Bank 1 is the side of the engine that contains cylinder 1. On the Nissan Titan's VK56DE 5.6L V8, cylinder 1 sits on the driver’s side when looking at the engine from the front, so Bank 1 corresponds to the left (driver) bank.
In V8 engine nomenclature, Bank 1 and Bank 2 are defined by which bank houses cylinder 1. For the Titan, Bank 1 holds cylinders 1–4 and Bank 2 holds cylinders 5–8. If you need to verify, consult the factory service manual or a reputable diagram; some model-year diagrams may label sides differently, so use cylinder 1 as the ultimate reference point.
Bank numbering and side orientation
When facing the engine from the front of the vehicle, Bank 1 on the VK56DE is the left-hand (driver-side) bank, containing cylinder 1 at the front of that bank. Bank 2 is on the right (passenger) side with cylinders 5–8.
Notes
Always verify with the official service manual for your exact year and market, since there can be small variations in labeling or diagrams across model years.
Summary
Bank 1 on the Nissan Titan is the driver-side bank, the side that contains cylinder 1. This aligns with the common convention that Bank 1 housess cylinders 1–4 in this engine family.