TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM - This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at update.kia.com. The software update may improve system performance, enhance existing features, and apply the latest operating software for supported vehicles (2021-2026MY All Models).
full bulletin at NHTSA ↗2025 Kia EV6 electrical problems
moderate 26 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
26
Recalls
0
Avg fix
$850
What stands out
Owners have filed 26 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.
Of the 4 model years of Kia EV6 we track for electrical problems, this one has the fewest owner complaints on file (26).
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.
TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB preparation process is similar across all supported platforms; however, in‑vehicle installation procedures vary by head unit type.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: SERVICE ACTION: DCU OPERATIONSOFTWARE LOGIC IMPROVEMENT (SA635) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to improve the Data Connectivity Unit (DCU) performance on all 2026MYSportage and Sportage HEV/PHEV and 2025MY EV6 vehicles equipped with Kia Connect Services. The affected vehicles may encounter the following issues: Remote Start/Climate Control function not working, Vehicle Status on the Kia Access App not updating. and/or Connected routing not functioning properly.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: 3 WAY VALVE REPLACEMENT (CA2513) - This bulletin provides instructions for inspecting and replacing the High Voltage Battery Cooling System 3-Way Valve on certain 2025MY EV6 (CV1a) vehicles produced from August 21, 2024, through July 7, 2025, which may display an illuminated Malfunction Indicator Lamp (MIL) and Diagnostic Trouble Code (DTC) U112800 due to a voltage deviation within the 3-Way Valve. There are no drivability issues associated with this condition.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: SERVICE ACTION: DCU OPERATION SOFTWARE LOGIC IMPROVEMENT (SA635) - This bulletin provides information to improve the Data Connectivity Unit (DCU) performance on certain 2026MYSportage and 2025MY EV6 vehicles equipped with Kia Connect Services. The affected vehicles may encounter Remote Start/ Remote Climate Control function not working, Vehicle Status on the Kia Access App not updating, Connected navigation/routing not functioning properly.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The dominant complaint is sudden ICCU failure, typically announced by a loud pop, followed by "Check Electrical System" warnings and severe acceleration loss. The vehicle drops to 20–45 mph limp mode, unable to fully respond to the accelerator. The failed ICCU stops charging the 12V battery, which drains in minutes, causing loss of hazard lights, door locks, and the ability to shift into neutral—a serious hazard if you're on a highway. One owner heard the pop at 70 mph and dropped to 55 mph; another at 55 mph lost power entirely and required a tow. Failures have occurred as early as 3,889 miles and at 4 months old.
Some owners also report the ICCU causing charging system failure—the vehicle refuses to charge at home (Level 2 AC) or at DC fast chargers, and AC charging trips home electrical breakers. One owner said Kia told them 47 ICCU problems were active in Tennessee alone.
Secondary issues include a BMS battery temperature sensor error (P1B9700) that went unaddressed after a week at the dealership, one report of HV fuse failure accompanying ICCU failure, transmission shift refusal, and an unintended acceleration/brake failure incident. There's also a complaint that the NACS charging port doesn't work with Tesla Superchargers despite Kia's advertising.
Repair delays are substantial—ICCU replacements face 2–4 week back orders, and one vehicle sat at the dealer for a full month. One owner received a Kia settlement offer without fault admission and refused to sign.
Same Kia EV6 electrical reports on nearby years: 2022 · 2023 · 2024
Failure modes owners describe
ICCU failure with 12V battery drain
The Integrated Charge Control Unit fails suddenly, typically during normal driving or after charging. The failure causes rapid discharge of the 12V battery, loss of electrical power, and limp mode (severely reduced acceleration). Owners report hearing a loud pop before the warning appears.
When: Various; earliest report at 6 months old (6/28/25 delivery, failure in late 2025); one case at 4 months/7,300 miles; one at 3,889 miles
Symptoms owners cite: Loud pop sound from rear of vehicle; Check Electrical System warning light; 12V battery warning light; Rapid 12V battery drain (one owner saw drop from 12.77V to 11.99V in minutes); Severe power loss and limp mode (speed limited to 20-45 mph); Loss of cruise control, hazard lights, door locking, shift to neutral capability; Vehicle unable to drive or completely immobilized
Codes mentioned: P056216 VCU, C160404 FR_Radar, C28B186 ADAS_DRV, P1A9096, P1A961C
Repairs/costs cited: ICCU replacement; typically on extended back order (2+ weeks reported). One owner had to wait one month for return of vehicle. Software updates reported as part of some repair processes but did not clear codes in at least one case until ICCU was replaced.
Recalls/TSBs owners mention: Kia offered one owner a 'Settlement Agreement and General Release' as a 'goodwill gesture' without accepting fault; owner declined to sign. Limited recalls issued in other countries and on older US model year EV6s per owner research. Kia allegedly told one owner the issue affects 1% of cars (owner disputes this based on online complaints). Another owner reported Kia mentioned 47 current ICCU problems in Tennessee.
Charging system failure (AC and DC)
Vehicle fails to charge properly on both Level 2 AC home charging and DC fast charging. AC charging trips electrical breakers at residence. DC fast charging prematurely terminates after only a few minutes. Cause attributed to ICCU failure by Kia.
