I am going to be having my Timing Belt (05 VW Passat TDI) done pretty soon and also have the oil pump chain checked out. I already have a Timing Belt kit, from idparts and would like to know the parts for the oil pump chain and tensioner, that I should have replaced, while the mechanic has things apart? I don't have the money to replace the whole balance shaft (gear to gear setup), so I am just wanting to replace the chain and necessary parts. Thank You.