2006 Kia Optima Problems

What owners report

Owners of this model year most often describe warning lights that come on and stay on, mainly for the air bag system, and door locks that will not release from the inside or outside. Many reports concern the driver's door becoming difficult or impossible to open, and several owners say dealers declined repairs as out of warranty. Engine stalls, stalling-related sensor replacements and flickering or repeated exterior bulb failures also appear, generally at moderate mileage.

1. 1
   Air bags

   Air bag warning light stays on

   • 40 complaints (26%)
   • median 67,500 mi at 4.4 yrs old (30 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2006–2018

   Owners describe the air bag warning light coming on and staying lit, sometimes intermittently and sometimes after the passenger seat is moved. Complaints mention dealers resetting the light, replacing wiring or a seat-back component, or telling owners the vehicle was outside warranty or not covered by a recall by VIN. A few owners report the light appeared before a crash in which the air bag did not deploy, or that it deployed unexpectedly at low speed. Reported from very low mileage up to roughly 152,000 miles, with many between 43,000 and 115,000 miles.

   Recall 12V0140004 related service bulletins

   What to check: Turn the key to on and confirm the air bag light goes out after the self-check; ask whether the clock spring recall 12V014000 was performed for this VIN. Also check whether the passenger occupant sensor mat warranty extension applies.

   2 excerpts from owner complaints in NHTSA records

   “My airbag light came on a few months ago when I was driving to work the light came on and have not gone off yet. I took it to get a diagnose and was told it was a sensor in the seat and I should have it replaced. Well I had someone put in a different seat and the airbag light did not go off. Now it's time for my inspections and I can't even get it done because the airbag light is still on.”

   NHTSA complaint #10871474, filed 2016-05, 115,075 miles

   “I purchased my 2006.5 Kia Optima on november 6, 2014. Before my test drive the air bag light illuminated but then turned off, I said something to the dealership (not a Kia dealer) and they diagnosed it and told me it was the airbag module and that they would order a new one and replace it free of charge. …”

   NHTSA complaint #10694729, filed 2015-03, 122,000 miles
2. 2
   Latches, locks and linkages

   Driver's door will not unlock or open

   • 30 complaints (19%)
   • median 77,000 mi at 5.9 yrs old (27 state mileage)
   • filed 2009–2019

   Owners report that once the doors are locked, the driver's door often will not reopen with the key fob, the inside unlock button or the key, forcing entry or exit through the passenger side. Several say the door opens only partway before relocking, and some describe the dealer identifying a small plastic door checker or latch as the part involved. Complaints frequently note the dealer declined the repair as out of warranty or could not reproduce the problem. Mostly reported between about 35,000 and 130,000 miles; a few at higher mileage.

   1 related service bulletin

   What to check: With the car locked, try opening the driver's door from inside and outside with the fob and the key; ask whether the latch or door checker has been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Keyless entry on driverside only locked me in and out of the car. Lock will only open 1/2 of the way. Airbag light came on and will not go off. I can not get an inspection. They say the system is unstable. Transmission has slipped a couple of times.”

   NHTSA complaint #10556193, filed 2013-12, 80,000 miles

   “I was trapped inside the car when the drivers door would not open by activating the inside door handle, the inside door unlock lever or the remote key fob. When I used the door handle nothing happened. When I pressed the inside door unlock lever I could hear the power unlock mechanism activate but the door would not open. Nor would the door open when the remote key fob unlock was pressed even though I could hear the unlock mechanism activate. The door latch would not release and allow the door to open. …”

   NHTSA complaint #10496947, filed 2013-02, 61,300 miles
3. 3
   Exterior lighting

   Headlights and bulbs failing or poorly aimed

   • 16 complaints (10%)
   • median 3,650 mi at 1.5 yrs old (10 state mileage)
   • filed 2006–2020

   Owners describe headlights aimed too low to see far ahead, a dark shadow cast by one headlight, and repeated replacement of headlight, tail light and brake light bulbs. Some reports link flickering dash and exterior lights to a switch or wiring problem, and one owner describes brake lights staying on. Reported from near-new mileage (under 4,000 miles) up to about 105,000 miles.

