belt tensioner used on BMW E31, E34,E38, 530i,740i ... 724, 11281736724 DAYCO#:APV2043 O.D:70mm width:28mm belt tensioner used on BMW E31, E34,E38, 530i,740i,540iOEM ... We can supply more than 700 kinds of belt tensioners and tensioner pulleys for European,American,Japanese and Korean cars or trucks ... OE quality products at the most competitive price. Belt tensioner used on BMW E31, E34,E38, 530i,740i,540i ...