Just replaced my clattering pump, too embarrassing to ignore any longer! So here's my 'how to' on an 03 AJT engine.
Vacuum Pump 074 145 100A £225.50 + VAT Ebay £95 new from Poland - UPDATE - Failed within 2 months
Gasket 075 145 117C £5.35 + VAT *
Intermediate cam follower (drive/push...