There are 8 owner-reported powertrain & transmission complaints for the 2001 Kia Optimain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
CAR HESITATED ONCE OR TWICE UPON ACCELERATION, COULD NOT RECREATE PROBLEM. 1 WEEK AGO, WHILE TRYING TO PULL OUT OF THE GARAGE, CAR WOULD NOT GO INTO GEAR. WHEN CAR FINALLY WENT INTO GEAR CAR WOULD NOT MOVE UNLESS ACCELERATOR PEDAL WAS PUSHED TO THE FLOOR, AND EVEN THEN BARELY ANY MOVEMENT. TOOK CAR TO KIA DEALERSHIP, THREE DAYS LATER DEALERSHIP CALLED, THE TRANSMISSION NEEDS TO BE REPLACED. DEALERSHIP SAID IT HAD TO "FIGHT" WITH THE FACTORY REP TO HAVE THE TRANSMISSION COVERED UNDER THE WARRANTY, EVEN THOUGH I PROVIDED PROOF OF MAINTENANCE. DEALERSHIP ORDERED NEW TRANSMISSION, WHEN PREPPING CAR FOR THE NEW TRANSMISSION A "HOLE WAS FOUND IN THE SUBFRAME", THAT IS NOT COVERED UNDER WARRANTY AND THE TRANSMISSION CANNOT BE PUT IN THE CAR WITH THE HOLE IN THE SUBFRAME AT A COST OF $1,800.00. DEALERSHIP CANNOT EXPLAIN HOW A GARAGE KEPT 7 YEAR OLD CAR HAS A HOLE IN THE SUBFRAME. *TR
INPUT AND OUTPUT SPEED SENSOR FAILURE. FAILURE OF SENSORS CAUSE TRANSMISSION TO DROP FROM 4TH GEAR TO 3RD GEAR. FROM THERE TRANSMISSION CAN ONLY SHIFT BETWEEN 2ND AND 3RD GEAR USING "SPORT SHIFT-STICK" . ON A GOOD DAY WITHOUT PROBLEMS ENGINE IS SLUGGISH. VERY SCARY TO DRIVE. *TR
THE AIR BAG LIGHT CAME ON. THE CONSUMER WAS INFORMED IF THE AIR BAG LIGHT WAS ON THE AIR BAGS WOULD NOT DEPLOY. THE CONSUMER EXPERIENCED PROBLEMS WITH THE ELECTRICAL SYSTEM AND THE TRANSMISSION DROPPING TO 3RD GEAR WHEN GOING UPHILL. *LA THE DEALERSHIP TOLD THE CONSUMER THE VEHICLE WAS NOT POWERFUL ENOUGH TO DRIVE UPHILL IN 3RD GEAR. THE DRIVER DOOR LOCK ACTUATOR AND LATCH WAS REPLACED BECAUSE THE DOOR WOULD NOT LOCK OR REMAIN UNLOCK, THE WINDOW MADE A CHATTERING NOISE WHEN IT WAS ROLLED DOWN. *JB
THE VEHICLE WOULD DOWN SHIFT, AND LOOSE POWER WHILE DRIVING, THE ELECTRICAL SYSTEM WOULD OPERATE INTERMITTENTLY. MR THE TRANSMISSION JUMPED OUT OF GEAR. *JG *JB
MY VEHICLE HAS SPENT MORE THAN 35 DAYS IN A KIA AUTHORIZED DEALERSHIP INCLUDING TRANSMISSION REPAIRS SINCE THE DATE OF PURCHASE. I HAVE CARRIED THE VEHICLE TO TWO DIFFERENT DEALERSHIPS MORE THAN SIX TIMES. THE PROBLEMS WITH THE VEHICLE HAVE NOT YET BEEN REPAIRED. I FEEL THAT THIS VEHICLE IS UNSAFE AND A LIABILITY TO OTHERS AND MYSELF WHILE IT IS ON THE ROADS. SOME OF THE OTHER PROBLEMS THAT THE VEHICLE HAS HAD, BUT HAVE BEEN CORRECTED ARE 1. KEYS WOULD NOT OPEN TRUNK 2. DRIVER'S SIDE DOOR WOULD MALFUNCTION AND LOCK ITSELF. MANUAL RELEASE OF THE LOCK COULD ONLY OCCUR FROM OUTSIDE THE VEHICLE, RESULTING IN MYSELF HAVE TO CLIMB OUT THE PASSENGER'S SIDE DOOR TO EXIT THE VEHICLE.
DT: THE FRONT PASSENGER SIDE DOOR WILL NOT UNLOCK FROM THE INSIDE OR THE OUTSIDE. THE KEY DOES NOT ALWAYS WORK. ALSO THE REMOTE IS NOT ABLE TO UNLOCK THE DOORS. THIS PROBLEM FIRST STARTED IN 7-2001. THE CONSUMER TOOK THE VEHICLE TO A DEALERSHIP TO BE REPAIRED AND THEY WERE STILL WAITING FOR THE PART. THERE ALSO WAS A PROBLEM WITH THE TRANSMISSION. THE CONSUMER WAS UNABLE TO GET THE GEARS TO SHIFT SMOOTHLY. THE DEALERSHIP REPLACED THE FRONT SENSOR FOR THE TRANSMISSION THE FIRST TIME. THE DEALERSHIP RECENTLY REPLACED THE REAR SENSOR BECAUSE THE PROBLEM RECURRED. *AK *MR
VEHICLE TRANSMISSION SLIPS WHILE DRIVING.*MR THE AIR CONDITION, AUTO CHECK LIGHT AND AUTOMATIC DOOR LOCKS DO NOT REMAIN UNLOCKED TRAPPING THE DRIVER.*TS *JB
A/C CONDENSATION BUILD UP ON THE INSIDE OF CAR HAD AT DEALER 2 TIMES BEFORE THEY FIXED .#2 REPLACED RIGHT HEADLIGHT 4 TIMES IN1 1/2 YR NO FINGER ON BULBE! #3 AFTER SITTING OVER NIGHT ON FIRST START UP TRANSMISSION WILL NOT MOVE AT FIRST #4 GAS GAUGE FROM DAY 1 WOULDN'T READ FULL AFTER 3 TRIP TO SHOP THEY FIXED IT
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026