Shop Kia Optima by category
Parts that fit your Kia Optima, by department.
Kia Optima
Parts fit 2001 to 2020. Owner reports cover 1996 to 2025, mapped to 1 NHTSA name, so vehicles of very different ages are counted together.
65 of 80 parts name an engine. The other 16 fit any, so choosing one here only narrows those 65.
What owners report
6 of 12 components, the largest by share, together 66.0% of all mentions. 7,461 reports filed with NHTSA from 1996 to 2025, read through 20 name and year queries against 1 source name. A report can name more than one component, so these 7,461 reports carry 9,774 mentions, 1.31 for each report, and every share below is of those 9,774. 840 more mentions were filed as unknown or other and are excluded from both the rows and the total.
What we can sell for it
80 parts from 29 brands fit this vehicle across 7 categories, and parts listed here fit model years 2001 to 2020. Exhaust Systems is the deepest at 59 parts from 8 brands. 4 of the 6 components above map to a category we stock, and the other 2 map to none.
Where the two lists meet
Each row pairs a reported component with the shelf that answers it, deepest complaint first.
Engine is the largest single complaint on this vehicle at 32.0%.
Service Brakes are 5.4% of reports and we stock no parts in Brakes for it.
What the complaints table says
Engine dominates the Optima complaint list, 32.0% of every report filed.
Electrical System is a distant second at 9.5%, with Steering behind that at 7.7%.
These numbers come from NHTSA, the agency owners write to when a vehicle gives them trouble.
Air Bags and Structure tie at 5.7%, and Service Brakes closes the six rows at 5.4%.
A third of complaints landing on Engine doesn't mean your Optima will have engine trouble - it means owners wrote about it more than anything else.
What the parts table says
Exhaust Systems is the deepest shelf here, 59 parts across 8 brands.
Electrical Parts adds another 3 parts, matching a row on the left.
Interior Accessories and Car Accessories sit outside anything owners reported, at 8 and 5 parts.
Engine leads every complaint at 32.0%, yet we stock nothing in Engine Parts for it.