Motor vehicle mounts tunable property on the basis of the active material

Tunable property bracket for a vehicle body, comprising: a support member having a first active material that is configured to provide a support for static and dynamic loads during normal operation of the vehicle body, wherein the first active material undergoes a change in a property when during a stress event or a sensed load event of an activating condition is exposed, wherein the change in the property serves to provide a load carrying capacity change to the support member.