Dorman's Diesel Emissions Fluid Filler Cap effectively prevents diesel exhaust fluid from leaking or spilling through the filler neck. Integral for helping to keep pollutants out of the environment, replacement restores the diesel emissions fluid system to proper operation.Vehicle model years this part fits:Isuzu NPR: 2011, 2012, 2013, 2014, 2015, 2016 Isuzu NPR-HD: 2011, 2012, 2013, 2014, 2015, 2016 Isuzu NQR: 2011, 2012, 2013, 2014, 2015, 2016 Isuzu NRR: 2011, 2012, 2013, 2014, 2015, 2016 Isuzu Reach: 2011, 2012, 2013, 2014, 2015