BRAKE PRESURE SWITCH, TRANSDUCER, LOCATED ON BRAKE MASTER CYLINDER. SEE #3 IN ILLUSTRATION. FITS 2003-2008 S-TYPE FROM VIN M45255 & 2004-2009 XJ8 XJR & 2003-2006 XK8 XKR FROM VIN A30645. **SOME APPLICATIONS USE QTY 1, OTHERS USE QTY 2. PLEASE REFER TO EPC CATALOGING!** (XR828106)