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To replace the thermostat in a 2003 Dodge Neon, first, disconnect the negative battery terminal and drain the coolant from the radiator. Remove the upper radiator hose connected to the thermostat housing, then unbolt and remove the thermostat housing to access the thermostat. Replace the old thermostat with the new one, ensuring the gasket is properly seated, then reassemble everything by reversing the steps, refill the coolant, and reconnect the battery. Finally, start the engine and check for leaks.

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1mo ago

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