s4 b5 rear abs sensor

changed this the other day, got mine from audi for 140 quid plus the copper sleave. there are a few differant types, i got the wrong one the first time round. later models have a metal bit on the sensor with a 6mm securing bolt. the early ones are a press in type. models with xenon lights have a loom built in on the passanger side for the auto level sensor. think the continuity of the new one was 1.6k ohm