Hi,
I am looking for a rear tilt sensor for my 2002 Z3 Sport 3.0i. The siren has also caused the alarm to go off, so I am told I need a replacement. Mine has a battery backup, but I am unsure where to find the battery, is the battery and siren available to purchase? or do I need to use a secondhand siren from another BMW model without battery backup? Not sure if that would work. Please help.