AI Damage2025 KIA K4: common problems
Owners of the 2025 KIA K4 filed 47 complaints with NHTSA, most often about electrical system and powertrain. The maker issued 19 service bulletins for this year. We found 6 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 47
- involving a crash
- 10
- Technical service bulletins (TSB)
- 19
- YouTube repair videos
- 6
What fails most often
- 1 Electrical system 30% of all complaints
- 2 Powertrain 17% of all complaints
- 3 Engine 15% of all complaints
- 4 Air bags 15% of all complaints
- 5 Forward collision avoidance 15% of all complaints
- 6 Lane departure 15% of all complaints
- 7 Steering 11% of all complaints
- 8 Vehicle speed control 9% of all complaints
- Electrical system: 14 complaints (30% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 13.
- Powertrain: 8 complaints (17% of all); manufacturer bulletins for this component: 1.
- Engine: 7 complaints (15% of all); manufacturer bulletins for this component: 2.
- Air bags: 7 complaints (15% of all), 4 of them with a crash reported by the owner.
- Forward collision avoidance: 7 complaints (15% of all), 4 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 1.6 L · petrol · turbo · 4 cyl
- 2 L · petrol · 4 cyl
- automatic, 8-speed
- CVT
Drive: FWD
Symptoms owners describe
How many of the 47 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 14 | 1 | 13 |
| Powertrain | 8 | 0 | 1 |
| Engine | 7 | 0 | 2 |
| Air bags | 7 | 4 | 0 |
| Forward collision avoidance | 7 | 4 | 0 |
| Lane departure | 7 | 3 | 0 |
| Steering | 5 | 2 | 0 |
| Vehicle speed control | 4 | 0 | 0 |
| Backover prevention | 3 | 2 | 1 |
| Fuel/propulsion system | 3 | 1 | 0 |
| Engine and cooling | 2 | 0 | 0 |
| Service brakes | 2 | 0 | 0 |
| Wheels | 2 | 0 | 0 |
| Seats | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
According to the driver, the vehicle unexpectedly steered off the roadway when the Lane Keeping Assist/Lane Centering steering system appeared to intervene. The driver attempted to maintain control but was unable to keep the vehicle on the roadway.
Vehicle's forward collision warnings did not sound. Airbags did not deploy. Vehicle in front end collision at 40mph
I was hit on the driver side of the car infront of the driver door side of the hood and it took out my wheel and the car is totaled with how hard the hit was made my car bounce but the air bags never deployed and the fireman and the police officer said with as hard as I was hit it should have deployed
The exact cause of the steering failure is UNKNOWN at this time. The vehicle and steering components are available for inspection upon request. The loss of steering control put my safety and passengers riding at serious risk because I could not properly control the direction of the vehicle.
The contact stated that while their insured driver was attempting to reverse, the reverse sensor became inoperable with no warning lights illuminated. The contact stated that the reverse sensor failed to function properly. The contact stated that due to the failure, the rear of the vehicle crashed into a barrier.
The 2025 Kia K4 sensors failed to go off resulting in the rear bumper to hit a barrell. The operator of the Kia K4 was reversing at 1mph
Location: Intersection of [XXX] and [XXX] Lakeville, MN Date/Time: [XXX], at approximately [XXX] Vehicle: 2025 Kia K4 (911 call placed at 10:08 am) On [XXX], while traveling toward the roundabout at [XXX] and [XXX], my vehicle experienced a sudden and violent unintended acceleration.
Blind spot and front collision features inactive. Seat belt didn't unlock after crash. Airbags deployed no passenger didn't work on driver airbag b1652 dtc codes on recall for another vehicle
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 899 of 2,102 model years in the NHTSA data (top 43% most complained about).
On average one model year of the K4 has 24 complaints (2 years in the data). This year has 47, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- TECHNICAL SERVICE BULLETIN
BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2515 Revision 1) - 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…
- 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…
- 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…
- TECHNICAL SERVICE BULLETIN
BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2515) - This bulletin provides information regarding the Body Domain Control unit (“BDC”) on certain 2025MY and 2026MY K4 (CL4) vehicles manufactured from May 1, 2025…
- TECHNICAL SERVICE BULLETIN
DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit (DCU) system software on some 2025–2026MY vehicles listed in the table below. Kia has identified that…
- PITSTOP
TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver…
- RELEASE NOTES
OVER-THE-AIR: SERVICE ACTION SOFTWARE UPDATE FOR WARNING LIGHTS (SA621) - This Over-the-Air (OTA) software update is designed to update the Engine Control Unit (ECU) logic of certain 2025 K4 vehicles. This update…
- RELEASE NOTES
OVER-THE-AIR: SERVICE ACTION: SOFTWARE UPDATE FOR RCM (SA620) - This Over-the-Air (OTA) software update is designed to update the Roof Control Module (RCM) of certain 2025 K4 vehicles. This update is designed to…
- TECHNICAL SERVICE BULLETIN
SERVICE ACTION: ECM JUDGEMENT LOGIC IMPROVEMENT FOR DTC P218100 (SA621) - This bulletin provides information to upgrade the Engine Control Module (ECM) system software on certain 2025MY K4 (CL4m) vehicles produced from…
- PITSTOP
TECHNICAL OPERATIONS: DCU IDENTIFICATION AND DAIGNOSTIC AID - This Pitstop provides information on identifying the Data Connectivity Unit (DCU) in Kia vehicles equipped with Connected Car Navigation Cockpit (ccNC) and…
- TECHNICAL SERVICE BULLETIN
BODY DOMAIN CONTROLLER (BDC) REPLACEMENT (CA2507) - This bulletin provides information regarding the Body Domain Control unit (BDC) on certain 2025MY K4 (CL4) vehicles manufactured from June 1, 2024 through May 1…
- TECHNICAL SERVICE BULLETIN
SERVICE ACTION: SUNROOF OPERATION SOFTWARE LOGIC IMPROVEMENT (SA595) - CLOSED AND SUPERSEDED BY ELE390/SA620 - This bulletin provided the procedure to update the Roof Control Module (RCM) software on certain 2025MY K4…
NHTSA lists 19 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
- We Won the 2025 Kia K4 at Copart! Let’s Check It Out! 🚗🔥amount per author: 1,900 UNSPECIFIED_DOLLAR
- 2025 Kia K4 Engine Secrets You Need to Know!
- Replacing the Hood in the SNOW ❄️ | 2025 IAA Kia K4
- Painting Process on a 2025 Kia K4
- 2025 Kia K4 Pad replacement no scanner or special tools
- 2025 kia k4 more issues w brand new vehicle now air bag light
Other years of this model
Questions and answers
What are the most common problems with the 2025 KIA K4?
Owner complaints to NHTSA most often mention: electrical system, powertrain, engine. Total complaints: 47. The most frequent symptoms in complaint texts: warning lights, check engine (19%), driver assists: adaptive cruise, lane keeping (15%), airbags did not deploy (11%).
How many service bulletins (TSB) were issued for the 2025 KIA K4?
NHTSA lists 19 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2025 KIA K4 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2025 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.