What is the firing order for a 2009 Kia Rio?

The firing order for a 2009 Kia Rio, which has a 1.6-liter inline-4 engine, is 1-3-4-2. This means that the cylinders fire in the sequence of cylinder 1, followed by cylinder 3, then 4, and finally cylinder 2. This order is crucial for proper engine operation and performance.