   2 related service bulletins

   What to check: Check both headlight patterns on a dark road, confirm every exterior bulb works including brake and turn signals, and ask how often bulbs have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “We bought our Kia with less then 10 miles on it, right off the show room floor, we have had to replace passenger side headlamps (total to date 5/15/2015) 15 times, both rear turn signals bulbs and rear brake lights. The air bag light would appear on the dashboard when ever the passenger seat would be moved and now the air bag light on the dashboard flickered driving home from work last night and remands on.”

   NHTSA complaint #10588564, filed 2014-05, 500 miles

   “I have a 2006.5 Kia Optima. I am experiencing the same problem with the brake light switch sticking as other kias currently under recall. My brake lights are always on. Am I out of luck on this one?”

   NHTSA complaint #11374127, filed 2020-11, 105,000 miles
4. 4
   Air bags

   Engine stalls or shuts off while driving

   • 16 complaints (10%)
   • median 11,874 mi at 4.2 yrs old (15 state mileage)
   • 1 mention a crash, fire or injury
   • filed 2006–2018

   Owners describe the engine running rough and stalling, sometimes at speed on a highway with no warning lights, and sometimes repeatedly after restarting. Complaints mention crankshaft position sensor and harness replacements, along with diagnostics that did not resolve the stalling. Some also report the engine locking up or losing power shortly after an oil change. Reported from a few thousand miles up into the 100,000-plus mile range, across all seasons.

   What to check: Ask for service records showing whether the crankshaft position sensor or wiring has been replaced, and note during a test drive whether the idle is steady and whether the engine cuts out when warm.

   2 excerpts from owner complaints in NHTSA records

   “My 2006 Kia Optima just stopped running yesterday, without any warning, in the middle of a high traffic street. It completely lost power and there was nothing I could do. Since there was no warning (check engine light not on, no stuttering, etc.), I wasn't able to get to the side of the road. The car behind me had to swerve to not hit me. I'm a 67 year old, disabled woman who was stuck on the side of that busy street for a half an hour until my car could be towed. …”

   NHTSA complaint #10396149, filed 2011-04, 61,787 miles

   “My car stalled while driving then all sudden it stalled, I started again then stalled again. I called the tow truck and towed to the auto repair, my car has a vehicle recalls. The dealerships refused to fixed it the recalls, they told me I have to pay full costs about $5,000 for new engine. They won't fixed the recalls. I found out there was huge complaints against dealerships of Kia . I filed a lawsuits against the dealerships for refused to fix my car. 2 recalls air bags/engine. …”

   NHTSA complaint #10649826, filed 2014-10, 108,386 miles
5. 5
   Visibility (wipers, defrost, mirrors)

   Sun visor drops and blocks the view

   • 9 complaints (6%)
   • median 54,600 mi at 4.6 yrs old (8 state mileage, few)
   • filed 2010–2012

   Owners report the driver or passenger sun visor will no longer stay in the raised position and hangs down, obstructing forward or side vision. Complaints describe repeat replacements, some under warranty and later at the owner's expense, and note that passengers bump the visor when getting in or out. Mostly reported between about 20,000 and 92,000 miles, often within a few years of purchase.

   What to check: Raise and lower both visors and confirm they stay up on their own; ask whether either has already been replaced.

   2 excerpts from owner complaints in NHTSA records

   “On my 2006.5 Kia Optima, on three separate occasions my sun visor mechanisms have broken internally, and would no longer remain in the up position, which has been a safety concern for me the passenger sun visor has broken at least once, and the driver side has broken at least twice. The first 2 times, the sun visor was replaced entirely under warranty. However, on the 3rd time, I was out of warranty and had to purchase and install a new one myself. …”

   NHTSA complaint #10424453, filed 2011-09, 20,000 miles

   “The sun visor does not stay up. The sun visor on the driver side is vision impairment. The switch for the both seats does not work. The wheel bearing is bad. The tire pressure wheel sensor and the transmission speed adjustment sensor are bad on this 2006 Kia Optima , constantly bulbs for taillight blow.”

   NHTSA complaint #10347956, filed 2010-08, 64,200 miles

Buying note. An air bag warning light and a driver's door that will not release are the two things to check first on this model year, since both are widely reported. Ask for records of recall work and any air bag, latch or crankshaft sensor repairs before buying, and budget for continuing bulb and visor replacements.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.