There are 1 owner-reported brakes complaints for the 2010 Kia Optimain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
LOUD GRINDING NOISE DEVELOPED IN RIGHT REAR BRAKE. UPON HIS EXAMINATION, MECHANIC FOUND RIGHT REAR BRAKE CALIPER FROZEN IN THE ENGAGED OR CLOSED POSITION. ALSO, LEFT REAR BRAKE CALIPER FOUND TO BE FROZEN IN THE DISENGAGED OR OPEN POSITION. IN ESSENCE, BOTH REAR BRAKES WERE INOPERABLE! WE WERE DRIVING A CAR THAT ONLY HAD FRONT BRAKES FUNCTIONING PROPERLY. OUR MECHANIC COULDN'T REMEMBER A CASE WHERE BOTH REAR BRAKES WERE INOPERABLE ON A CAR. WE BELIEVE THIS PROBLEM TO BE UNACCEPTABLE AND EXTREMELY DANGEROUS ON A VEHICLE WITH ONLY 74,314 MILES AND ONLY 5 YEARS OLD.
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 26, 2026