This is awesome info here! My dad's 2005 325it voltage regulator recently went bad. I just received a Bosch VR from AutohausAZ yesterday & it came with a rectangular plug. Dad's car has an oval plug... Well it looks like I'm gonna return the VR & get the 150amp alternator from the local O'reilly's for $119.99. I called & they said it does have the oval plug. I'll try my luck!