Hey Guys,

I just got a P0420 & P0430 on my 03 996TT X50 with aftermarket exhaust so I want to buy O2 extensions (bungs) and install them myself.

I do alot wrenching myself but have yet to do any work on my 996TT (I just bought it )

ANyone know where I can find a DIY write on how to install these?

Thanks
Nick

 

It should be pretty straight forward. I just did the exhaust swap on mine and the access to the o2 sensors is pretty good. You want to unscrew the sensor closer to bumper, the post cat sensor, and let it hang. Screw in the bung and thread the sensor into it.

You will find that the wiring will twist up when you tighten the sensor so you can either pre twist it so that when you tighten it the wiring is straight or you can disconnect the sensor at the plug and twist it until the cable is in it's normal untwisted position. The plugs for the sensors are to the left and right of the air box. You would be looking to disconnect the ones with the grey wire/sheath and need to pull the wire from the clips that hold it in various places - small hands help. Make sure you put some anti seize on the threads of the sensors and bungs but make sure you get none of it on the sensor tips - one trick is to put it on with a q-tip. Hope this helps.

 

Thanks for the advise. I was wondering if the O2's were easily accesible. I haven't gotten under the car yet, so I don't know If I can access them. I guess I'll find this weekend when I get under it.

I was kinda hoping someone would have a pic

 

I'm almost sure you have to remove the exhaust before you can remove the sensors..

 

Oh no! Thats what I was affraid of!

 

I don't have any pictures but yuo can get the sensors out without dropping the exhaust. The one problem you may encounter is that getting the leverage to break the sensors loose in the room available. The rear sensors that you are going to be removing are easier to get to so you will be able to get them out without dropping the exhaust. Make sure you get the appropriate o2 sensor removal socket because a cresent wrench or open end wrench probably will not grip with the force needed to break the sensors loose.

 

depends on your aftermarket exhaust and where they placed the o2 sensors. Does it have v band clamps and removeable cats? Shouldn't be an hours work either way

 

I agree on the time estimate - should be pretty quick.