TSB - USE OF AFTERMARKET USB CHARGING CABLES IN USB/12V PORTS - This article provides information regarding the use of USB ports and 12V power outlets to connect/charge mobile phones. Customers may experience issues with their head units that may be related to the use of aftermarket USB charging cables, including; * Electrical interference and limited or no functionality when attempting to play music, or when charging a device through the USB port * Excessive static or noise when listening to the audio source * Malfunctions and screen freeze of the head unit screen * Slow down of the system response while device is plugged in * Music will not play from iPhone 5 or 6 with Kia iPod cable and a
full bulletin at NHTSA ↗2005 Kia Optima electrical problems
severe 29 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
29
Recalls
0
Avg fix
$850
1fire
1injury
When does it fail?
Of the 29 electrical complaints filed for the 2005 Kia Optima, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 29 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Electrical accounts for 20% of all owner complaints filed against this vehicle, across 6 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
KIA: ECM UPGRADE-DTC P0130 AND P0150 ON 2.7L ENGINE EQUIPPED. PROVIDES INFORMATION RELATED TO A ECM SOFTWARE UPGRADE OF SOME MODEL YEAR 2005-2006 VEHICLES EQUIPPED WITH 2.7L ENGINES WHICH MAY EXPERIENCE A MALFUNCTION INDICATOR LAMP ILLUMINATED WITH ECM (ELECTRONIC CONTROL MODULE) SYSTEM RELATED DTCS.
full bulletin at NHTSA ↗KIA: ECM UPGRADE WITH TP SENSOR REPLACEMENT-MIL ON WITH DTC P2135/P0638. INFORMATION RELATED TO ECM SOFTWARE AND TP SENSOR UPGRADE ON SOME VEHICLES WITH 2.7L ENGINES WHICH MAY EXPERIENCE A MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH THE ELECTRONIC THROTTLE CONTROL (ETC) SYSTEM RELATED DTC P2135 OR P0638 OR P2A00 OR P2A03.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2005 Kia Optima's door locks are the main complaint across these 29 reports. The driver-side door lock fails most often—it locks and refuses to unlock from either inside or outside, trapping owners in the vehicle. Some locks cycle (unlock, then immediately lock again). Owners report clicking or grinding sounds as the mechanism tries to work. Several owners with small children or medical conditions (one had a recent C-section, another is disabled) describe having to crawl over center consoles or escape through passenger doors. At least one owner became trapped when retrieving a child from traffic. Repair costs run $400–$450 for door latch replacement. A recall on these latches exists for 2003–2006 Kia Optimas, yet dealers initially denied knowing about it.
Light bulb failures are a close second. Both low-beam headlights blow out simultaneously and regularly. High beams work only sporadically. Taillights fail about once a month by one owner's account. Dealers say "they burn out" but one owner's research suggests the vehicle's charging system is overcharging and destroying bulbs prematurely.
Owners also report intermittent electrical faults: power windows stick or operate on their own, trunks pop open without input, airbag warning lights stay on (one dealer blamed seat weight sensors disconnecting), seat belt retractors fail, and keyless remotes stop working within a year of reprogramming. One owner found aftermarket lights someone had installed created a fire hazard under the dashboard.
Same Kia Optima electrical reports on nearby years: 2006 · 2008
Failure modes owners describe
Driver-side door lock failure
Driver-side door locks and refuses to unlock, leaving the door inoperable from inside and outside. The locking mechanism either stays locked permanently or cycles (locks again immediately after being unlocked). Owners report hearing clicking or grinding sounds as the mechanism attempts to work. Multiple owners became trapped in the vehicle and had to exit via the passenger side.
When: Various mileages; one report at 82,000 miles
Symptoms owners cite: Door will not unlock from inside or outside; Loud clicking or grinding noises when attempting to operate lock; Lock mechanism attempts to function but fails to complete; Door locks automatically when handle is pulled from outside; Key does not turn fully in external lock cylinder; Owner becomes trapped in vehicle
Repairs/costs cited: Door latch assembly replacement; costs cited: $400–$450 per door. One dealer indicated repair was not covered under warranty even for vehicles with known recalls.
Recalls/TSBs owners mention: Recall on KIA door lock mechanisms (model years 2003–2006 referenced in one complaint). Multiple owners state KIA dealerships initially denied this was a common problem despite widespread internet complaints and multiple NHTSA reports.
Passenger-side door lock failure
Passenger-side door locks fail and cannot be opened from inside or outside. Owners report the lock sticking and refusing to operate. One case mentions both driver and passenger doors locking after one initially failed.
Symptoms owners cite: Door will not unlock from inside or outside; Lock starts sticking before complete failure; Cannot be opened even when other doors are unlocked
Repairs/costs cited: Dealer unable to repair or open door in at least one case.
Headlight and taillight bulb failures
Both low-beam headlights blow out simultaneously and frequently. High beams work only sporadically. Taillights also fail regularly. Owner suspects chronic overcharging by the vehicle's electrical system. Dealer replaced battery but did not address root electrical cause.
