Genuine OEM Kia 1st Gear Sleeve, part number 432532B000. This essential component is located within the manual transaxle, where it functions to connect and engage the 1st gear with other transmission gears. It plays a crucial role in the smooth and efficient transfer of power during gear shifts. Choosing a genuine OEM gear sleeve ensures the correct internal and external splines, material hardness, and precise dimensions for optimal engagement and long-term durability within the transmission.