Fuel pump relay Audi a4? what is the question? does it have one? answer:yes, where is it located: under steering wheel to right. need to remove panel. its the relay on the right.
It's behind the fuse box under the steering wheel, marked with 167.
takes about an hour you access from under rear seat.. unit fitted to fuel tank...check FUEL PUMP RELAY first ....
A fuel pump pressure test could determine that.
Have a pro go at it, PITA to replace.
undreneath the car in front of the right rear wheel
Yes it has, it`s in a fuel tank. (PD engine type)
My guess is that it is your fuel pump that you are hearing.
The 2010 Audi A4 runs on premium unleaded (recommended).
The 2004 Audi A4 runs on premium unleaded (required).
The 2012 Audi A4 runs on premium unleaded (required).
The 2005 Audi A4 runs on premium unleaded (required).
The 2002 Audi A4 runs on premium unleaded (required).