If your power steering pump is going out, your car will be stiff and harder to maneuver especially at low speeds. We recommend replacing your pump as soon as symptoms arise to avoid complications in the rest of your steering system, mainly the rack, caused by lack of fluid and presssure.

This is an OEM Bosch power steering pump. If your pump is going out, your steering will be adversely affected, especially at lower speeds. Your steering will become stiff and give you less ease of control of the vehicle. Eventually the rest of the steering system will begin to be damaged due to a lack of fluid and pressure.
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Rebuilt to exact OE standards, this unit from Bosch eliminates power steering whine and heavy wheel effort while maintaining genuine BMW driving dynamics.