How to Add Coolant: Renault Megane (2002-2008) 2003 Click to view0:33See how to add engine coolant (antifreeze) to a 2003 Renault Megane Authentique 1 4 Cyl. Turbo Diesel. This free video also shows you how to mix the coolant with water on a 2003 Renault Megane Authentique 1 4 Cyl. Author: Braeger Chevy Videos of renault megane engine coolant Click to view on CarCareKiosk0:29Fix Coolant Leaks: 2002-2008 Renault MeganeCarCareKioskClick to view on CarCareKiosk0:33How to Add Coolant: Renault Megane (2002-2008)CarCareKioskClick to view on CarCareKiosk1:06Coolant Flush How-to: Renault Megane (2009-2015)CarCareKioskSee more videos of renault megane engine coolant Coolant Flush How-to: Renault Megane (2002-2008) 2003 Click to view0:35Adding engine coolant (also known as antifreeze) to your 2003 Renault Megane is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine Author: Braeger Ford Renault Megane Engine Cooling Parts - CARiD Overheating can cause an untimely breakdown and serious engine damage. Prevent it by servicing your Renault Megane with our replacement engine cooling parts.