Where do you put coolant into a 1998 740i BMW?

To add coolant to a 1998 BMW 740i, locate the coolant reservoir, which is typically found near the front of the engine bay on the driver's side. Remove the cap from the reservoir, and pour in the appropriate coolant mixture, ensuring you do not overfill it. Always check the engine temperature and allow it to cool before adding coolant to prevent any injuries or damage. After refilling, replace the cap securely.