Serpentine Belt Tensioner with Pulley - 1AEBT00008

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Vehicle Fit

This replacement serpentine belt tensioner is just what you need to get your vehicle in good working order again! If you are hearing a whirring noise from the front of your engine or if your belt often screeches you may be in need of a new belt tensioner. This part commonly wears out between 60,000 and 70,000 Miles. If it fails suddenly it can leave you stranded.


  • Direct replacement
  • Brand new not rebuilt

To ensure fit please match the 8th digit of your VIN number to the VIN code in the title. Your vehicles VIN number can be found in the lower left corner of the windshield or on your registration.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Disconnecting the Battery (0:56)
    • Locate your belt routing diagram, usually found near the radiator
    • Disconnect the negative battery terminal
  2. step : Removing the Intake Hose (1:13)
    • Loosen the clamps and unclip your filter box cover
    • Tuck it out of the way
  3. step : Removing the Serpentine Belt (1:57)
    • Use your 3/8ths drive ratchet handle to push down and release the tension from the belt
    • Remove the belt
    • Use a 13mm wrench and a little pressure
  4. step : Remove Serpentine Belt Tensioner (2:45)
    • Use your 13mm wrench
    • Remove and replace with the new tensioner
    • Ensure that you tighten it up with your wrench
  5. step : Inspecting and Replacing Serpentine Belt (4:50)
    • Inspect the belt for breaks, cracks and imperfections
    • Use the diagram and your wrench on the tensioner to replace the serpentine belt
  6. step : Reconnecting the Battery (6:36)
    • Inspect all the pulleys
    • Reattach the intake hose
    • Reconnect the battery

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 13mm Socket

  • Wrenches - Metric

  • 8mm Wrench

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Year Make Model Description
1996-1997Ford Aerostar Ford Aerostar Serpentine Belt Tensioner with Pulley V6 4.0L
1993-1999Ford Explorer Ford Explorer Serpentine Belt Tensioner with Pulley V6 4.0L
2000Ford Explorer Ford Explorer Serpentine Belt Tensioner with Pulley V6 4.0L (8th Vin Digit X)
1994-2000Ford Ranger Ford Ranger Serpentine Belt Tensioner with Pulley V6 4.0L
1994-2000Mazda B4000 Truck Mazda B4000 Truck Serpentine Belt Tensioner with Pulley V6 4.0L
1993-1994Mazda Navajo Mazda Navajo Serpentine Belt Tensioner with Pulley V6 4.0L
1998-1999Mercury Mountaineer Mercury Mountaineer Serpentine Belt Tensioner with Pulley V6 4.0L
Part #: 1AEBT00008

Order must be placed by 4pm ET
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Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Get it in: 2 - 4 Business Days

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How-to Video:

(07:49 min)