[Philip Fisher]

Have you read the sticky post at the top of this forum? This contains almost as much information as I know.

Repair cost is circa 3.5k. Mine is still waiting for repair as the parts are on back order.

As for prevalence, it is very difficult to say as no data exists. This car has only been on the market for about 4.5 years too. Mine first started to fault at just over 100k miles and 4 years old. It is now becoming increasingly difficult to drive with significant judder from the rear end.

Yes, 4 and 5 year timescales and percentage contribution you mention is correct.