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To install a heater coil in a 2003 Lexus GS300, first, ensure the vehicle is turned off and the battery is disconnected. Remove the dashboard and any necessary components to access the heater core, including the heater hoses connected to it. Replace the old heater core with the new one, reattach the hoses, and reassemble the dashboard. Finally, refill the coolant, check for leaks, and reconnect the battery.

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2mo ago

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