I just read on the Lexus website;
AAA Information for Lexus Owners
The AAA For Lexus Owners Plan picks up where your current Lexus coverage leaves off, allowing you to enjoy the same roadside protection you've grown accustomed to—and more. Current Lexus owners can find additional information on this plan in the Owners Only section of this site.

At the request of Lexus, AAA has agreed to waive its customer enrollment fee for current Lexus owners, allowing them to join for the same dues as a renewing member would. To take advantage of this offer, contact the AAA For Lexus Owners membership line at 1-877-222-8785

What is different or special to a Lexus owner?