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      11-18-2012, 07:20 AM   #6
Efthreeoh
Brigadier General
United_States
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Drives: E90
Join Date: May 2012
Location: MARLAND

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The tensioner has two moving parts: the pulley and the tension spring. It is a very rare occurrence that the spring would break and fail. If it did the belt would fall off or at least squeal. Commonly, the pulley bearing will fail, but at 64K unless it is making noise, it looks like the dealer is selling an unnecessary repair. Just my opinion.