2004 Kia Optima Kia Optima 2004

We are 107,000+ car owners sharing real-world car information.

Join Us

2004 Kia Optima repairs by problem area

Engine (55%)

Transmission and Drivetrain (12%)

Brakes and Traction Control (5%)

Suspension and Steering (7%)

Electrical and Air Conditioning (19%)

Paint, Rust, Leaks, Rattles, and Trim (0%)

Other (2%)

Chart based on 42 repairs.
See TSBs and recalls for the 2004 Kia Optima.

2004 Kia Optima repair cost distribution

$2500+ (0%)

$1000 - $2499 (7%)

$500 - $999 (20%)

$100 - $499 (60%)

< $100 (13%)

Chart based on 15 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten 2004 Kia Optima repair histories. Log in or join us to see them all.

2004 Kia Optima

Engine not specified

Kia Optima in Florida, United States
Jul 2010 - Jun 2011
Aug 2010

101000 mi

US $276
the timing belt broke and had to be replaced. 

Return to top

2004 Kia Optima 4dr Sedan

170-horsepower 2.7L V6 4-speed shiftable automatic FWD

Kia Optima in Georgia, United States
May 2009 - Aug 2012
Oct 2010

151000 mi

US $680
Brakes felt weaker and started screeching. New rotors and pads installed. Window regulator went out, the window would roll all the way down, but roll only halfway up. It was the driver's window regulator. 
Jun 2012

175000 mi

US $150
Air was not blowing cold since summer of 2011. Decided to get it fixed. Not sure if there is a slow leak or not. The service rep said that there was no noticeable leak, but they did put in some dye just in case. 
Kia Optima in Ohio, United States
Dec 2007 - Oct 2011
Oct 2007

43000 mi
Air bag light went on. Not sure what the fix was, since the service guy basically couldn't tell me what they did since the actual mechanic had left for the day. 
Kia Optima in Oklahoma, United States
Dec 2010 - Jan 2012
Dec 2011

127000 mi
The airbag light kept coming on then off for several months. Now it is permanent. Am told that is expensive to repair and I am on limited income. Will have to wait a few months. 
Jan 2012

127000 mi
The timing belt shatter (just coming up time for another change) and ruined the engine. Repairs would have cost 4000.00. Just couldn't see spending that much for this old of a car. It is up for salvage sale.  Airbag light on when sold. 
Kia Optima in Colorado, United States
Apr 2009 - Jul 2010
Sep 2009

71000 mi

US $270
Car started to idle rough at stop lights, then began to stall. Problem was Throttle Position Sensor which was replaced. 
Jul 2010

82000 mi
Went on road trip, after driving in 90+ degree weather and through mountains the car stalled out twice, each time on a different day. After letting it cool, the car started up and was fine. Possibly vapor lock. 

Return to top

2004 Kia Optima 4dr Sedan

138-horsepower 2.4L I4 5-speed manual FWD

Kia Optima in Virginia, United States
Dec 2013 - Oct 2014
Dec 2013

135000 mi

US $100
Rough engine. Required motor mounts. Chose not to replace at this time. 
Oct 2014

143000 mi
Timing belt failure. Bent valves in engine. Too expensive for repair. Sold car to someone who can fix it on the cheap. 
Kia Optima in Arizona, United States
Mar 2009 - Dec 2014
Jul 2009

42000 mi

US $72
Slightly squeaking belt. High pressure power steering hose had begun leaking at the joint between the hose and the crimp connector at the PS pump end. The drips were falling on the PS serpentine belt. Took hose to A/C shop and had the end replaced. 
Nov 2011

65000 mi
Finally after 6.5 years and 65,000 miles, the first non-maintenance repair -- a split CV joint boot. Shop spotted a small hole in the other and replaced it, too. Work done under warranty. 
Oct 2012

74000 mi

US $175
Check Engine light, intermittent tach. P0320 error. Traced to failing ignition sensor. Purchased sensor from dealer and replaced myself (2 bolts and a plug). [3rd repair, 2nd not covered by mfg warr, since new. <$250 total. Not bad!] 
Dec 2013

