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How to Replace Serpentine Belt Tensioner 05-14 Volkswagen Jetta

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  1. step : Removing the Wheel (0:33)
    • Loosen the lug bolt covers with a pick
    • Loosen one of the lug bolts with a key found by the spare tire
    • Loosen the 17mm lug bolts with the vehicle on the ground
    • Raise the vehicle with a floor jack
    • Secure the vehicle on jack stands
    • Remove the lug nuts
    • Pull off the wheel
  2. step : Removing the AC Compressor Belt (1:08)
    • Remove the T25 screws along the splash shield and inner fender
    • Remove the inner fender
    • Place a 15mm socket and ratchet
    • Pull back on the tensioner
    • Pull the belt off the pulley
    • Release the tensioner
  3. step : Removing the Lower Tensioner (1:57)
    • Remove the 15mm bolt from the tensioner
    • Remove the pulley
    • Insert the M10 12-point bit and remove the bolt from the tensioner
  4. step : Installing the Lower Tensioner (2:35)
    • Insert the lower tensioner into place
    • Tighten the M10 bolt
    • Insert the pulley
    • Tighten the 15mm bolt to the pulley
  5. step : Reinstalling the AC Compressor Belt (3:06)
    • Insert the ratchet to the tensioner
    • Place the belt on the larger tensioner
    • Pull back on the tensioner
    • Pull the belt onto the pulley
    • Release the tensioner
    • Insert the inner fender into place
    • Insert the T25 screws along the splash shield and inner fender
  6. step : Reattaching the Wheel (3:38)
    • Slide the wheel into place
    • Start the lug bolts by hand
    • Tighten the lug bolts preliminarily
    • Lower the vehicle to the ground
    • Tighten the lug bolts to 100 foot-pounds in a crossing or star pattern
    • Tighten the lug bolt covers

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of Thanks.

In this video, we're going to show you how to replace the AC belt tensioner on this 2005 Volkswagen Jetta. The items you'll need for this is a 15 and 17 millimeter socket and ratchet, T25 Torx bit, an M10 12-point bit, flat blade screwdriver, torque wrench, and jack and jack stands.

Using your pick, remove these caps. For one of these lug nuts, you're going to have to use a key. The key can be found in your trunk with the spare tire. It just inserts into that special lug nut and then removes the same as the other lug nuts, using a 17 millimeter socket. If you have air powered tools, you can raise your vehicle then remove the lug nuts. If you don't, loosen the lug nuts while the vehicle is on the ground, then raise and support the vehicle and remove them the rest of the way. Your wheel will pull free.

Next, you want to remove this panel. It's held in with a series of T25 screws. There's also a few of them down here. We'll fast-forward as Mike removes those. Now you can pull this panel down. Pull down the front first and then it slides out.

Using a 15 millimeter socket and ratchet, just put it on the tensioner and pull back. Pull the belt up this front pulley. Release the tensioner and pull the belt off this pulley. Remove the 15 millimeter bolt on the tensioner. Now, you can remove that pulley.

Then, using your M10 12-point bit and the appropriate socket size, in this case, I think we used a 13, you just want to loosen up and remove that bolt. Now, your tensioner will pull free.

There's a wider tab and smaller tab. The wider tab goes up here, smaller tab down here. We'll fast-forward as Mike replaces that M10 bolt and tightens it up.

Then, replace the pulley and the bolt that holds the pulley in place, and just tighten that up. Put your ratchet back on the tensioner, tuck the belt onto that larger pulley, and pull the tensioner back, and put it onto the front pulley. Release the tensioner. Then, just replace that panel and all the screws and tighten them up.

Replace your wheel, and you'll realize here that lug nuts are a bit easier than lug bolts. You have to try to hold the wheel in place while you put a lug bolt through. You want to balance it on the hub, and eventually the bolt will line up and push in. Then you want to tighten those preliminarily, and replace and tighten up each of those. Then lower the vehicle and tighten them up the rest of the way. Torque each of these to 100 foot-pounds in a crossing pattern, and replace your lug nut caps.

We hope this video helps you out. Brought to you by, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    General Tools

  • Jack Stands
  • Floor Jack
  • Pick

  • Ratchets & Related

  • Torque Wrench
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 17mm Socket
  • 15mm Socket

  • Specialty Tools

  • M10 12 Point Bit

  • Star Drivers & Sockets

  • T25 Driver

2007 - 2008  Volkswagen  Jetta
1999 - 2005  Volkswagen  Jetta
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1998 - 2005  Volkswagen  Beetle

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