1999 Toyota Tacoma Owners Manual - Page 141
1999 Toyota Tacoma Manual
Page 141 highlights
'99 Tacoma (U) Floor mat Use a floor mat of the correct size. If the floor carpet and floor hole, then it is designed for locking clip. Fix the floor mat clip into the hole in the floor mat have a use with a with locking carpet. CAUTION Make sure the floor mat is properly placed on the floor carpet. If the floor mat slips and interferes with the movement of the pedals during driving, it may cause an accident. 141