Oil Switch Cap
Subaru has made a design change to the rubber cap which covers the electrical connection at the oil pressure switch.
The new cap provides better sealing and resistance to moisture intrusion which can compromise the electrical connection and in some cases cause the oil pressure warning lamp to illuminate in error.
The new rubber cap was incorporated into production during early December 2012 in Forester and Impreza models.
It is available as P/N 22187AA080.