* 2.4L I4: This engine only has four cylinders in a single row. They are numbered 1-4 from the timing chain/belt end to the other end. So, #4 would be the furthest cylinder from the timing components.
* 3.5L V6: This engine has six cylinders arranged in a V-shape. The firing order and exact location of cylinder 4 relative to the engine's orientation would require a detailed engine diagram. It is generally not easily identified visually without removing components.
To be sure, you'd need to consult a repair manual specific to your vehicle's engine (2.4L or 3.5L).
