electric vacuum pump switch. Provides vaccum for power brake booster when engine vacuum is too low (cold starts, especially at altitude).
The electric switch end looks to be broken off that one. The brown connector would go on a two wire switch.

If you wait about 20 seconds from starting, your engine will come down off high idle, and you probably will never notice the lack of the vacuum pump. jimmy will fix this if wrong, but my recollection is the intake CVVT gets massively advanced to give gobs of air in to reduce cold start emissions, th...

The exhaust cam is advanced to allow still burning fuel to exit to warm catalyst and to eliminate the need for the previously used exhaust air injection pump. I am a crank and go person so I could feel hard brakes at low altitude in cold weather when I started and selected a gear. The time when ther...

There is no 2007 S70 ...

This is for a 2007 S60.