LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 2011 >> 740i >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Passive Safety Systems -- Overview >> System Components >> Sensors and Switches >> Up-Front sensor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Up-Front sensor

The airbag up-front sensors in the front area of the side member on the left and right sides serve to detect a head-on collision. They deliver additional information on the progress and severity of the collision to the crash safety module.

Each airbag up-front sensor consists of an acceleration sensor for recording the deceleration, a signal conditioner and an ASIC for data transmission.

The measured values are sent in the form of a data telegram to the crash safety module and are used in the calculation of the algorithm.

Fig 1: Identifying Up-Front Sensor
G06925587Courtesy of BMW OF NORTH AMERICA, INC.