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OPR Belt Tensioner Assembly (94-04 V6)

Item 100890
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Provides Proper Serpentine Belt Tension
      • Polyamide Pulley
      • Sealed-For-Life Bearing
      • Direct Fit Replacement
      • Ford Motor Company Equivalent Part# E9SZ 6B209 D, F4SZ 6B209 B
      • Fits 1994-2004 V6 Mustangs


      Correct Tension. Is your V6 Mustangs serpentine belt slipping or squealing? Then you may be in need of a OPR Replacement Belt Tensioner to provide the correct tension to fix the problem.

      OEM Quality. Made to the original factory specifications, this OPR Replacement Mustang Belt Tensioner has a 82.5mm Polyamide pulley that features a sealed-for-life bearing to provide long reliable maintenance-free operation.

      Application. This OPR Belt Tensioner Assembly is designed for use on the 1994 to 2004 V6 Mustangs equipped with either the 3.8L or 3.9L engine. Equivalent to Ford part# E9SZ 6B209 D or F4SZ 6B209 B.
      • Pulley Width: 28.5mm
      • Pulley Diameter: 82.5mm
      • Pulley Bearing Diameter: 40mm
      • Pulley Bearing Inner Diameter: 17mm
      • Pulley Grooves: 6
      • Pulley Material: Polyamide 6.6 with 30% Glass fiber fill
      • Pulley/Belt Type: Serpentine
      • Maximum Belt Width: 20"


      Fitment: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

      MPN# 100890

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (7)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 7 customers

      • July 06, 2017

        5 1994 V6 - EmilB

        OPR Belt Tensioner Assembly (94-04 V6)

        Put the part in when I got it, and have not had any problems. This is not the first item I have bought stuff from them and wont be the last. No problems with anything I have bought so far.

        Helpful (11)
      • June 20, 2017

        5 2003 V6 - FaronM

        Great fit

        Seemed to fit easier then the factory. No issues with fitment

        Helpful (10)
      • April 26, 2017

        4 2004 V6 - AndrewG


        It was a very great product. Had a belt squeaking problem but now I haven't heard it sense. And it is smaller than the original so that made it a bit easier to install. Great product

        Helpful (10)
      • October 22, 2015

        4 2004 V6 - Eazy


        Perfect fit for 2004 v6 Ford mustang easy replacement

        Helpful (11)
      • August 27, 2014

        5 2002 V6 - Krystin13

        Just what I was needing.

        Fit perfectly since it was created with the original specifications. Finally no squealing under the hood, for my mustang being 12 yrs old, I want to keep it running it's best. I've never had a problem installing this part at all, and to top it off I'm a women!!

        Helpful (11)
      • March 22, 2014

        5 2003 V6 - 03MustangV6

        Belt tensioner

        I just put this tensioner on. It fit great. The car is in storage for the winter so I have not started it since installation. I expect it to work as well as it fits.

        Helpful (10)
      • February 22, 2014

        5 2001 V6 - chadjess

        Great Replacement

        bolted right in and worked perfectly. this is the best value for replacement

        Helpful (10)

      Questions & Answers (4 answers)

      4 Top Rated Questions

      My 04 Mustang has a torx bolt that I need to remove before I can replace this part. I need to know if the bolt is reverse threaded?

      • The bolt is a normal thread. You must turn it counter clockwise to remove.

      Helpful (1)

      Will this fit the 2004 3.9L V6

      • The OPR Belt Tensioner Assembly will work on your 2004 V6.

      Helpful (0)

      Looking for 94, gt,v8, belt tensioner assembly, thanks Paul.

      • Unfortunately, we do not carry a belt tensioner assembly for a 94 GT model Mustang.

      Helpful (0)

      Instructions on putting this part on I'm very curious on where to find a step by step guide on how to put this part on. My engine squeals loud and is very annoying. I was told by a mechanic it's the tensioner and I want to be very sure on how to replace this part but can't find anything on here or the internet. Thanks so much!

      • Can find videos on youtube that is were i found my info. But if you can not seem to find the info online head down to your auto part store and they can help you as well. Auto part stores usually carry a books on how to repair your car

      Helpful (0) Show 1 more answer
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Belt Tensioner

      Tech Specs

      Will It Fit My Mustang

      • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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