Heizung/Klima: Das hat dieser (Bild) Stellmotor für eine Aufgabe ?

[FrankGo]

Ah ja... aus "http://bmwe32.masscom.net" wird man schlau:

The proper way to fix a broken stepper motor mount is to replace the center housing of the heater unit. But since this requires taking the entire heater housing out of the car various "quick fixes" have been applied with success.

Models:
All E32s and E34s with a Behr heating or climate control system.

Quick Fix:
To get to the motors you have to at least remove the radio. Removing the center console also helps getting better clearance to work.

I tiewraped the motor to anything within reach. This includes the metal support frame and the brackets on the heater housing that are used to attach the heater wiring.