Question about 2003 Kia Optima

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I have a 2009 Kia Optima and my brakes light don't work.

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Brake light signal switch or associated fused/ relay.
This new, take it to the Dealer under warranty.
Regards,DT

Posted on May 10, 2010

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Posted on Jan 02, 2017

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Have a metal banging noise in rear..Kia Optima 2009


Have the car put on a lift and check for broken suspension parts.

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2005 kia optima abs& brake light ON


Try the master cylinder if that's not it try the brake booster, but first bleed all the brake lines starting with the driver rear then move forward if no pedal then proceed to master and booster

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Brake lights do not work in a Kia Optima- every other lights work.


check fuse and or the bulbs,if both dont work it is possibly fuse or the brake switch on brake pedal

Jan 21, 2011 | 2007 Kia Optima

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Brake light not working on Kia 2005 Optima tali lights work, bulbs replaced brake light switch replaced but still no brake lights


Check the space gap between the brake lever to the brake switch.

Also check the connector to the brake switch.

You have to look under the dash carefully.

These is not too much room under there.

Just ran you hand along the brake paddle.

Press the brake switch by hand and see is brake light go on.

Check all connectors for corrosion.


Apr 24, 2010 | 2004 Kia Optima

2 Answers

2004 kia optima,break lights stay on,taillights will not come on,bulbs are ok


It sounds as if your brake light switch is bad, or, your brake pedal return spring isn't pulling the pedal back towards the seat.

First, just pull up on the brake pedal, opposite direction of when you are applying them & see if the lights go off. If yes, you'll need a new return spring. If not, then usually the switch mounted up above the pedal is defective & needs to be replaced.

I believe once that is corrected, the lights should work properly if your parking lights are working, as they both use the same circuit. If not, you'll have to do some testing of those wires & backtrack to the light switch.

The Brake light switch also can have the cruise control switch & other controls associated with it but not always, depending on the specific Model & Year & other options so testing it could require a wiring diagram, I've included a link that will give you the wiring colors for the brake light switch itself. Testing the wiring is the only way to determine any other condition that would be causing that to happen.

Here's the link for the wiring:
http://www.commandocaralarms.com/wiring/2003-2005/Kia/Optima/893.html

It shows the brake switch wires as GREEN.
Good Luck.

Feb 08, 2010 | 2004 Kia Optima

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2004 Kia Optima EX...Brake lights suddenly don't work. Fuses are all ok...bulbs are all ok...and the switch box that's under the steering wheel is also in working order. Where else can I check for the...


You can check to make sure that the taillights have a good ground. If at all possible try using a test light or multimeter at the light. Have someone step on the brake and see if you have positive voltage to the light. If you do then it could be a faulty ground. If you don't move closer to the brake switch or even test the brake switch.

Nov 06, 2009 | 2004 Kia Optima

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