Originally Posted by
GraphiteGhost

I did find this section in my 08 manual, It is in Volume 3, in the ORVR system, section 25, page 24 onwards. The prior year manuals might have a page or two different but just check that section 25.
.
Thank you. I looked it up and it mentions that the EVAP charcoal canister is "Maintenance Free". I guess we can assume lifetime? Diamonds and charcoal are forever.