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Home >> BMW >> 2014 >> M235i Standard Trans >> Repair and Diagnosis >> General Information >> OEM General Information >> Functional Description - 2-Series (F22) - Steering System, Restraints System, Stability Control System, Tire & Wheel System, Lubrication System >> Restraints System - Functional Description >> Crash-active head restraint >> System functions >> Impact detection

Impact detection

The direction and severity of an impact is detected by the acceleration sensors in the crash safety module or MRS control unit and by external acceleration sensors. The crash safety module or MRS control unit process all the acceleration data.

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