What cylinder is no 4 on a Chrysler 3.8 V6?

On a Chrysler 3.8L V6 engine, the firing order is typically 1-6-5-4-3-2. Therefore, cylinder #4 is located in the rear bank, on the passenger side (right side in North America). It's important to note that while the firing order is consistent, the exact physical location might vary slightly depending on the specific year and model of the vehicle. A diagram in your vehicle's repair manual will show the precise location.