as above hicas system is over 10 years old and can be faulty and turn on/act at times it shouldn't, for example driving in a straight line then you feel the rear end is making you sway right or left, it can actilly be very dangerous, mate in his 180 has had this happen to him and he got a lock bar straight away, lock bar replaces the rack and blocked the hicas fluid lines, this is fine and works really good,