Toyota 4.0 V6 1GR-FE Firing Order Diagram

Reading the 4.0L 1GR-FE V6 diagram correctly

Bank 1 is 1-3-5 and Bank 2 is 2-4-6, with each bank numbered from the front/timing-chain end toward the transmission; on common left-hand-drive longitudinal installations Bank 1 is the passenger/right bank. Read the vehicle as installed and use the manufacturer's left/right convention, not the side from which you happen to be standing. The first cylinder listed in 1-2-3-4-5-6 begins the sequence but does not define a universal connector position.

Toyota's 1GR-FE engine service data explicitly lists the 1-2-3-4-5-6 firing order. The notation appears sequential, but consecutive combustion events alternate between the odd- and even-numbered cylinder banks. Bank 1 is defined by cylinder 1, not universally by the driver's seating position. Identify the timing-chain end and engine code before interpreting a scan-tool cylinder or A/F-sensor bank fault. On coil-on-plug engines, use the diagram for cylinder identity and diagnosis; the PCM, not a physical distributor cap, schedules spark.

Which 4.0L 1GR-FE V6 firing order applies?

Toyota's 1GR-FE engine service data explicitly lists the 1-2-3-4-5-6 firing order. The notation appears sequential, but consecutive combustion events alternate between the odd- and even-numbered cylinder banks. This distinction matters because the engine can look nearly identical from above. Treat the camshaft or engine assembly as the authority when parts have been mixed. A firing order cast into an intake, copied from a generic decal, or remembered from another V8 is not enough to identify a modified engine.

The application table separates the order, cylinder banks, and ignition-system notes. Read all columns before routing. The first number in 1-2-3-4-5-6 is cylinder 1, but the physical No. 1 terminal can appear in different clock positions when a distributor has been installed on a different gear tooth.

Bank numbering and verification on the 4.0L 1GR-FE V6

Bank 1 is defined by cylinder 1, not universally by the driver's seating position. Identify the timing-chain end and engine code before interpreting a scan-tool cylinder or A/F-sensor bank fault.

Toyota's 1GR-FE engine service data explicitly lists the 1-2-3-4-5-6 firing order. The notation appears sequential, but consecutive combustion events alternate between the odd- and even-numbered cylinder banks.

Procedures used with this specification

These steps are the same for every vehicle in this family, so they are documented once rather than repeated on each page. The values above remain specific to this Toyota 4.0L 1GR-FE V6.