I HAVE A 2010 CREWMAX WITH 79K MILES. DURING A RECENT VISIT TO A LOCAL BODY SHOP THEY NOTICED THAT THE BED OF THE TRUCK WAS RUSTING IN FOUR SEPARATE PLACES WHERE THE CROSS MEMBERS ATTACH TO THE FRAME. A TSB WAS ISSUED, OBVIOUSLY A KNOWN ISSUE FROM TOYOTA, BUT I NEVER RECEIVED VIA MAIL. THE TRUCK WAS SERVICED AT LOCAL DEALERSHIP BUT THIS ISSUE WAS NEVER CHECKED. IT HAS A FACTORY INSTALLED TOYOTA BEDLINER. WHEN PURCHASED, I HAD THE UNDERCOATING APPLIED WITH THE EXPECTATION THAT THIS WOULD PREVENT THE RUSTING. HOWEVER, SINCE THE RUST BEGINS FROM THE BOTTOM IT IS NOT EASILY IDENTIFIED. I HAVE SPOKEN WITH BOTH THE DEALERSHIP AND MADE A PHONE CALL TO TOYOTA CORP TO NO AVAIL. THE DEALERSHIP CLAIMS NO RESPONSIBILITY AND CORPORATE IS STANDING FIRM ON THE 5 YEAR WARRANTY. VERY DISHEARTENING TO SPEND THAT AMOUNT OF MONEY ON A TRUCK THAT HAS A KNOWN ISSUE AND THE COMPANY WILL NOT BACK IT UP. I AM FOND OF THE VEHICLE BUT IF IT IS REMEDIED I WILL NOT RECOMMEND NOR PURCHASE ANOTHER TOYOTA FOR MYSELF OR MY FAMILY.