Planted Seat Bracket - BMW 3 SERIES COUPE [E92 CHASSIS] (2007-2013)7 10 day build time Planted Seat Bracket BMW 3 Series Coupe [E92 Chassis] (2007 2013) The Planted Seat Bracket is a vehicle specific bracket used as an adapter between the floor of the vehicle and an aftermarket seat and it's accessories. Because the floor of each vehicle varies and typically is not flat, a vehicle specific Seat Bracket is required for installing an aftermarket seat. We create each seat bracket using the floor of the vehicle as a