▁State ▁Farm ▁ins urance ▁revealed ▁that ▁it ▁had ▁war ned ▁N HT SA ▁in ▁late ▁ 2 0 0 7 ▁on ▁an ▁increased ▁tr end ▁of ▁Toy ota ▁acc idents ▁related ▁to ▁the ▁re called ▁models ; ▁other ▁ins ur ers ▁stated ▁however ▁that ▁they ▁had ▁not ▁seen ▁such ▁a ▁tr end . ▁On ▁June ▁ 1 , ▁ 2 0 1 0 , ▁the ▁N HT SA ▁opened ▁an ▁investigation ▁into ▁reports ▁that ▁floor ▁m ats ▁were ▁jam ming ▁acceler ators ▁in ▁Ford ▁F usion ▁and ▁Mercur y ▁Milan ▁sed ans . ▁On ▁June ▁ 3 0 , ▁ 2 0 1 0 , ▁N HT SA ▁reported ▁on ▁its ▁latest ▁broad ▁study ▁of ▁un int ended ▁acceleration ▁on ▁all ▁car ▁makes , ▁including ▁Toy ota , ▁in ▁conj unction ▁with ▁NASA ▁and ▁the ▁National ▁Academy ▁of ▁Sciences . ▁N HT SA ▁stated ▁that ▁it ▁was ▁unable ▁to ▁find ▁electronic ▁thro tt le ▁defect s , ▁but ▁identified ▁floor ▁mat ▁ent rap ment ▁and ▁ped als ▁that ▁were ▁slow ▁to ▁return ▁to ▁idle ▁as ▁two ▁causes ▁of ▁Toy ota ▁compla ints . ▁N HT SA ▁also ▁stated ▁it ▁could ▁only ▁verify ▁one ▁Toy ota ▁un int ended ▁acceleration ▁accident ▁caused ▁by ▁a ▁vehicle ▁defect . ▁On ▁July ▁ 1 4 , ▁ 2 0 1 0 , ▁the ▁Wall ▁Street ▁Journal ▁reported ▁that ▁N HT SA ▁investig ations ▁of ▁ 7 5 ▁acc idents ▁alleg ed ▁to ▁sudden ▁acceleration ▁in ▁Toy ota ▁vehicles ▁had ▁found ▁driver ▁error ▁as ▁the ▁primary ▁cause ▁in