OEX Alternator 24V 40A Nikko Style NXA604

The OEX Alternator NXA604 is a new 24V, 40A unit in Nikko style, supplied as each and identified for fitment checking by part number. It uses an internal regulator, twin leg alternator mount, and a BB pulley section, so the mounting style and electrical setup are clearly defined before purchase.

Key dimensions on this alternator include 72mm inside mounting legs, 200mm mount centre to centre, a 15mm pivot hole diameter, a 13mm adjusting hole diameter, and an 82mm pulley outside diameter. Those measurements matter when you are comparing the unit against the original alternator on the vehicle or equipment.

This unit is listed as new and weighs 7.04kg. The stated application reference is for Nikko units, and the supplied fitment data points to a number of Isuzu series applications, so it is important to confirm the exact part number and physical dimensions before ordering.

Key Features

• 24V alternator with 40A power rating
• Nikko style unit
• Internal regulator
• Twin leg alternator mount
• New unit
• BB pulley section

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 24V
• Amperage: 40A
• Part No.: NXA604
• Suits unit make: Nikko
• Alternator mount: Twin leg
• Regulator type: Internal

Fitment guidance

• Fitment references supplied for Isuzu applications, including C/E Series, F, F/J Series, Forward F, Journey, L Series, and S/V Series.
• Sample fitment references include Isuzu C/E Series 1990, 1991, 1992, 1993, and 1994.
• The supplied fitment data also shows Isuzu F references across model years including 1984 through 1988 in the previewed applications.
• Fitment is tied to the Nikko-style application and should be confirmed against the vehicle’s original alternator, mounting pattern, and part number before purchase.

Application and Buying Notes

Before ordering, compare the part number NXA604 with the original unit and check that the vehicle or equipment uses a 24V charging system with a 40A alternator. Matching voltage is essential, and this unit is not a general substitute for lower-voltage or higher-output systems.

The mounting measurements are specific: 72mm inside mounting legs, 200mm mount centre to centre, 15mm pivot hole diameter, and 13mm adjusting hole diameter. If any of those points differ from the existing alternator, the unit may not line up correctly even if the style looks similar.

The pulley details also matter. This alternator has an 82mm pulley outside diameter and a BB pulley section, so the belt type and pulley profile need to be checked against the existing setup. A mismatch here can affect belt alignment and installation.

This is an internal regulator alternator, so it suits applications designed for that arrangement. If the vehicle uses an external regulator or a different charging layout, confirm the electrical compatibility before fitting. The unit is listed as new and weighs 7.04kg, which can also help when comparing it with the removed part.

The supplied application references point to several Isuzu series, but series names alone are not enough to confirm fitment. Always use the part number, regulator type, mount style, and physical dimensions together, especially on commercial vehicles where alternator variants can differ within the same series.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number NXA604 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty 3yr Passenger 1yr Commercial, Inside Mounting Legs 72mm, Pivot Hole Diameter 15, Pulley Outside Diameter 82mm, Regulator Type Internal, Voltage 24, Mount Cnt to Cnt 200mm, Weight 7.04kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. NXA604, Brand OEX, Description OEX Alternator 24V 40A Nikko Style, Adjusting Hole Diameter 13, Pin Code IR37, Power Rating (Amp) 40, Pulley Section BB, Suits Unit Make Nikko, Alternator Mount Twin Leg.

OEX Alternator 24V 40A Nikko Style. Part number NXA604 should be checked first. Listed voltage is 24. Listed output rating is 40. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Pulley configuration is BB. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number NXA604, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 and output 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ISUZU C/E SERIES, ISUZU C/E SERIES 1990, ISUZU C/E SERIES 1991, ISUZU C/E SERIES 1992. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Please confirm fitment by matching part number NXA604, the 24V 40A specification, Nikko style application, internal regulator type, and the listed mounting and pulley measurements against the vehicle’s original alternator.

FAQ

What is the part number for this alternator?

The part number is NXA604.

What voltage and amperage does it have?

It is a 24V alternator with a 40A power rating.

Is this alternator new or remanufactured?

It is listed as new.

What type of regulator does it use?

It uses an internal regulator.

What mounting and pulley measurements are listed?

The listed measurements are 72mm inside mounting legs, 200mm mount centre to centre, 15mm pivot hole diameter, 13mm adjusting hole diameter, and an 82mm pulley outside diameter with BB pulley section.

What warranty is listed?

The listed warranty is 3yr Passenger and 1yr Commercial.