To replace a battery in a Volkswagen Amarok, start by locating the battery, which is typically found in the engine compartment. Disconnect the negative (-) terminal first, followed by the positive (+) terminal. Remove any retaining brackets or clamps holding the battery in place, then carefully lift the old battery out. Install the new battery in the correct orientation, ensuring a snug fit, and reconnect the positive (+) terminal first, followed by the negative (-) terminal. Regularly inspecting and replacing a worn or failing battery helps prevent starting issues and electrical system malfunctions.