UNDER BONNET/HOOD, SECURITY SWITCH SENSOR. SEE #1 IN SECOND ILLUSTRATION. FITS 2004-2009 XJ8, 2007-2014 XK, 2012-2019 XJ FROM VIN V22230 ON. If your open hood warning light stays on this is the part that needs to be replaced. Replaces C2C33902 C2D18250 C2C4646 (C2D27159)