Replace the factory subwoofer
by B2 audio BWF8 and re tighten
the screws.
BSW8 is compatible with all BMW models that have the
configuration “Stereo” or “Standard”.
To maximise the performance of this woofer, we are recommended to use 1*4
Channel amplifiers or 2*2Channel amplifiers.
This subwoofer can be installed in the followng car models (Under the front seat).