The MICHELIN SMAMP42009 Automotive Drive Belt Idler offers durable construction and excellent performance that allows it to perform as expected of an OE component. Premium materials ensure smooth and efficient rotation that not only ensures drive belt longevity, but also reduces vibration and unnecessary slack. The idler design also provides maximum guidance and power transmission for serpentine belt drive systems, boosting performance and efficiency. This automotive drive belt idler also comes with a one-year product warranty.

Manufacturer:  MICHELIN


  • Part Number: SMAMP42009
  • Weight: 4.8 ounces
  • Dimensions: 1.63 x 3.75 x 3.75 inches
  • Origin: China


  • Designed with premium materials for maximum performance
  • Performs to OE specifications
  • Provides smooth and efficient rotation to prevent excessive vibration and slack
  • Reduces excessive wear and friction in engine drive belt systems
  • One-year product warranty from date of shipment


  • Fitment varies by vehicle make and model


This drive belt idler from MICHELIN is a great choice for replacing existing serpentine drive belt idlers. Premium components ensure a long-lasting product that’s built to reduce wear and tear and extend the life of your engine drive belt system. The one-year product warranty covers defects in material and workmanship under typical service and use, giving you greater peace of mind about your purchase. Don’t forget to check if this drive belt idler fits your vehicle make and model before attempting any installation.

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