Q: How to replace a Radiator fan in a Nissan Altima?A: First of all, remove the front air inlet duct on four-cylinder models, and the Transmission Control Module on V6 models. Remove the battery and tray on the V6 models. Disconnect the upper radiator hose and the fan's electrical connectors. To replace the radiator fan, remove the fan blade and the screws holding the motor to the fan shroud. Remove the motor. Refill the cooling system, reconnect the battery, and perform re-learn procedures.