i would say its the dogbone engine mount, the one that bolts directly underneath it. Mine "went" and jus knocks about a bit. check to see if its worn etc. If you buy an uprated one, beware that they shake the steering wheel like fook. I personally think they are horrible.
charlie
'00 BORA HIGHLINE TDI 142BHP-295NM Confirmed...
18" A8s, Jamex Coilovers, Debadged Grill,
MRC Tuning Chip, Smooth Rear Bumper, LCR Splitter, ARB,
Strut Brace, Alpine Head unit,
Recaros, Milltek Cat-Back, Black Mirrors/roof, New South Performance Boost Guage,
4Motion Hubs, S3 Brake Setup 312mm.