Hi everyone!
I have similar problem on my audi A3, 170PS, quattro, 2009 year - "booming noise" during acceleration (2200-2400rpm) on 4, 5, 6 gear.
I have visited my audi dealer and they told my that I need to buy whole drive shaft (part number 1K0521101H)- see the picture bellow.
View attachment 11032
This drive shaft with joints isvery expensive... So I made some "investigation".
I noticed when I change model year to eg. 2007, then the joint can be buy separately.
View attachment 11033
Does everyone know if this part (1K0 521 307A) from 2007 year audi (or older) would be fit in my model (2009 year)?
Best, Simon