I hope you get it sorted. It's very uncommon for those things to break I think.Machine monkey said:The thinking is and i have an electronics engineer the guy who made the loom for the V8 supra i am also working on agrees. That the TB was losing track of where it was closed open how far open. its then been trying to close or open past where it should have been and stripping the plastic teeth of the gear that drives the flap open closed.
So its a dodgy problem.
In the old days a throttle position sensor was often a culprit for things (the sensor itself, not the wiring), but you rarely see a problem with bmw's with the sealed vdo units.