MOT failure ABS light

Hi can anyone help, my daughters car has just failed the MOT due to the ABS and spanner lights, after spending £200 at the local VX dealer I am told that I need a new ABS unit and a coil pack at £1600 plus fitting I don’t think the car is worth that much. They also said that if I bought a used ABS unit then it would need deprogramming and the replacement unit would also need to be reprogrammed.

My questions are is there a way of replacing the unit without reprogramming.
Does the car need...

MOT failure ABS light