Vehicle seat assemblies having tie down brackets

A vehicle seat assembly comprising:

• a seat cushion portion pivotable between a seated position and an access position, the seat cushion portion including a seat cushion frame;
• an underframe having a frame member, a pair of sidewalls and a front wall, the pair of sidewalls and the front wall define a battery cavity beneath the seat cushion portion and the frame member is positioned behind the front wall;
• an opening formed in the front wall of the underframe;
• a tie down bracket including a lower bracket portion extending beneath the seat cushion portion, a central bracket portion, and an upper bracket portion, the central bracket portion is non-planar with the lower bracket portion and the upper bracket portion of the tie down bracket and the central bracket portion includes a central bracket opening;
• a fastener configured to extend through the central bracket opening;
• and
• a releasable fastener configured to extend through the opening and releasably couple the lower bracket portion to the frame member of the underframe to secure the seat cushion portion in the seated position.