ok i have this problem = i have already tried BBA reman and ecu testing in derbyshire...both replied with "we do not have the rig to test this"

my pump is 98ag

looking on ebay this is not a popular pump - your pump might be more readily available

so i tried 4.2 motors in tottenham (22 years mechanic for my cousin) they took time and effort to ask me about any repairs that had been done and they actually put car on ramp and went into sensor reading menus on the diagnostic while spinnig each wheel to get a reading - low and behold abs sensor 1 input circuit etc aswell as abs/tcs error -

the prognosis was that either the abs ring is broken or bearing is fitted wrong way round (my original guess) thus causing the relay in the abs pump to break circuit or whatever it isnt doing properly. either that or pump is fooked...

my point is let a garage diagnose it properly...someone trusted that will make effort....

dont throw money at a pump yet...