Belt Tensioner Spring, BMW - E21 323i, E30 325e/325i, E28 528e, E34 525i, M20

This part is listed by BMW as BMW part number 11311267746 (11-31-1-267-746) and is described as the long spring used to set the timing belt tension on the M20 engine used in E21 323i, E30 325e/325i, E28 528e, and E34 525i. The “tensioner” included with the timing belt kits is really just the pulley and tensioner guide. The actual belt tension comes from this spring so it makes sense to replace the spring at the same time as the belt.

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