Where is transmission filter located on 2004 Kia Optima?

The transmission filter on a 2004 Kia Optima is located inside the transmission pan. To access it, you typically need to remove the transmission pan by draining the Transmission Fluid and unbolting the pan from the transmission housing. Once the pan is removed, you'll find the filter attached to the transmission body, which can then be replaced. Always consult the vehicle's service manual for specific instructions and safety precautions.