Convertible Antenna System - BMW 1999-2005 M3 Service Manual

Radio
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FZV (keyless entry) antenna
combined with FM2 antenna
The FM1/FM2 antenna amplifier is
located beneath the rear spoiler. The
signal from this amplifier is transmitted
to the diversity module in the cargo
compartment behind the left trim panel.
1 - Suppression filter
2 - Antenna amplifier
3 - AM antenna
4 - Diversity module
The FM3 antenna has a separate
amplifier integrated into the diversity
module. The module will select the
clearest signal from the three antennas
and transmit that to the sound system.
The AM antenna is glued to the bottom
of the rear spoiler.

Convertible antenna system

The diversity antenna system on the
E46 Convertible consists of the
following:
Main antenna mast on left rear
fender
Auxiliary antenna in convertible
top storage cover
Main antenna amplifier, mounted
directly below the antenna mast
Auxiliary antenna amplifier,
mounted on convertible top
storage cover and powered
through antenna lead
2/25/2009 11:19 PM