Had a chap pop in with a fault on his Ceyenne just as I was closing on Saturday.
Fine on the motorway coming down from Leeds.
But around town and low speeds a drumming/vibration was coming through the body - a bit like a badly deformed tyre but worse.
A quick road test round the block and then a check underneath revealed all.
The prop has a centre joint and bearing. The rubber mount had collapsed.
If your'e like me you don't see many of these in your workshop, but it's just worth bearing in mind.
Don't know if it's a common issue with these or not.

Nick