My electrical system had a constant draw which was draining the battery. Dealer ruled out FSU and thought it was the control module. But after further checks, it turned out that the sound system amplifier was the source of the constant drain.

Anyone know of an inexpensive source for a replacement for the amp? List is over $1300.John
2004 Z4 3.0 6spd
1998 540i6

1994 325i
1993 325i
1992 325is
1986 325e
1984 318i
1980 320i
1978 320i
1974 2002
1968 1600
1967 R60