The pump pressurizes power steering fluid so the steering rack can boost your input. Found mostly on cars built before about 2015.
Why It Matters
Driving with a failing pump damages the steering rack, a much more expensive part.
How to Save Money on Power Steering Pump Replacement
Replace the high-pressure hose at the same time if it's original, it's often the source of leaks
Many newer cars have electric power steering with no pump at all
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