With my car I changed the brake hoses the other day. I had the suspicion that a brake pliers with longer driving gaaaaanz easily start to clamp. Heist so much, that a bolt on the pliers was not smooth or its socket latched out. However, if I brake sharply, immediately on the right side starts to regulate the ABS. Or did it move through the broken hose there ev. what?! P.S: Before changing the hoses she left the one only with a brake piston without a brake hose, I could push the brake piston in with 2 fingers. So still exchange the brake tongs?