The radiator transfers heat from engine coolant to passing air, keeping the engine in its safe operating range.
Hot coolant flows through aluminum tubes with bonded fins; air drawn through the core by the fan removes the heat.
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Replacement runs $450–$1400 including parts and 2-5 hours labor. Exact cost depends on vehicle, parts tier (OEM vs aftermarket), and local labor rate.
Expected lifespan is 80,000-150,000 miles. Driving conditions, climate, and maintenance affect real-world life.
Coolant leak; Overheating; Bent or clogged fins; Brown coolant (internal corrosion); Sweet coolant smell.
Most modern radiators are sealed units that get replaced rather than rebuilt. A shop will diagnose, confirm with a load or output test, then swap the unit and verify operation.
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