What is the spark plug firing order in a 2007 Lexus rx 350?

The spark plug firing order for the 2007 Lexus RX 350, which is equipped with a 3.5L V6 engine, is 1-2-3-4-5-6. This means that the cylinders fire in the sequence starting from cylinder 1 and moving through to cylinder 6. Typically, the cylinder layout is front to back, with cylinder 1 being on the passenger side.