10 minutes ago, idleness said:

If DIY you will need VCDS or similar to run the pump, can't remember whether its to get the pump out or sort the oil level when its in. plus top up the oil once its done.

 

I thought the Haldex pump primed when you turn the ignition on?

 

From the videos I've watched they use the VCDS to prime the pump and push the filter housing out, but if my pump is knackered it won't do that.

I'll need to rewatch and see how they get the air out of the system after installing new pump and oil.

I

1 hour ago, J.R. said:

I may have screwed my diff bearings through making a stupid mistake with the drain plugs, so I have a couple of saved E-bay listings of complete diff assemblies with Gen 5 Haldex pump & controller included and they were all around the £250-300 mark inc delivery.

 

If the pump alone is that price it might be worth looking around, buying a complete unit using what you need & selling on the rest, you would still need the oil though, I re-used the old O rings, its easy to judge if they are serviceable, parts not so easy to find here and delivery costs can be prohibitive, if they had been damaged I probably have the right sizes amongst my stock of random O rings otherwise I have a splice tool for made to measure ones.

 

Mine is the Gen 4, including postage i can get the whole kit for £251.19.

 

Forgot to write diameter.

Diameter of pump is 48mm and 50mm, outer diameter of O-ring mounted on pump are 49mm and 50.5mm.

So, I guess you are safe with inner diameter of 47mm and 49mm.