BMW 640i xDrive Drive Belt Idler Pulley Replacement Cost.

The average cost for a Drive Belt Idler Pulley Replacement is between $178 and $212. Labor costs are estimated between $123 and $156 while parts are priced between $55 and $56. Estimate does not include taxes and fees.

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Common Misdiagnoses

Care must be taken to properly diagnose a noise from the drive belt area. In some cases, it can be quite difficult to determine which component is causing the abnormal noise.

Best Practices

The drive belt(s) should the thoroughly inspected and replaced as necessary when servicing a drive belt tensioner or idler pulley.

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