To find it definitively, you should:
* Consult your owner's manual: This is the best resource for the specific location in your vehicle.
* Use a repair manual (like a Chilton's or Haynes): These manuals have diagrams showing the location of all components, including the ignition coil.
* Look online for a diagram: Search for "[Your Durango's engine size] Dodge Durango ignition coil location" on Google Images or YouTube. This may provide a visual reference.
Remember to be cautious when working near the engine. The engine may be hot, and there are potentially dangerous electrical components.