Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? On average, a water heater lasts 8 to 12 years. Maybe even more than that if you've ...

The heater core is a small radiator that warms the car’s cabin using hot coolant from the engine. The cooling system’s hoses circulate liquid coolant through the heater core as they do through the ...