After doing some research into my haldex controller as its broken it seems there is two types of standard controller, the difference appears to be the machined face, one has a slot with two holes and the other just has the holes no slot,is it engine code dependant as to which one you have ? or the year of the car I have the skoda pt no for mine its only £900   but all secondhand ones don't have any pt nos on them  any help appreciated   

A VCDS scan should give you the controller part number.

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this is the part no  02D 900 554 D

 

google images and see

What year is your car?

that is the only haldex controller on the mk1 octy ever....I work in a parts store and have acces to different programs

this is the part no 02D 900 554 D

Yes, that was the replacement ECU PN for my 2002 Octavia 1.8T 4X4 when it was changed under warranty in 2005. The original ECU PN ended in 554B.

Thanks for the replys guys the problem I have is all  the ones on ebay are from the s3 or tt and when I look at the pictures there is two types of oil feed slot / holes I need to know what my machined face looks like if that makes sense so I get one for an arx engine my year is 2001 y reg.When I ask for the part number on ones for sale on ebay they all say its worn off, ive been to skoda and they want £900 no chance..