These are the correct factory parts when adding VW quick release seats. They are located underneath the vehicle to help strengthen the area the bolts go through the floor. 4 x Rear Seat Bracket Supports - for the installation of rear seats.
2x OEM Rear Bench Seat Floor Double Bracket Reinforcement VW T5 Transporter & T6
Peugeot 108 Rear Bench Seat Bench Fully Black 2015-2021 Ref 604
4x OEM GLOW PLUG PRESSURE SENSOR VAUXHALL ASTRA INSIGNIA ZAFIRA 2.0 55590467
4X OEM BMW TPMS Tyre Pressure Sensors 36106887147 X3 G01 X5 G05 X7 X4 X6 433Mhz
Pair of Land Rover Series & Defender 2 Man Folding Rear Bench Seat - Black Vinyl
DEFENDER 90/110 2 FOLDING REAR BENCH SEATS + 4 LAP SEAT BELTS -RBSK01