I don't know what it's called either but will use all of the above..... when trying to find the answer on the t'internet (it's cheaper but sometimes scarier) I came across the symptoms for the dual mass flywheel going wrong on the diesel versions..ie;
The 'bad' flywheel will go into a wobble at tickover causing very lumpy tickover, blipping the throttle will settle it briefly. There are six timing pins in the back of the flywheel which pass a sensor in the bell housing. The sensor sends the signals for the pump timing on the 6 cylinder BMW/ Range Rover engine. This problem occurs after about 100,000 miles. The only cure is a new flywheel

This sounds like my symptoms but I obviously don't have a DMF. Would a fault/crack in my flexiplate cause similar? The car currently moves very well....it only shows at tick over.
 
I don't know what it's called either but will use all of the above..... when trying to find the answer on the t'internet (it's cheaper but sometimes scarier) I came across the symptoms for the dual mass flywheel going wrong on the diesel versions..ie;
The 'bad' flywheel will go into a wobble at tickover causing very lumpy tickover, blipping the throttle will settle it briefly. There are six timing pins in the back of the flywheel which pass a sensor in the bell housing. The sensor sends the signals for the pump timing on the 6 cylinder BMW/ Range Rover engine. This problem occurs after about 100,000 miles. The only cure is a new flywheel

This sounds like my symptoms but I obviously don't have a DMF. Would a fault/crack in my flexiplate cause similar? The car currently moves very well....it only shows at tick over.
Cracked flex plates are not unknown, if you remove the starter motor you can get a good view.
 
You can also remove the little plate at the bottom of the bell housing and turn the "flyplate" :p with a screwdriver in the correct direction and inspect with a torch. ;)
 

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