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Front Subframe

Fig 1: Front Subframe
G04725136Courtesy of BMW OF NORTH AMERICA, INC.

A main component of the front suspension is the Subframe. It is made from hydro-formed steel tubing and bolts directly to the body. The subframe provides the location for all suspension and steering components with the exception of the upper strut mounts. Attached between the front of the subframe and the bumper are the crush tubes. These tubes are attached with two bolts to the subframe and are designed to deform in an accident.

Fig 2: Crush Tubes
G04725137Courtesy of BMW OF NORTH AMERICA, INC.