The idler pulley is a passive, bearing-mounted pulley used to guide and maintain correct tension on the accessory drive belt in the Jaguar XF's engine ancillary system. It does not drive any component directly but ensures the belt follows the correct routing path, preventing slip, misalignment, and premature belt wear. A worn or seized idler pulley bearing will produce audible squealing or rumbling and, if left unaddressed, can lead to belt failure and loss of ancillary systems including the alternator and power steering pump. Key Features Passive, bearing-mounted pulley designed for accessory drive belt routing on the XF engine Direct replacement unit - retains OEM fitment points and belt alignment geometry Supplied to OEM specification under Jaguar part number C2S38295 When replacing this pulley, inspect the drive belt and tensioner pulley simultaneously, as wear typically occurs concurrently across these components Vehicle Fitment This idler pulley is fitted to the Jaguar XF (X250 chassis) as part of the engine ancillary drive system. Not sure about fitment? Feel free to get in touch at [email protected]