Genuine OE Thermal Switch DBC12183 For XJ6 & XJ12 1987-1994 Classic XJS Sports Coupe/Convertible 1975-1996. XJ6 & XJ12 1987-1994 Classic XJS Sports Coupe/Convertible 1975-1996. Classical Parts. We use original drawings and tooling, often by the original suppliers to manufacture quality parts to the precise specifications to ensure 100% authenticity.