i have a 1999 a4 2.8 30v and need to replace the bank1 sensor1 O2 sensor. does anyone have any pictures where it is located or can explain where exactly i can find it? also, are there any special tools i will need to replace it?
edit: could you guys also tell me where the camshaft posistion sensor bank2 is located?

 

the best advice i can give you is to run to your local parts store (Auto zone) and pick up a haynes manual for your car and look threw it. it will help you out alot.. i bought one as soon as i knew i was buying an A4 and i dont regret it at all..

 

i just bought a universal bosch o2 sensor that will need the plug from the other (used) sensor. if i am thinking right the bank 1 sensor 1 is located on passenger side under and behind the air box on the fire wall? can anybody confirm this?