If the air conditioning system in your fourth generation (2016, 2017, 2018, 2019 & 2020) Kia Optima hasn’t been working well recently or the air coming out of the vents smells a bit musty or moldy, you probably need to clean or change the A/C cabin air filter element in the HVAC blower motor housing. Check out my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2016-2020 Kia Optima A/C Cabin Air Filter Replacement Guide
