my Boxster is haunted

[Dog'sLife]

Locate and properly clean your drain tubes. There's a few of them. The entire back window area is intended to drain to specific places that have drain tubes. These tubes can clog easily as they're tiny.

As a note this should be regular maintenance.

Until then don't park in the rain. You'll eventually fry the immobilizer that costs big bucks. And that's not why we drive these Porsche's.