KiaPartsNow.com offers the wholesale prices for genuine 2019 Kia Optima parts. Parts like Windshield Glass are shipped directly from authorized Kia dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 1.6L - GAMMA, 2.0L - Theta 2, 2.4L - Theta 2. Body: Sedan - 4Door 5P.