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The 2009 Nissan Sentra is equipped with ZerexBlue 50/50 antifreeze engine coolant which holds around 10 quarts. This coolant helps in preventing engine damage by regulating heat and safeguards various engine components. To have the coolant changed in your Sentra, it typically costs between $70 and $80. It is recommended to get a coolant change every 30,000 miles. If you notice consistent high temperatures on the temperature gauge or frequent engine overheating, these are signs that a coolant flush is necessary to prevent more severe and expensive issues down the road.
Phosphate-based organic acid technology is the preferred coolant choice for the 2009 Nissan Sentra, with the blue extended life variant being the recommended option.