This part is listed by BMW as BMW part number 32411094098 (32 41 1 094 098) and is described as a Meyle Power Steering Pump for E39 528i (1997, 1998).
All PS pumps wear and eventually fail, mostly due to running with low fluid level, dirty fluid, or overheating. Failing PS pumps generally get noisy, causing groaning sounds when turning the wheel. Once the pump fails it will leave your car undriveable without the benefit of power assistance.
This is a newly manufactured pump, not a rebuilt. There is no core charge.
This power steering pump is designed and engineered in Germany by Meyle to match or exceed the OEM part in every way. Meyle sees their products as an "OEM Premium" level of quality and value. Meyle emphasizes research, engineering, and testing even when reproducing an original design. Meyle parts are developed strictly in line with the guidelines and specifications of their own engineers in Hamburg, Germany and overseen and tested in the production process. Meyle parts are manufactured under ISO/TS 16949 standard, TUV approved, and have a four year warranty.
BMW Fitments:
5 Series
E39 (97-03) > 528i 97-98