The 2007 Lexus ES 350 uses a 3.5-liter V6 engine (Toyota’s 2GR-FE). Its firing order is 1-2-3-4-5-6, with Bank 1 cylinders 1, 3, and 5 and Bank 2 cylinders 2, 4, and 6.
Engine layout and why the order matters
Understanding the firing order is essential for correct ignition timing, spark plug replacement, and diagnosing misfires. The ES 350’s 2GR-FE V6 features two banks of three cylinders arranged in a conventional V configuration, which requires a precise firing sequence to maintain smooth operation and balanced exhaust and intake cycles.
Cylinder numbering on the 2GR-FE
On the 2GR-FE used in the ES 350, Bank 1 comprises cylinders 1, 3, and 5, while Bank 2 comprises cylinders 2, 4, and 6. This numbering scheme is the reference for ignition timing and service procedures.
Firing order and cylinder mapping
Before listing the order, note how the cylinders are arranged so you can reference service manuals or timing diagrams accurately. The standard sequence for this engine is:
- Firing order: 1-2-3-4-5-6
- Cylinder numbering: Bank 1 = 1, 3, 5; Bank 2 = 2, 4, 6
Knowing the firing order and cylinder map helps technicians align timing marks, install spark plugs, and diagnose misfires on the V6 drivetrain.
Summary
For the 2007 Lexus ES 350, the 3.5L V6 (2GR-FE) uses a firing order of 1-2-3-4-5-6, with Bank 1 consisting of cylinders 1, 3, and 5 and Bank 2 consisting of cylinders 2, 4, and 6. Always refer to the official factory service manual for detailed timing diagrams and VIN-specific procedures.