This is the plastic inspection cover that sits over the brake (and clutch for manual trans.) fluid reservoir(s) (US Driver's side) inside the engine compartment. Sold individually, see Related Items below for the battery cover.
The EVO-R Carbon Fiber Battery & Fluid Cover Kit (10-9042 in Related Items below) replaces this inspection cover and the surrounding plastic panel.
2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018