Package: OE# 1xDR-3Z8566-A; 2xBC3Z-8590-F.
One O-ring used in "T-Connector" where it connects to the thermostat and water pump. Two O-rings used in upper and lower radiator hose quick connectors.
These O-rings in coolant quick connectors become flattened over time and must be replaced. It is a very common issue.
Designed to be tight fit, fix Ford F-150 radiator hose coolant leak problem
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