This is one of the rubber bumpers that protects the body when closing the gas door. For 350Z's, this is the shorter of the rubber gas door bumpers (see 34-1470 in Related Items below for the single taller bumper). On 370Z's, this bumper is mounted on the body just above the hinge and on the gas door itself (370Z's only use this part number). Sold individually, two required per vehicle.
Nissan 350Z, 370Z
Nissan Z33, Z34
2003, 2004, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018