Application: OPEL ASTRA -COMBO -CORSA -MERIVA -SIGNUM -TIGRA -VECTRA -ZAFIRA -ZAFIRA FAMILY 1.4 -1.6 -1.8                   SAAB 9 -3 1.8 HYUNDAI TERRACAN 2.9 CRDI RANGE ROVER Tensioners are belt tensioners used in automotive drivetrains. The structure tensioner is mainly composed of a fixed casing, a tensioning arm, a wheel body, a torsion spring, a rolling bearing and a spring bushing, etc. It can automatically adjust the tensioning force according to the different tightness of the belt, making the transmission system stable, safe and reliable.