I pulled up and noticed I have hydrolic fluid leaking from rear end (back)passenger side near rear wheel. underneath there is a spring (shock absorber) which joins to a large mushroom shaped object which then connects to the strut which connects to the wheel (sorry about the NON technical terminology). it is the actual mushroom shaped piece that is leaking. I don't know what is called but there is one et both sides of back wheels and both have a mini bore pipe running in to them. it is only leaking at one side, theres quite a loss of fluid, theres no warning lights on dash and power steering is still present, also the back suspension has dropped a fair bit but still raises when I turn keys in ignition, could anyone please tell me if this is a big and expensive job or an easy fix and what the name of faulty part any advice welcome and appreciated thanks