If key functionality changes, I have a right to refund under Austalian consumer law. If the new owners refused to comply, they'd end up being barred from tradin

If key functionality changes, I have a right to refund under Austalian consumer law. If the new owners refused to comply, they'd end up being barred from trading in Australia. Regardless - even in this fairly far fetched reality - as you said the "car runs fine", but the GO was refering to the car "ceasing to function".