Most diagnostic programs are written when the system is designed. The designer usually over looks wires and connectors as things that cause problems. There is even one that overlooks a fuse .. and that fuse effects the gear box shifting .. but is labeled 'Reverse Light'... because that is one of the things is is connected to.... (not a BMW). The diagnostic says replace the gearbox relays. Replace the relay - still faulty .. then use time to find out the fuse is faulty. Fixed. Until the owner attaches a (faulty) trailer that blows the fuse .. back to faulty. Of course the owner only brings in the car .. no trailer attached. Designers don't do service work in remote areas so are not aware of the problems... $1200 to you, so may be $400?

I think much pressure to fix the problem was applied to the mechanic involved. And that leads to not enough time and thought being used ($$$ labor) to solve the problem ($ part). The more you know about your own bike the more you can avoid problems, or at least minimize other peoples time spent working on your bike (saving money).

Sorry but your going to have to take the hit.

If it can be used on the same model of bike as yours then you may be able to sell it .. eventually some one will need one. Just put the word out amongst the bm mechanics.. how much would you take for it - assuming someone wants it? No I don't want it - don't have one of those oil heads. You'll need to under cut bms dealer price by some margin on the pricing - after shipping too..