C2D21150 & C2P12811 Right Side Serpentine Tensioner, Tensioner, Accessory Drive Belt Tensioner Assembly Jaguar F-Type, XF, XJ, XK & more. OE/OEM Part Number : C2D21150. Type : Tensioner Assembly. Stereo Radio Install Wire Harness + Antenna Adapter For Buick Chevy GMC Pontiac.