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Inertia Switch

The inertia switch is located under the hood on the right hand side of the bulkhead (view from front bumper).

In the event of the inertia switch being triggered in an accident, the doors will unlock, the windows will open, the interior lights will be illuminated and the hazard warning lights activated.

Inertia Switch Update

Beginning with vehicles produced 09/02, the inertia switch has been eliminated. All functions previously performed by the inertia switch are now done by the MRS4 Control Module.

Fig 1: Inertia Switch
G04724473Courtesy of BMW OF NORTH AMERICA, INC.