Symptoms owners cite: Both low-beam headlights fail at the same time; High beams only work intermittently (on/off cycling does not reliably restore function); Taillights burn out regularly (one owner reports replacement about once per month); Owner frequently pulled over by police for burned-out lights
Repairs/costs cited: Dealer replaced battery; owner believes this was a band-aid and the real issue is defective vehicle charging system.
Recalls/TSBs owners mention: Dealer stated 'It happens, they burn out' and attributed problem to bulbs rather than electrical system. Similar complaints noted on Kia and Hyundai vehicles across multiple model years.
Keyless remote failure
Both keyless remotes stop working. Owner had remotes re-programmed 12 months before failure; one remote failed 6 months after re-programming, the other 12 months later. Owner believes the defect is systemic to 2003–2006 Kia Optimas.
When: 6–12 months after re-programming
Symptoms owners cite: Keyless remote stops responding; Requires re-programming, which provides only temporary functionality; Recurring failure in multiple remotes on same vehicle
Repairs/costs cited: Repair cost estimated at $400; not covered outside warranty.
Recalls/TSBs owners mention: No formal recall issued. Kia dealership confirmed the defect appears common to 2003–2006 Kia Optimas.
Airbag warning light and passenger airbag deployment failure
Airbag warning light comes on repeatedly and will not turn off. One owner reports the passenger-side airbag will not deploy. Dealer told one owner that the light comes on anytime a person of sufficient weight sits on the seat and causes the connector to disconnect.
When: Recurring; one case reported again after one prior repair
Symptoms owners cite: Airbag warning light illuminated; Airbag light returns after repair; Passenger-side airbag will not deploy; Frequent disconnection of seat weight sensor
Repairs/costs cited: One repair completed but light returned. Dealer indicated recurrent disconnection of connector due to weight of occupant.
Recalls/TSBs owners mention: Kia dealership advised owner this is normal behavior ('anytime anyone with any weight sits down on the seat it will come disconnected').
Intermittent electrical failures (power windows, trunk, seat belt retractor)
Various electrical components fail intermittently and then function normally without repair. Power windows stick part open and do not respond to switch input, then lower/raise on their own. Trunk suddenly pops open without input. Seat belt does not retract consistently.
Symptoms owners cite: Power window sticks in part-open position; Power window switch does not respond; Window then operates without switch input; Trunk pops open spontaneously; Seat belt does not retract all the time
Smoke from dashboard / aftermarket electrical fire hazard
Thick smoke coming from under the dashboard while air conditioner was running. Investigation revealed previous owner had installed aftermarket floorboard lights requiring massive power draw. Taillights were inoperable. Dealer stated the cigarette lighter could be the cause but took no action because vehicle was out of warranty.
When: Under 77,000 miles
Symptoms owners cite: Thick smoke coming from under dashboard; Smoke visible while operating air conditioner; Taillights inoperable; Aftermarket electrical devices consuming excessive power
Repairs/costs cited: Dealer blamed cigarette lighter as possible cause; no repair performed.
Recalls/TSBs owners mention: Dealer stated nothing could be done because vehicle was out of warranty.
Synthesized from 29 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
Locked car after buying it used drivers door will not unlock. Multiple complaints online about this problem. My daughter was going to drive this thing. Kia dealer did not even mention this to me, but did say it was 200 minimum. I hope this gets investigated. In an accident the door will never open. I drove the car home and after 2 hours it will not unlock.
Needed to replace door latch on driver's side. Door would not open from the inside. Air bag on passenger side will not deploy. *tr
The driver side door will not unlock from the inside or outside. I can hear the assembly trying to work, the key will unlock the other doors. This is a huge safety issue in an emergency. I called the Kia dealership in newport richey fl and they told me this a common problem with this vehicle. How many people are going to possibly lose their life in an accident,because of this defect before…
I believe this problem should be a recall. This is a safety issue and needs to be corrected by the manufacturer. We had the same problem where the driver door would not open no matter what you did,. It wouldn't open from the inside or the outside. All the other doors would open, but the driver door. If you opened it with the key it clicked, but when you pulled the handle to open the door it would…
I became entrapped in my 2005 Kia optima when I accidentally hit the lock. Its been an issue before. While its dangerous to keep it unlocked, I chose that over being locked out or being locked in. Last night my elbow hit the lock as I parked. I had my coworker come pull the handle while I pushed the unlock button. While it has worked after several tries in the past, it just wouldn't give in. I…
Driver's side door would not open. You could click it and it would sound like it was going to open, but it didn't. Had to drive to a Kia store and have the whole assembly replaced at the tune of $450. Interestingly enough, they did not seem to think this was a common problem, but I can see there are hundreds of complaints about this problem. I had my two year old grandson in the back seat and…
Passenger side door no longer opens. This is a safety issue. Driver must enter and exit vehicle from passenger side. This is dangerous. Kia dealership was not able to open the door or fix the problem... *tr
Had electrical trouble with your 2005 Kia Optima?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2005 Kia Optima?
It's a meaningful issue. 29 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 25 complaints that reported odometer mileage, most electrical failures cluster between 80,000 and 130,000 miles, with the median around 99,000. A quarter of owners report trouble before 80,000; a quarter make it past 130,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Kia/Optima.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.