belt tensioner used on BMW E31, E34,E38, 530i,740i ... 1736 724, 11281736724 DAYCO#:APV2043 O.D:70mm width:28mm belt tensioner used on BMW E31, E34,E38, 530i,740i, ... E31 chassis) We can supply more than 700 kinds of belt tensioners and tensioner pulleys for European,American,Japanese and Korean ... offer you OE quality products at the most competitive price. Belt tensioner used on BMW E31, E34,E38, 530i,740i, ...