How do you replace drive belt 1989 Nissan 240sx?

To replace the drive belt on a 1989 Nissan 240SX, first, disconnect the negative battery terminal for safety. Then, locate the belt tensioner and relieve tension by using a wrench to turn it, allowing you to remove the old belt. Route the new belt according to the belt diagram typically found on a sticker near the radiator or in the engine bay. Finally, ensure the belt is properly seated on all pulleys, reapply tension, and reconnect the battery.