I currently have an AUX cable going to the 12 pin connector on the stock head unit in the Mini. It seems to have developed a loose connection somewhere and instead of replacing it I was think of adding a bluetooth thingy like the one pictured above.

Does anyone have/use one of those? I dont know which one to buy, all them seem to be unbranded without any reviews on Amazon or Ebay. For eg:

EDIT: To not cause any confusion, this is not a FM transmitter.