How do you replace radiator top hose Mazda 626?

To replace the radiator top hose on a Mazda 626, first ensure the engine is cool and disconnect the negative battery terminal for safety. Loosen the hose clamps at both ends of the top hose using a screwdriver or socket wrench, then carefully remove the hose from the radiator and engine. Install the new hose by sliding it onto the radiator and engine connections, securing it with the clamps. Finally, refill the radiator with coolant, start the engine to check for leaks, and ensure proper operation.