New OEM Genuine Jaguar o2 Oxygen Sensor new in the box - not aftermarket junk! Fits the lower position only, away from the motor IN the catalyitc converter but not down in the rear of the pipes. If view the schematic, there are 6 sensors on the system, 2 in the manifolds, 2 in the catalytic (this one), and 2 and the end of the exhaust. This is the the middle one in the catalytic (#4 in in schematic) left or right position are the same. Fits 5.0 motor models only (OEM # C2P16397) in the following: Name Year Jaguar XF 4.2L V8 A/T Base Sedan 2010 Jaguar XF 5.0L V8 A/T Base Sedan 2011, 2012 Jaguar XF 5.0L V8 A/T Portfolio Sedan 2012 Jaguar XF 5.0L V8 A/T Premium Sedan 2010, 2011 Jaguar XF 5.0L V8 A/T Supercharged Sedan 2010, 2011, 2012 Jaguar XFR 5.0L V8 A/T Base Sedan 2010, 2011, 2012 Jaguar XJ 5.0L V8 A/T AWD L Portfolio Sedan 2013 Jaguar XJ 5.0L V8 A/T Base Sedan 2010, 2011, 2012 Jaguar XJ 5.0L V8 A/T L Portfolio Sedan 2012 Jaguar XJ 5.0L V8 A/T L Sedan 2010, 2011 Jaguar XJ 5.0L V8 A/T L Supercharged Sedan 2010, 2011, 2012 Jaguar XJ 5.0L V8 A/T L Supersport Sedan 2010, 2011, 2012 Jaguar XJ 5.0L V8 A/T RWD L Portfolio Sedan 2013 Jaguar XJ 5.0L V8 A/T RWD L Supercharged Sedan 2013 Jaguar XJ 5.0L V8 A/T RWD L Supersport Sedan 2013 Jaguar XJ 5.0L V8 A/T RWD L Ultimate Sedan 2013 Jaguar XJ 5.0L V8 A/T RWD Supercharged Sedan 2013 Jaguar XJ 5.0L V8 A/T RWD Supersport Sedan 2013 Jaguar XJ 5.0L V8 A/T Supercharged Sedan 2010, 2011, 2012 Jaguar XJ 5.0L V8 A/T Supersport Sedan 2010, 2011, 2012 Jaguar XK 5.0L V8 A/T Base Convertible 2010, 2011, 2012, 2013, 2014, 2015 Jaguar XK 5.0L V8 A/T Base Coupe 2010, 2011, 2012, 2013, 2014, 2015 Jaguar XK 5.0L V8 A/T Touring Convertible 2014 Jaguar XK 5.0L V8 A/T Touring Coupe 2014 Jaguar XKR 5.0L V8 A/T Base Convertible 2010, 2011, 2012, 2013, 2014, 2015 Jaguar XKR 5.0L V8 A/T Base Coupe 2010, 2011, 2012, 2013, 2014, 2015 Jaguar XKR-S 5.0L V8 A/T Base Convertible 2012, 2013, 2014, 2015 Jaguar XKR-S 5.0L V8 A/T Base Coupe 2012, 2013, 2014, 2015 Jaguar XKR-S 5.0L V8 A/T GT Convertible 2014 Jaguar XKR-S 5.0L V8 A/T GT Coupe 2014