Relay - PSM 5.3 (Serv. No. 45 52/45 54)

The return pump relay -2-  and the solenoid valve relay -1-  are attached to a holder behind the PSM control unit.

Fig 1: Identifying Return Pump Relay And Solenoid Valve Relay - PSM 5.3

Courtesy of PORSCHE OF NORTH AMERICA, INC.