Agree with RS3100.. YOU don't know that it's a fake warning... but it's an MOT fail for sure... there have been a number of cases where the airbag ECU has gone faulty, as well as some faults with the connectors.. but dabbling with those connectors is potentially dangerous since they are related to the pyros... and you don't want them to activate.. Only way forward for the present is to get it diagnosed via OBD... I did this for a mate and it was shown as internal error in airbag module. He got it sorted in a short time.