The timing chain tensioner is vital to maintaining not only proper timing, but the life of the chain itself. Generally these will need to be replaced before the chain itself goes bad. Be sure to change yours at the proper intervals to avoid failure.
Genuine BMW Chain Tensioner And Guide Rail - This item fits the following BMW Chassis: E70 X5,E71,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4,F30,F32,F33,F34,F36,F80 M3,F82 M4,F83
