Likely are genuine. Dealers have been doing the R&R service for a while. Where they remove yours, fit a refurbished OEM set and then yours get refurbished for the next vehicle.
There is always something to learn.[thumbsupbig]
OK,i was talking new,not R&R.
If going R&R,the customer should be told......
My Indie also recently said they have been having some success lately with another type of bush,but seniors disease came along and i have forgotten the type[bigsad][biggrin]
They were just doing a few as a trial.
They have used other brands before,but with no success.Always OEM.
Regarding crankshafts; diesel Jaguars do break them, because they have the same bad design. From my research, the "engineers" that designed the motor either forgot to put anti rotation tags on the main bearings, or decided that using crush would be enough to stop them rotating. At a random time, usually when it is working hard, a main bearing moves enough to block off the oil supply to that bearing, which soon seizes and crankshaft breaks. There are a few sites on the web devoted to this problem; South Africa being one.
Unease grows over Land Rover engine
The Korean government ordered that all diesel land rovers be recalled to check crankshafts.
16,000 faulty Jaguar, Land Rover models pulled in Korea | The Standard
As I understand it, you do not need to replace the crankshaft, just the main bearings with tabs and a suitably modified cap. This might be done without pulling the motor.
If you catch it in time. Usually too late, so its new crank and conrod(s) next to the affected bearing(s) but its definitely a motor out job to replace the crank, as the flywheel has to come off as well.
Jags are not nearly as heavy and dont do offroading so are less likely to fail. Poor assembly technique or incorrect main cap bolt preload excluded of course.
Just my 2c