The phrase "rear step" refers to the back part of something where you can put your foot to support yourself or get onto a higher surface. Full definition
SR5 PKG W / COLOR - KEY PKG - inc: deluxe ETR AM / FM stereo w / cassette / compact disc color - keyed front bumper chrome rear step bumper color - keyed grille / valence panel pwr steering sliding rear window privacy glass passenger visor vanity mirror air cond (charlestonhonda.com)
TOYOTA CERTIFIED, 4WD, BLUE TOOTH, SIRIUS XM, VEHICLE DETAILED, TRD OFF - ROAD PACKAGE, ACTIVE TRACTION CONTROL, 8 AIR BAGS, RUNNING BOARDS, Tundra SR5, 4D CrewMax, 5.7 L 8 - Cylinder SMPI DOHC, 6 - Speed Automatic Electronic with Overdrive, Black, 18» x 8J Styled Steel Wheels, 6 Speakers, Exterior Parking Camera Rear, Front fog lights, Heated door mirrors, MP3 decoder, Power door mirrors, Rear step bump (shoppok.com)