put in so that was annoying. I have tracked my gas mileage on each and every tank of gas since I bought this car and have averaged 27mpg mixed city and hwy driving. Have been as high as 33mpg on highway driving on long trips. Brakes are not the strongest feature of this car, but they're not necessarily bad either, just average at best. Would definitely recommend this car to someone who is considering buying one, just remember the warning about the timing belt as these units do have a bad reputation for the OEM belts breaking at about 60K miles. So, spend the $400 or so to get a new belt put in as a preventative measure rather than risk a $1K-$2k repair bill to fix one after it's broken.