2003 Mini Cooper Base, Automatic CVTFACTORY OEM SERVICE PROCEDURE

Auxiliary Powered Siren

The auxiliary powered siren is situated in the left hand rear of the engine bay (viewed from the front bumper). The siren contains electronic circuitry for producing the warning tone when the alarm is triggered. The siren also contains a rechargeable battery that is used to power the siren when the alarm is triggered.

In the armed state the auxiliary powered siren is armed by the BC1 holding the arming line to ground, if the power to the BC1 is lost the arm line will be released, which will send power to the auxiliary powered siren. This will cause the auxiliary powered siren to go into its internal triggering sequence.

Fig 1: Auxiliary Powered Siren
G04724510Courtesy of BMW OF NORTH AMERICA, INC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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