you mean ABS? check first page in setup garage .. under electronic systems... dificulty aids and electronic systems of a car are now separate settings ....
not 100% sure but I recall Renato saying it is the same for now ... I think in my Automobilista things you might miss/ tips thread ... it just presseted for car based on real life (if car has that system it is available in garage)
You can disable it but for the best realistic experience leave it on. This is a factory setting, in real life the MINI Challenge runs with ABS on as well.
The car handling without ABS isn't correct with tyres continously locking up. This vehicle is the exception of the rule to turn all driving aids off: MINI ABS.