reason for replace a joint boot
Does a broken join boot will be responsible for a power steering fluid liq?
Second generation (E30) BMW 3 Series and the final 3 Series to sport the boxy '80s styling similar to the E32 7 Series and E34 5 Series.
No it does not. If you have a leak of power steering it is usually caused by as failed gasket/O-ring in the system, like the steering gear, the pump, or any of the hose. The boot is there to protect the rack and pinion gear from debris entering the the steering gear. You can download the suspension and steering part of a repair manual from here. Good Luck