Vacuum pump up to 2008 model (tandem pump)

Up to 2008 model,  , this vacuum pump, together with the oil suction pump on the right cylinder head, is designed as a tandem pump -3-. 

It is driven by the outlet camshaft on the right cylinder bank.

Fig 1: Identifying Tandem Pump On Right Side Of Cylinder Head - Up To 2008 Model

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.