Throttle position switch. You can see the idle switch which is a sealed micro switch (left) and the WOT switch with the open contacts. Many times this WOT switch fails of fails intermittently, maybe due lo little use (not many WOT situations) or the open construction.

Hella makes this part (6PX008476-01) for quite a few brands:

The Bosch number is 0280 120 322, and the Hella number is 6PX 008476-011.

http://www.mister-auto.de/de/sensor-drosselklappenstellung/bosch-0-280-120-322_g3940_a0300!280!120!322.html

 
THROTTLE POTENTIOMETER

(THROTTLE POSITION SWITCH)

MADE BY HUCO

PART NO...13 8502


BMW 13631273265

Bosch 0280120320
Bosch 0280120322

Huco 138520

Porsche 92860615700

Webcon 9890502600
Webcon WTP060