I realize this thread is (in theory, at least) only for posting good AWD codes and associated information. But I would like to bring up this issue: what if you get a different result from booking on a website or app (say, Costco Travel) than you do booking on Avis website or app with the associated AWD code?

On the Avis app/website, I tried all four Costco AWD codes I found on this thread or elsewhere (A108303, A108325, A108326, A108335) and entered my Costco membership number as requested each time. With a given set of rental parameters, I got identical results from all four: about $624 estimated total (incl. taxes/fees, with no extras or add-ons).

I logged into Costco Travel, and using the exact same rental parameters, got an estimated total of about $552. (And it isn't just a momentary glitch: I've seen this phenomenon repeatedly.)

Am I missing something? Is there a coupon code I should have entered on the Avis app/website, in addition to the AWD?

Anyhow, unless there is a simple explanation for the discrepancy, it might be a good idea to try booking on Costco Travel rather than always relying on the Avis app/website, if Costco is the discount you are seeking.