HIS4

I'm trying to figure out if I'm even capable of doing this or not. So I went searching around he engine bay to look for everything I would need to remove and reinstall to access the primary O2 sensors.

First, I traced the wires coming from the O2 sensors to some wiring harnesses on the drivers and passengers sides of the firewall. I assume there is one harness on each side for the primary O2s but I could trace the wire all the way back because of the heat shield wrapped around the cables. Do you guys know which one is the right ones. Here's some pictures

Drivers side harnesses
<img src="http://pictureposter.audiworld.com/19077/drivers_primary_o2_harness.jpg">

Passengers side harnesses
<img src="http://pictureposter.audiworld.com/19077/passengers_primary_o2_harness.jpg">


Then I tried to see how easy it would be to reach the sensors to see if I can actually get a crows foot down there to take them out and put the new ones back in. How the heck to you get your hands all the way in. I tried coming in from all angles but there was no easy ways. Any tips? Here's some pictures of the sensors

Drivers side O2 sensor (this one looks like a real bitch to get to)
<img src="http://pictureposter.audiworld.com/19077/driver_primary_o2.jpg">

Passengers side O2 sensor (this one looks like its much easier but still a stretch)
<img src="http://pictureposter.audiworld.com/19077/passenger_primary_o2.jpg">

magilla70

the connectors are the big black ones on each side. As far as removal goes, a O2 sensor socket, and long extentions are your friends.

ZephyrS4

If it's not right there for me to wrench on, I ain't doing it....even then I manage to screw it up sometimes. Good luck.

5lugnuts

Yo bradda, grab da kine long extension wit da swivel &amp; O2 socket!....*gives shaka sign*

HIS4

If I can't get that one out, I'll just give up and take it somewhere. Looks like I need to order some Zoldman O2s from Vast.

JacobB

You need to remove the airbox, MAF, hose, and the coolant resevior.

BlackS4tt (Josh)

;p

jtsai

really not a bad DIY. wear long sleeves and gloves or you'll scratch yourself up pretty good

DocWyte

I used a 2 foot extension with a wooble and the crowsfoot.

The drivers side is a huge PITA, getting the new one back in was also a huge PITA.

Passengers side one is a straight shot and relatively easy.