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OPR Belt Tensioner Assembly (96-99 GT)

Market Price $56.99 You Save 12% ($7.00)
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  • Item 100889
  • MPN# 100889

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Features & Details

  • Provides Proper Serpentine Belt Tension
  • Steel Pulley
  • Sealed-For-Life Bearing
  • Direct Fit Replacement
  • Ford Motor Company Equivalent Part# F7LZ 6B209 AA, F8AZ 6B209 AA
  • Fits 1996-1999 GT Mustangs
Correct Tension. Is your GT 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 76mm steel 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 1996 to 1999 GT Mustangs equipped with the SOHC 4.6L V8 engine. Equivalent to Ford part# F7LZ 6B209 AA or F8AZ 6B209 AA.
  • Pulley Diameter: 76mm
  • Pulley Bearing Diameter: 40mm
  • Pulley Bearing Inner Diameter: 17mm
  • Pulley Grooves: 0
  • Pulley Material: Steel
  • Pulley/Belt Type: Serpentine
  • Maximum Belt Width: 20"

Fitment: 1996 1997 1998 1999 Details

What's in the Box
  • (1) Belt Tensioner
Installation Info
Tech Specs
Will it fit my Mustang?
  • GT - 96, 97, 98, 99

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Most Helpful Reviews

Great Tension

I have a 1999 SVT Cobra and my old tensioner for some reason did not have a place to put in a socket to release the tension on the belt. I bought this one to replace the old one and release tension to ...

Read More
Helpful (2)

No noise

So far doing its job. No noise. This tensioner is made a lot better than the one that was replaced

Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 13 Reviews

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Customer Reviews (13) Write a Review

Overall Rating 4.9

out of 5 stars

  • 5/5

    November 23, 2015

    Great Tension

    I have a 1999 SVT Cobra and my old tensioner for some reason did not have a place to put in a socket to release the tension on the belt. I bought this one to replace the old one and release tension to replace the belt. It has a good fit and solved the problem completely. Definately a good product if your tensioner is not working very well


    Year: 1999 Submodel: Cobra Medford OR

    Helpful (2)

  • 5/5

    October 30, 2016

    No noise

    So far doing its job. No noise. This tensioner is made a lot better than the one that was replaced


    Year: 1997 Submodel: GT

    Helpful (1)

  • 5/5

    March 08, 2016

    Belt tensioner

    Great product, fit right in to my 97 ford mustang gt. I paintedited it blue


    Year: 1997 Submodel: GT

    Helpful (1)

  • 5/5

    August 27, 2015

    Just As Described

    This tensioner was just as described and seems to be a good quality part. Very easy to install. As always, super fast shipping on the part of AM.


    Year: 1999 Submodel: GT Soperton, GA

    Helpful (1)

  • 5/5

    June 12, 2015

    Another excellent transaction

    Tensioner fits like a charm, great price and Free Shipping! American Muscle is always free, not like places that say Free Shipping (if you spend so much) or you buy certain parts, or you pay for shipping in the price. prices are lower than most and still Free (as in Beer ) shipping. this is a part that is a pita to install, just because of where its located. in my case behind the super charger. once all the parts were out of the way, it just fit, no hammers drills saws or welders needed to install it. of you idler pulleys or tensioner are looking rusty, or you need to swap out the serpentine belt. Buy this, it will make your life easier and cheaper down the road


    Year: 1998 Submodel: GT Pacific Northwet

    Helpful (1)

  • 5/5

    July 18, 2014

    Good as new

    This tensioner does its job well with the added benefit of that shiny, new appearance. My old belt was slipping and getting torn and wound around the shaft of the tensioner, and the pulley had separated from the bearings causing it to grind circles into the engine block. The new tensioner went right on without difficulty, and the new belt is no longer slipping. I look forward to my next purchase(s) from AM....but hopefully for performance, not repairs, in the future.


    Year: 1998 Submodel: GT Houston, TX

    Helpful (1)

  • 4/5

    March 21, 2014

    Sturdy solid replacement for O.E.M ford part

    This part is exactly what I needed. My other tensioner was squealing badly and the bearing failed and also ripped my belt. This tensioner does exactly as advertised and has the proper tension to keep the belt in place and around all the other pulleys. Thanks


    Year: 1999 Submodel: GT NJ

    Helpful (1)

  • 5/5

    July 17, 2017


    Serpentine belt was squeaking replaced the original tensioner and the idler pulley and the squeak is gone


    Year: 1998 Submodel: GT

    Helpful (0)

  • 5/5

    June 26, 2017

    OPR belt tensioner

    tensioner works fine-and stop my belt slip also looks great under the hood.


    Year: 1989 Submodel: LX

    Helpful (0)

  • 5/5

    April 06, 2017

    Nice fit

    Piece fits perfectly and is working well. Would recommend for anyone over 150000 miles.


    Year: 2004 Submodel: GT

    Helpful (0)

  • 5/5

    March 05, 2017

    OPR Belt Tensioner Assembly

    as always good deal great price thank you again !!!


    Year: 1996 Submodel: GT

    Helpful (0)

  • 5/5

    August 27, 2015

    Good Quality.. Fast shipping

    Great quality item.. Solved my squealing and slippage problems. Fast shipping and packaged well.


    Year: 1997 Submodel: GT Sterling Heights, MI

    Helpful (0)

  • 5/5

    February 16, 2015

    Great Product

    Perfect match for anyone looking to replace their belt tensioner. All of the holes line up perfectly, and there was no hassle to get it torqued down to spec. Before I replaced this, my engine was squealing like a pig, but the moment I turned my GT on after I replaced the pulley, it was back to its old purr. Install only took about 20 minutes, but just make sure that you know how the serpentine belt goes across all of the pulleys before you un-tension it. I recommend taking the serp. belt off of the alternator pulley (top pulley) when this gets replaced. It made it super easy.


    Year: 1996 Submodel: GT Wichita, KS

    Helpful (0)

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