Thanks for the replies, no luck so far. Some people have mentioned possibly rust build up on magnetic speed sensors on the wheel bearings? The Bongo doesn’t get driven regularly so does that sound feasible at all??

Hi all, new on here!

I have 51 plate import Bongo. All was fine but the ABS dashboard light came on a few months back. It will not clear. Obviously failed the MOT and has had new rear ABS sensors and replacement ABS pump. The light went out for 5 minutes after the pump was replaced but back on now ...