Oil pressure sending unit
 

Hello,
I have a '03 A6 Quattro with the 3.0 engine, auto tranny, 118k miles. Recently it has been intermittently displaying a low oil pressure warning on the dash. I am going to start with replacing the oil pressure sending unit, I ordered one and it should be here in a few days. Where exactly is this sending unit located? Is it easy to get to and change?
Thank you for your help

the oil pressure switch is located above the oil cooler where the oil filter goes...its a little trickey to get to...there is a tsb on the oil pressure lights coming on on those engines, more than likely you have a massive oil leak at your adjusters or the oil check valves are bad in your block

link to tech bulletin
 

Is there a link to this tech bulletin? Where can I find more info on this situation? What adjusters are you referring too? How in depth is this?
Thank you for your help

the adjusters i am talking about are the cam adjusters, the check valves live under the valley pan under the intake...either job is very involved....