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How to Replace Downstream O2 Oxygen Sensor Volkswagen 18T 99-05 Jetta

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How to Replace Downstream O2 Oxygen Sensor Volkswagen 18T 99-05 Jetta

Created on: 2014-04-07

If the oxygen sensor on your 99-05 Volkswagen Jetta needs replacing, check out this video from 1A Auto to learn how to do it yourself!

  1. step 1 :Removing the Downstream Oxygen Sensor
    • Raise and secure the vehicle
    • Unbutton the O2 sensor insulation sleeve and pull it off
    • Remove the sensor wire from its bracket
    • Remove the two 10mm nuts from the sensor wire box
    • Pull the downstream O2 sensor wiring harness out of the box
    • Disconnect the downstream O2 sensor wiring harness
    • Put the O2 sensor tool onto the sensor wire and slide it onto the sensor
    • Put a 3/8 inch ratchet into the O2 sensor tool
    • Loosen the sensor until it can be twisted off by hand
    • Twist off the sensor by hand
  2. step 2 :Installing the New Downstream Oxygen Sensor
    • Twist the new O2 sensor into place
    • Tighten the new sensor with the O2 sensor tool and 3/8 inch ratchet
    • Button the insulation sleeve around the sensor wire
    • Clip the new sensor wire into its bracket
    • Reconnect the downstream O2 sensor wiring harness
    • Push the downstream O2 sensor wiring harness into the wiring harness box
    • Push the wiring harness box into place
    • Fasten the two 10mm nuts onto the wiring harness box
    • Lower the vehicle to the ground

Tools needed for replacement

  • General Tools

    Jack Stands

    Floor Jack

  • Ratchets & Related

    Ratchet

    3/8 Inch Drive Ratchet

  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    10mm Socket

  • Specialty Tools

    O2 Sensor Socket

Installation Video
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

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

In this video, we're going to show you how to replace the downstream O2 sensor on this 2004 Volkswagen Jetta with the 1.8 turbo engine, and it's the same part and process on these Jettas from '99 to 2005. The items you'll need for this are a new downstream O2 sensor from 1AAuto.com, 10 mm socket and ratchet, O2 sensor tool, flat blade screwdriver, and jack and jack stands.

Your downstream O2 sensor is located right here. You want to start off by just removing this insulation sleeve from the O2 sensor wire, and it just unbuttons. Now, pull the O2 sensor harness from this bracket and then remove these two 10 mm nuts. We'll fast forward as Don does that. Pull the box down and then pull out the harness for the downstream O2 sensor. Then just push on the tab on the harness and then pull it free. This is a short O2 sensor tool, good for tight spaces like this. You're going to slide it onto the wire and up onto the O2 sensor. Then, using a 3/8 inch ratchet, just insert it into that square hole. Then you just use the ratchet as you normally would to loosen it up. You just want to keep using it to loosen it up. Then once you feel it's loose enough for you to remove by hand, you can just twist it out the rest of the way by hand.

On the left is the old downstream O2 sensor. On the right is the new one from 1A Auto. You can see they're identical and they're going to fit exactly the same. Take your new O2 sensor and just twist it into place. We'll fast forward as Don twists that into place and then tightens it up with that O2 sensor tool. Now rebutton this insulation sleeve around your O2 sensor wires. We'll fast forward as Don finishes that up. Now clip your new O2 sensor wire into that bracket, and if it fell down, just reclip it right up here. Reconnect your downstream O2 sensor harness and push it into place. Make sure the wires are coming out through the openings on the sides and then push this box back up into place. We'll fast forward as Don replaces those two 10 mm nuts and tightens them up. When you're done with that, you're all set.

We hope this video helps you out. Brought to you by www.1AAuto.com, 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

  • Ratchets & Related

  • Ratchet
  • 3/8 Inch Drive Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket

  • Specialty Tools

  • O2 Sensor Socket

2006 - 2010  Volkswagen  Beetle
2000 - 2006  Volkswagen  Golf
1999 - 2005  Volkswagen  Jetta
2001 - 2005  Volkswagen  Beetle
2005 - 2005  Volkswagen  Beetle

01-06 VW Beetle Golf Jetta 2.0L Downstream O2 Oxygen Sensor (15.00 inch)

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Part Details:

  • Direct Fit Replacement - Guaranteed to fit and function for your specific application
  • Quality Tested - built to a strict level of product standards.
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