System Operation and Component Description: Description
WARNING: This page is about a different car, the 2019 Jaguar XJ and 2018 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.
The accessory drive belt, which is a poly-V type belt, it is automatically pre-loaded by the belt tensioner and routed over idlers in order to maintain sufficient friction around the drive pulleys. This ensures slip-free drive of the accessory components.