It could be a front control arm (that's front of rear hub), that's a favourite!
They look like this
Genuine Jaguar X-Type Rear Suspension Control Arm C2S50863 | eBay
I had one go last week and I burnt out a pair of rear tyres as one wheel toed out massively and dragged the other along with it.
They aren't that hard to change providing the bolts aren't seized.
You need to remove the wheel to check these, like written, they are to bolted to the front of the rear hub and to the chassis.
Often jacking up and rocking the wheel will show up some play.
The inner rose jointed bush (the longer bush) usually gives up the ghost first.
The Anti roll bar can knock as well, the bar can rattle or double knock over bumps and the droplinks at either end can bang about, also the round retaining lumps welded to the bar next to the bushes can break off, this will let the bar slide through the bushes and clatter.
Worth checking, grab the bar and try rattling it in the bushes, check the round retainers next to the bushes, that they're still there!! And the droplinks are tight, try all this with the wheels on the ground, so crawl under.
They look like this
Genuine Jaguar X-Type Rear Suspension Control Arm C2S50863 | eBay
I had one go last week and I burnt out a pair of rear tyres as one wheel toed out massively and dragged the other along with it.
They aren't that hard to change providing the bolts aren't seized.
You need to remove the wheel to check these, like written, they are to bolted to the front of the rear hub and to the chassis.
Often jacking up and rocking the wheel will show up some play.
The inner rose jointed bush (the longer bush) usually gives up the ghost first.
The Anti roll bar can knock as well, the bar can rattle or double knock over bumps and the droplinks at either end can bang about, also the round retaining lumps welded to the bar next to the bushes can break off, this will let the bar slide through the bushes and clatter.
Worth checking, grab the bar and try rattling it in the bushes, check the round retainers next to the bushes, that they're still there!! And the droplinks are tight, try all this with the wheels on the ground, so crawl under.