The BMW 2002 Heater Core transforms engine heat into warm air that keeps your cabin cozy and windshield clear. The Heater Core is located beneath the dash and acts like a small radiator, drawing in hot coolant through hoses propelled by the water pump. The blower pushes air over the finned aluminum or brass Heater Core, which then sends heated air through the vents. Early 2002 models applied a simple cable-operated valve to meter the flow of coolant, while the later cars adopted a blend door style system that mixed cooled and heated air for more steady temperature control. However, both styles are still very much dependent on the same basic Heater Core. In air-conditioned versions, the evaporator coils cool and dry the airflow first. This air then passes through the Heater Core to take the edge off humidity and climate to help keep the glass clear on frosty mornings. The small auxiliary radiator function of the core helps control engine temperatures at heavier loads. Clogs, leaks, or corrosion can rob a BMW driver of heat, and a replacement requires a significant teardown of the dashboard, so clean coolant and timely flushes keep the Heater Core healthy across every BMW 2002 variant.
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