Review on Enhanced Keyecu EWS Flip Remote Key 315MHZ ID44 1998-2005 for BMW 3 5 + 7 Series HU58: Upgrade Your BMW Key Experience by Alex Ferry

Works great and feels high quality. the only negative transponder went beyond the key. I had the key programmed by a locksmith ($100) and they said there is no specific place for a transponder in the key. The transponder rumbled in the key fob but just a bit of CA to hold it in place and it all works great and feels great.