Disconnect the wires, and unscrew the O2 sensor. You might want some wd-40 to soak up the sensor's threads before you try to remove it.
No.
oxygen sensor is found either in exhaust manifold or in actual exhaust pipe between manifold and muffler
There isn't one, its wired into the ECM.
Farthest point right before the catalytic converter.
Over by the air filter's box.
Need to hook upto a scanner. Check for codes.
Where is the crankshaft position sensor located on Audi 2002 Audi TT
In a very difficult location since there are four. Get the car up on a hoist to do it.
There will be one before and one after the catalytic converter.
If It is the temp. sensor and not the thermosat I believe it is the bottom of the coolant tank. I thimk you have to buy a new tank.
Where is the crank shaft sensor located in a Audi a6
Where is the fuse panel on a 1997 Audi A4?