You need to change the A/C receiver drier if you have a leak in or do repairs on your vehicle air conditioner system. We'll show you how to change the receiver drier on a Toyota Sienna. The receiver drier contains a material, called "desiccant," that's used to absorb moisture that gets into the air conditioner system. Moisture in your A/C system is bad news, so you want to replace the receiver drier whenever you have a leak in or do repairs on your vehicle A/C system.

Note: I use standard PAG 46 refrigerant oil that doesn't have dye or enhancers in it. You don't need dyes or enhancers. You can buy the PAG 46 at a local auto parts store.