OEX Alternator 12V 80A Hitachi Style HXA081

The OEX HXA081 is a new 12V alternator rated at 80A and described as Hitachi style, with an internal regulator and clockwise rotation. It is listed with a twin leg alternator mount, 82mm inside mounting legs, a 170mm mount centre-to-centre measurement, and an M8x1.25 adjusting hole. Those dimensions matter when comparing the replacement unit against the one already in the vehicle.

This alternator suits units made by Hitachi and carries part number HXA081. The pulley outside diameter is 82mm, the pulley section is B, the shaft dimension is 17, and the pivot hole diameter is 10mm. Weight is listed at 8.4kg, which can be useful when confirming you have the correct style of unit before ordering.

A specific note applies to this part: if a warning light will appear on the dash, use the supplied harness adapter inline. That makes it important to check the electrical connection and warning lamp arrangement before fitting, especially where the existing vehicle wiring differs from the original alternator setup.

Key Features

• New OEX alternator, not remanufactured
• 12V, 80A output
• Hitachi style unit
• Internal regulator
• Clockwise rotation
• Twin leg alternator mount

Specifications

• Brand: OEX
• Product type: Alternator
• Part No.: HXA081
• Voltage: 12V
• Power rating: 80A
• Regulator type: Internal
• Rotation: Clockwise (CW)
• Suits unit make: Hitachi

Fitment guidance

• Fitment is listed against HOLDEN, ISUZU and TCM applications.
• Recorded application groups include HOLDEN Jackaroo, HOLDEN Jackaroo / Monterey, HOLDEN Rodeo, ISUZU 4JB1, ISUZU Elf, ISUZU Journey, ISUZU MU, ISUZU N, TCM 820-2, TCM FHD20, TCM FHD25 and TCM FHD30.
• Sample application years shown in the fitment data include HOLDEN Jackaroo / Monterey 1992 to 1998, ISUZU 4JB1 1999, ISUZU Elf 1980 to 1991, and TCM 820-2 1991 to 1995.
• Because the listing only gives grouped fitment references, the exact vehicle match should still be checked against the alternator dimensions, mounting style and part number before purchase.

Application and Buying Notes

When comparing this alternator, start with the practical identifiers: HXA081, 12V, 80A, Hitachi style, internal regulator and clockwise rotation. Those details tell you the unit type and electrical setup, while the 82mm inside mounting legs, 170mm centre-to-centre mount and twin leg mounting style tell you whether it is physically similar to the existing alternator.

The pulley and shaft details also matter. This unit has an 82mm pulley outside diameter, B section pulley, 17mm shaft dimension and 10mm pivot hole diameter. If any of those measurements differ from the original unit, it may not be a direct replacement even if the vehicle name appears in the fitment listing.

The note about the warning light is important. If a warning light will appear on the dash, the supplied harness adapter needs to be used inline. That is a compatibility checkpoint rather than an optional extra, so wiring should be checked carefully before the alternator is installed.

Warranty cover is listed as 3 years for passenger use and 1 year for commercial use. That does not replace the need to confirm the correct application, but it does provide a useful buying reference once the part number, mounting style and electrical configuration have been matched properly.

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 HXA081 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 82mm, Pivot Hole Diameter 10, Pulley Outside Diameter 82mm, Regulator Type Internal, Suits Unit Make Hitachi, Note If warning light will appear on the dash, please use the supplied harness adapter inline., Mount Cnt to Cnt 170mm.

Additional published details for cross-checking include Shaft Dimension 17, Product Group 2 ALTERNATORS, Part No. HXA081, Brand OEX, Description OEX Alternator 12V 80A Hitachi Style - See Note, Adjusting Hole Diameter M8x1.25, Pin Code IR9, Power Rating (Amp) 80, Pulley Section B.

OEX Alternator 12V 80A Hitachi Style - See Note. Part number HXA081 should be checked first. Listed voltage is 12. Listed output rating is 80. 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 B. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA081, 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 12 and output 80 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include HOLDEN JACKAROO, HOLDEN JACKAROO / MONTEREY, HOLDEN JACKAROO / MONTEREY 1992, HOLDEN JACKAROO / MONTEREY 1993, ISUZU 4JB1, ISUZU 4JB1 1999. 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: Confirm fitment using part number HXA081, the 12V 80A Hitachi style specification, the twin leg mount measurements, and the warning-light harness adapter note before ordering or fitting.

FAQ

Is this alternator new or remanufactured?

It is listed as new.

What is the voltage and output rating?

The alternator is 12V and rated at 80A.

What type of regulator does it use?

It has an internal regulator.

What mounting style is listed?

It is listed as a twin leg alternator mount with 82mm inside mounting legs and 170mm mount centre-to-centre.

Does this part suit Hitachi units?

Yes. The listing states it suits unit make Hitachi and describes the alternator as Hitachi style.

What should be checked if the dash warning light may appear?

If a warning light will appear on the dash, the supplied harness adapter should be used inline.