Well, desiccant is cheap and motors are expensive. A good rule of thumb is to replace the desiccant when you buy the car and there's no service records of it having already been done. The desiccant gets discolored from heat, so yellowed desiccant means the motor might be running hotter than usual.

 

You can buy the desiccant separately? Any suggested sources?

 

I got mine on Amazon - blue - way more than I need in a lifetime
haha

 

Yup. Amazon. I ended up with orange for my color.