Lexus 2013 GS 350 Owner's Manual page 860

If your name or address
has changed or if you
purchased your Lexus
as a used vehicle, please
complete and mail
the attached card,
even if your warranty
coverage has expired.
This will enable Lexus
to contact you with
important product or
safety updates concerning
your vehicle. If there is no
longer a card attached,
please call the Lexus
Customer Satisfaction
Department at
(800) 255-3987.