V6 ATX Water pump PW-284. Replace if your water pump has more than 100K miles on it.  A leaking water pump will cause the crank position sensor to fail, causing a difficult-to-diagnose intermittent no-start.

 

This pump includes a new pump, housing, housing-to-inlet pipe gasket, (but no inlet pipe) one V6 Water Pump-to-block O-ring E9DZ-8513-B, and ONE V6 Water Pump Supply Tube O-ring E9DZ-8563-A, all in the box.