Any chance the radio's theft wiring or switch is shorting occasionally? Its located in the lower part of the radio's frame. When the switch closes or the wire shorts to ground, the alarm is triggered.
Its plug looks like this:
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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