Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 1998 Kia Sephia owners, lightly cleaned up (personal details are redacted by NHTSA).
While driving 55 MPH, the vehicle stalled. The consumer tried to restart the vehicle but was unable to do so. The consumer noticed smoke coming from underneath the hood. It caught on fire. The fire department was called to extinguish the fire. There were no injuries to report. However, vehicle was totaled. The consumer stated that there was a hard start that would not hold fuel pressure.
I purchased a Kia in March 02' I used the car for long trips the first year I had owned the car and I had no faults in jan.- feb 03' the car began to shift in to numerous gears and then stall. I was then deployed to iraq. I left the car with a good friend. When I came back he informed me that the car wouldn't start. Dealer said it was the fuel pump. Friend replaced the fuel pump.friend then replaced fuel pump again when car wouldn't start. Friend left the car alone,when it didn't start, until I had returned from iraq. I came back and took the car to midas, due to the fact that the dealer didn't have an idea of what was going on. Midas then said it was the fuel pump. I had it replaced for a third time. Car ran for a day then died. I took the car back to midas they said it was the wiring harness. I had that replaced. Car still didn't start. …
I own a 1998 Kia Sephia and ever since I have had this car it sometimes will not start even the battery is working fine. The dealer remedy for this is just replace the starter. I have replaced the starter several times and this seems to provide a cure temporarily. Just recently I had this happen again... I had it towed to a local mechanic that had just again replaced the starter for me...this time he took the starter back to the rebuilder and there was nothing wrong with the starter...the mechanic did some more searching and found the the solenoid that was designed to need a minimum of 11 volts to start was only receiving 7 volts....the mechanic felt the this was a design fault with the car. The starter rebuilder recommended the use of an alternate solenoid from an early model Ford that only required 6 volts....with this fix the car has been starting very well... …
I bought a 1998 Kia Sephia in feb of 2000 I have had to replace 3 gear shifters and three transmissions and the car has only been driven 2/3 of the time that I have owned this car. My signal light on one side has never really worked properly and the the headlight constantly shorts out. Of course now I'm out of warranty and still experiencing these problems and many more I dont know where else to turn because all I'm ever told is that's a Kia for you. I still have a loan of this car and dont think it's right that almost every year the gear shifter and trans need to be replaced. I would great appreciate any help you can give me because I havent been able to drive the car for the last 2 months because the gear shifter wont come out of park and when it did the trans raced when reaching 2 gear. There is no way anyone should experience this much trouble whether being a used car or not. …
While driving vehicle, went to stop & had no brakes. Pulled up on the emergency brake, looked in rearview mirror and noticed smoke all over. Pulled over & got out quickly. Opened paseinger door to get belongings & noticed flames coming from underneath. Called 911. Car was burning tremendously. A total loss. My daughter was driving, and got out safely. This happened for no apparent reason. What a traumatic experience, especially for a 17 yr. Old.
A fire started from main wiring harness under dash which LED to fuse recpticle under hood. Dealer and manufacturer have been notified. When the wiring harness burned, the air bag, the radio, dashboard lights, the cooling fan and the A/C failed. This problem reoccurred several times. Tail light, turn signal, head lights, starter and the alternator also failed as the result of the wiring harness.
I brought a new Kia Sephia in 1998, and had nothing but trouble with it! Transmission was replaced 2 times by the mechanic for Kia motors, and needed to be replaced again on 7/2007. Also , the brakes have been replaced 4 times and need to be replaced again. Now the headlights keep turning off while driving at night, but no mechanic can locate the electrical short problem.
Brakes failed causing accident, they have been replaced 4 times also rotors fuel pump, transmission, glovebox,wiring harness, many other things too... Could have lost my 2 of my grandsons in the accident... Are we going to put up with this??? I can be reached at [email]
In 2 years I had to get a new transmission, replace my brakes 6 times, service engine problems 7 times, fuel pump, 8 recalls, wipers, new tires, and many other problems... Copies of repairs are available upon request. I have also been discriminated against by the dealer many times.
Since the time that I have purchased this car it has been falling apart. The car is constantly shutting down or it just won't start. At this present time my car is sittting at stonemountain Kia whereas it is in need a third battery all within less than a years time. Eventhough they know the dangerous history of this car that I purchased new, they continually return the car to me without doing a safety check. I have had my car towed to their location several times in the same week because they have felled to fix the problem. Once again my car is continually suffering from the same problems that are continuing to grow worst. The air conditioning system fails to work properly. The driveshaft is always sticking in the gears. The air bag light continually blink and stay on for periods at a time. The exhaust still making loud noise that I have complained about since I brought the car. …
NHTSA investigations
Battery cable chafing
Non-crash engine compartment fires
Odi gathered fire data from various sources and inspected subject vehicles to assess the scope and frequency of non-crash engine compartment fires caused by starter cable chafing.odi's analysis found that most of the suspect fires occurred after the vehicle had received service repairs in the area of the subject cable.consumer complaint data indicate that the problem experience has declined since a peak in late…
Electrical complaints in other Sephia years
Frequently asked questions
How common are electrical problems on the 1998 Kia Sephia?
NHTSA has 104 complaints about the electrical system of the 1998 Kia Sephia, 21% of the model year's 491 complaints. The component named most often is ignition (23 mentions).
Is there a recall for 1998 Kia Sephia electrical problems?
No. NHTSA lists no electrical system recall for the 1998 Kia Sephia, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 1998 Kia Sephia electrical problems start?
Half of the complaints with a recorded mileage happened before about 57,000 miles, and 17% before 25,000 miles.
Is it dangerous?
Owners linked 5 crashes, 8 fires and 7 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.