As above, are they the same? my local vxl parts department say yes, but it wouldnt be the first time they have been wrong!
Pre-2000 mostly tend to have the old steel bolt with copper washer, and after 2000 have the aluminium alloy with rubber o-ring.
On that age you'd be better sticking your head underneath and having a look.
2007 Metro Blue 5 door Mk5 Elite 1.7CDTI
6th Vauxhall (4th Astra) in 10 years...plus a couple of other sheds...