2004 Kia Optima Repair and Maintenance

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

2004 Kia Optima Problems

Door 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.

Faulty Throttle Position Switch

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.

Kia Issues New Alternator to Replace Weak One

After the vehicle has been operated with electrical loads (lights, air conditioning), a weak alternator can cause starting difficulties. In some cases, the original alternator could not sufficiently charge the battery; Kia released a new alternator which can correct this concern.

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2004 Kia Optima Questions

Hi, I just got a 2004 Kia Optima about a month ago and I have noticed recently that when I'm stopped at a light or stop sign once I accelerate I hear a "clunk". (2 answers)

I believe it's coming from the driver side front under the car. It only does it once and I can feel it in the floorboard. It will be louder if I'm on an uphill stopped and then accelerate. I had to get the control arm in the front replaced and I put 4 new tires on it about 2 weeks ago. Pl...

Car shakes uncontrollably when it is put in great. (1 answer)

Is the knock sensor a common problem and where is it located on the motor? Will it cause a cyl. Misfire? (1 answer)

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2004 Kia Optima Recalls

Recall 09V183000
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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2004 Kia Optima Reviews

I got stuck buying from Dons used cars. He is a buy here pay here dealer. It is a 2004 Kia Optima and i was in a rush as they just done detailing the vehicle. So after i got the car home and checked KBB i found out he was charging me 4K over the book value! $7K for a vehicle with 166K miles on it! And its starting to break down! I put 4 new tires on it and that's all im going to ...
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 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....

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