84000 mi

US $250
Replaced ignition amplifier 
Kia Optima in California, United States
Jun 2009 - Sep 2016
Jul 2009

83000 mi

US $800
Clutch pressure plate! I drive 95% freeway miles - hardly any shifting. 
Sep 2010

106000 mi

US $200
Leaking high pressure AC hose. Replaced hose, recharged system. 
Dec 2011

128000 mi

US $60
Crankshaft position sensor failed. Apparently a common occurance with this model. It's behind the timing belt cover which is behind the power steering/AC belt and alternator/water pump belt. Difficult repair, but I did it myself. 
Feb 2014

166000 mi

US $60
Leaking valve cover gasket. 
May 2015

190700 mi

US $50
Cooling system not working properly. Computer is not properly commanding fans. New computer is $1000. Fans are connected to manual switches now, still overheating. Replaced water pump at recent timing belt change. Radiator is next. 
Aug 2015

194700 mi
Replaced radiator, still overheats. Ended up routing windshield washer nozzles to in front of radiator. I give it a few sprays and this cools it right down. Fixed, sort of... Car isn't worth spending any money on so I'm going to live with it. 
Jun 2016

209000 mi
So it turns out this beast isn't overheating at all. Problem is all to do with the ECU. It won't smog now due to this issue so i can't register it w/o spending more than the car is worth. CA will supposedly buy it from me for $1000. 
Sep 2016

209000 mi
ECU issue never fixed. 

Return to top

2004 Kia Optima 4dr Sedan

138-horsepower 2.4L I4 4-speed shiftable automatic FWD

Kia Optima in Texas, United States
Jan 2012 - Jan 2014
Nov 2012

139000 mi

US $65
Engine misfire sensor had been bad, making tachometer inoperative, and illuminating CEL. Sensor replaced, problems corrected. Replaced engine misfire sensor. Bad sensor rendered tachometer inoperative, and lit the CEL. 
Jan 2013

141000 mi

US $80
Battery finally died, was approx. 5 years old, which is a good lifespan in the desert southwest. 
Kia Optima in Washington, United States
Mar 2011 - Nov 2016
Oct 2013

108500 mi

US $1155
Bad crankshaft sensor was causing car to stall. Replaced: crankshaft sensor, balance shaft belt, camshaft seal Valve cover leaking. Replaced spark plug seal and valve cover gasket. Front left CV boot cracked. Replaced left front axle shaft assembly 
Kia Optima in Virginia, United States
Mar 2011 - May 2014
Jun 2011

195000 mi

US $225
MIL, Pre-Converter Temp Low. Replaced pre-converter. 
May 2012

224000 mi

US $395
A/C Compressor failed. Evac system, replace compressor, drier, and expansion valve, recharge system. 
Sep 2012

238000 mi

US $220
Horrible engine vibration. Dealer diagnosed bad ignition coil...quoted $550 to repair. Purchased 2 new coils and new plugs for $170 and self performed repairs. 
Jun 2013

263000 mi

US $150
Replaced Front Struts Replace Driveshafts 
Aug 2013

268000 mi

US $68
Drivers door latch failed closed. Safety issue as the driver's door would not open from the inside or out. Ordered replacement latch (dealer only part) and fixed. Took about 3 days for the part to arrive. 
May 2014

284000 mi
Catastrophic timing belt failure. Engine destroyed. Not worth repairing the car. 
Kia Optima in New York, United States
Jul 2011 - Jun 2012
Jan 2012

106000 mi

US $150
Replaced faulty pulley and replaced belt 
Kia Optima in Texas, United States
Jun 2010 - Dec 2011
Aug 2010

104000 mi

US $700
timing sensor replace 
Jun 2011

113000 mi

US $198
broken power steering hose 
Kia Optima in Ohio, United States
Feb 2013 - Mar 2013
Mar 2013

113000 mi
the brake system keeps locking up 

Return to top

See TrueDelta's information for all Sedans
See TrueDelta's information for all Kia models.

2004 Kia Optima Repair Histories

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2004 Kia Optima problems occur, check out our car reliability stats.