A push arm has a rear surface and a front surface. A rear surface of the push arm is located adjacent to and spaced apart from a first cross-member defining a gap therebetween. The push arm extends forward and laterally outward such that the front surface of the push arm is located laterally outboard of and spaced apart from a front end of a first side member of a vehicle frame. A support bracket has a front section releasably attached to the push arm and a rear section releasably attached to a first cross-member of the vehicle frame adjacent to an intersection of the first side member and the first cross-member. The support bracket is configured such that in response to an off-center impact event against the front surface of the push arm, the support bracket guiding movement of the push arm in a rearward direction.