Lexus IS200/IS300 Alarm Siren Removal

My theft warning siren was going off independently of the alarm system. Here is how to remove it.

Update: If you wish to maintain the siren, here is a preliminary guide for battery replacement Siren backup battery replacement by charsiurice

The siren is behind the right side boot lining. Start by pulling it.

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The siren is installed on the back side of that panel with the white plug.

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Removal is as follows:

  • Remove the 2 gold nuts (10mm)
  • Pull out the siren module
  • Unclip the connector

Cable tie the connector in a position so it won’t rattle.

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Reinstall the boot liner.

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Removing the siren doesn’t seem to cause any issues; both the alarm and central locking still work.

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