When: Reports from late 2025 forward
Symptoms owners cite: Vehicle will not charge on AC (Level 2) home charger; Vehicle will not charge on DC fast charger, session terminates prematurely; AC charging trips residential electrical breaker
Codes mentioned: ICCU failure (diagnostic method not specified by owner)
Repairs/costs cited: ICCU replacement required; parts on extended back order (2+ weeks or greater per owner estimate)
NACS charging port incompatibility
Vehicle advertised as compatible with Tesla Superchargers and home Tesla chargers via NACS port, but will not charge at Tesla Superchargers or with Tesla home charging cords that work with Tesla Model 3.
When: Not specified
Symptoms owners cite: No charging at Tesla Supercharger; No charging at home with Tesla charge cord
Battery management system (BMS) sensor failure
Battery temperature sensor failure triggered BMS error. Dealer did not replace sensor or address other minor electrical defects after one week of vehicle being parked on dealer lot with no communication regarding repair status.
When: Error code generated 11/12/2025; reported to dealer 11/13/2025
Symptoms owners cite: BMS error code P1B9700 (battery temperature sensor); Multiple minor electrical defects (not detailed)
Codes mentioned: P1B9700
Repairs/costs cited: Sensor replacement not yet performed as of complaint filing; vehicle parked at dealer without progress
HV fuse failure
High-voltage fuse failure occurred during routine vehicle operation (reversing in parking lot). Fuse failure accompanied ICCU failure and blew the 12V battery.
When: Not specified
Symptoms owners cite: Pop sound while reversing; Check Electrical System warning; HV fuse failure; 12V battery blown
Repairs/costs cited: HV fuse and 12V battery replacement required; parts on back order
Transmission shift failure
Vehicle unable to shift into Drive or Reverse. Cause not specified in complaint.
When: Not specified
Symptoms owners cite: Transmission will not shift into Drive; Transmission will not shift into Reverse
Unintended acceleration and brake failure
During parking maneuver, vehicle suddenly accelerated and would not stop. Brake pedal ineffective. Owner had to turn off engine to stop vehicle. Vehicle went up curbs and hit a tree.
When: Not specified
Symptoms owners cite: Sudden unintended acceleration; Brake pedal ineffective; Vehicle unable to stop by normal means
Synthesized from 26 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 11 most recent
I was driving on the highway when I heard a pop like a loud fuse sound from the back seat area. Suddenly the car dropped 15 mph from 70 mph to 55 mph and the battery and electrical system warning lights came on and the vehicle said check electrical system. I was able to continue with my hazard lights on to exit the highway, at which point the max speed of the vehicle dropped to 45 mph. It would…
Driving down local (residential) roads, the ICCU died; towed to dealership 12/3/2025. All 12 volt electrical was inoperable. So no hazard lights, no shift to neutral, no locking the doors. It was towed to the dealer. ICCU is now being ordered. The Master Warning light and 12V battery warning light illuminated. I was fortunate to be able to park in a parking lot just before all electrical died.…
On 2025-11-12, my car got BMS error P1B9700. On 2025-11-13, I took the car to local Kia dealer. The error is for battery temperature sensor. After 1 week, thst sensor have not been replaced nor any other numerous minor electrical defects were fixed. My car was just parked in dealer lot the whole time. No communication from Kia or dealer how to fix this potentionly dangerous battery problem.
I was driving over to walk my friends dog and I was pulling into the overflow parking area and my car just speed up and it would not stop. I went up a curb and I hit a small tree went down another curb crossed the street and then up another curb and the break would not stop the car. I finally just cut the car off
While charging at a L3 station, charging was interrupted with a pop (which turned out to be ablown fuse). Two warning lights appeared on the dashboard (battery and vehicle with exclamation points) as well as message to "Check electrical vehicle system". Kia Connect told me to exit the vehicle and that it would need to be towed to the dealer. Dealer Service Office confirmed it was not safe to be…
While driving car began to decelerate and the dash lit up with a number of ABS/Brake system failure symbols. I was on the highway traveling at abt 70 mph when the issue happened. Got car to coast off hwy onto an upward sloping exit. Stopped at a light. Turned off and back on and was able to gain minor speed got approx three blocks to a gas station. Pulled off and tried restarts. The screen…
As I was driving, there was a loud pop that came from the rear of the car. The vehicle immediately flashed a warning to “check electrical systems”. I pulled over as quickly as possible but was faced with reduced acceleration. I ended up stuck in a parking lot awaiting a tow truck for over an hour with my dog and my wife in the car headed to a surgery appointment. The dealership has not confirmed…
ICCU failure at 900 miles
Loud pop and Check Electrical System Message - limited ability to drive due to ICCU no longer charging 12V battery. Car no longer able to drive.
While driving Friday 4/17/26, I heard a pop and the car displayed a message to "Check electric vehicle system." The car seemed to still drive so I drive it home. That evening the car would not charge. I called Jim Shorkey Kia on 4/18/26, where I bought the car, to schedule the car to be looked at. They told me to bring it in on Monday and they will try to squeeze me in so they can diagnose the…
Had electrical trouble with your 2025 Kia EV6?
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 2025 Kia EV6?
It's a documented issue but not catastrophic. 26 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
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/2025/Kia/EV6.
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.