The firing order for the 3.3-liter VG33E V6 used in older Nissan Frontier models is 1-4-2-5-3-6.
In this article, we explain what that firing order means, which engines it applies to, and how to verify it on your vehicle. The order describes the sequence in which each spark plug receives a spark, helping the engine run smoothly and balanced across all six cylinders. Variations can occur across model years or revisions of the VG33 family, so always confirm with your vehicle's service manual if you're unsure.
What the firing order means
The firing order is the order in which the engine's spark plugs ignite each cylinder. For a six-cylinder V6 like the VG33E, choosing the right sequence helps balance rotational forces and minimize vibrations, while aligning with the crankshaft's rotation and distributor timing. The documented sequence for the 3.3 Frontier is as follows.
Firing sequence
Below is the sequence in which cylinders receive spark for the VG33E 3.3L V6 commonly found in the Frontier (and related models):
- Cylinder 1
- Cylinder 4
- Cylinder 2
- Cylinder 5
- Cylinder 3
- Cylinder 6
Following this order ensures proper ignition timing across all six cylinders, contributing to smooth idle, power delivery, and engine longevity.
Important notes and verification
Engine designations can vary slightly by model year or market. Some VG33 revisions (such as later VG33ER variants) or different Nissan platforms may use the same firing order but with minor distributor or sensor differences. Always consult the official service manual for your exact vehicle year, VIN, and engine code to confirm the correct firing order and timing procedure before performing maintenance or repairs.
Summary
The 3.3 Frontier's VG33E V6 fires in the sequence 1-4-2-5-3-6. This ordering is standard for the VG33E used in many 1997–2004 Frontier and Pathfinder models, but users should verify against their specific factory manual to account for any revisions or model-year differences.