Serpentine Belt Tensioner with Pulley - 1AEBT00045

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Vehicle Fit


  • Alternator Belt Tensioner
  • Includes pulley
  • Replaces dealer part numbers: 058903133D, 058 903 133 D
  • Direct replacement
  • Built to strict quality control standards


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 : Accessing the Tensioner (0:55)
    • Remove the engine oil dipstick
    • Pull off the plastic engine cover
    • Insert the oil dipstick
    • Pull the radiator hose aside for better access
  2. step : Testing the Belt Tensioner (1:29)
    • Pull on the belt by hand to test tension
    • If the belt moves by hand, the tensioner is worn
  3. step : Removing the Belt Tensioner (1:42)
    • Attach a 13mm socket with ratchet and extension or vise grip pliers to the tensioner knob
    • Pull the tensioner aside to release tension from the belt
    • Pull the belt off the tensioner and the alternator
    • Release the tensioner
    • Remove the three 13mm bolts from the belt tensioner
    • Pull the tensioner off, up, and out of the engine compartment
  4. step : Installing the New Belt Tensioner (3:32)
    • Put the new tensioner into place
    • Start one of the 13mm bolts by hand
    • Start the other two 13mm bolts by hand
    • Tighten the three 13mm bolts to between 25 – 30 foot-pounds
    • Consult a belt diagram if necessary
    • Attach vise-grip pliers to the tensioner knob
    • Pull the tensioner aside
    • Pull the belt over the alternator
    • Release the tensioner
  5. step : Reinstalling the Engine Cover (4:58)
    • Remove the oil dipstick
    • Put the plastic engine cover back on
    • Insert the engine oil dipstick

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Vise Grip Pliers

  • Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Sockets - Metric

  • 13mm Socket

  • Wrenches - Metric

  • 13mm Wrench

5.00/ 5.0
5 Stars
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2 Stars
1 Star
2001 vw passat
Part looked amazing and up to part and operates perfectly 1a auto is highly recommended
August 27, 2018
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Year Make Model Description
1997-2001Audi A4 Audi A4 Alternator Serpentine Belt Tensioner with Pulley L4 1.8L Turbo
1997-2001Audi A4 Quattro Audi A4 Quattro Alternator Serpentine Belt Tensioner with Pulley L4 1.8L Turbo
1998-2005Volkswagen Passat VW Passat Alternator Serpentine Belt Tensioner with Pulley L4 1.8L Turbo
Part #: 1AEBT00045

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(05:33 min)