do you have to replace rack and pinion pump and pressure line if you loose power on 2003 Ford Taurus

why cant i replace only one thing on this area if the flouid spirts out of the pressure cap after the car turns off and the price i got for this was 558.04 for parts and772.20 for labor and cant i fix it myself?? and start with the cheapest part

Asked by for the 2003 Ford Taurus
Do you have a full set of metric box wrenches (long & short) , crows foot wrenches , line wrenches, jack and jack stands , air compressor 1/2 &3/8 drive air tools drain pan, alignment rack screwdrivers channel locks, torx (internal& external) and a pressure guage with adapters and any other random item I'm missing ? then yes you CAN do it yourself! From your description you need a steering rack fluid spurting out of the reservoir is only the symptom , not the CAUSE. Good luck!!
2 more answers
If there is no power and you are losing pressure from the need another pump.
if you never done this before i would let a repair shop do it