PS...as in power steering pump? Mine went bad a week after I bought my 520i. (Oh man, try driving an E34 with no power steering AT ALL, and 225/45 R18 tires!!!! It felt like I was pulling a truck!) The shaft broke and you could see about 1.5" of it already. Well, considering I bought a 15 year old car... not bad. I hope my new part will last that long as well.It was a simple job... lift, unbolt, replace leaking PS hose, bolt on new part, fluid, bleed... done.
Whole thing took about 3 hours in the shop.