Water pump replacement in Philadelphia, PA typically costs $400–$900 as a US independent-shop average. Labor varies with pump drive type — serpentine-belt-driven pumps take less labor than timing-belt-driven ones — so the range is carried whole, never averaged to a point. A green puddle under the car usually points here — it is coolant from the cooling system, not transmission fluid.
Typical in Philadelphia, PA: water pump replacement $400–$900 (US independent-shop average).
Coolant loss, overheating, or a whine from the pump area — book service promptly; overheating turns a pump job into an engine job.
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Data by Servik — verified local pros from official license records and public sources. Cost figures are typical ranges, not quotes; a pro's written estimate is the real number.