OEX Alternator 12V 90A Hitachi Style RXA071

The OEX RXA071 is a remanufactured 12V alternator rated at 90A and built in a Hitachi style configuration. It uses an internal regulator, a twin leg alternator mount, and a pulley outside diameter of 71mm with an AA pulley section, so the mounting and drive setup need to match the vehicle application before purchase.

This unit is listed with a part number of RXA071 and a pin code of IR49. Key dimensions include 83mm inside mounting legs, a 160mm mount centre-to-centre measurement, a 10mm pivot hole diameter, and an M8 x 1.25 adjusting hole diameter. Those measurements are the practical checks that matter when comparing against an existing alternator.

The alternator is a remanufactured OEX unit with a weight of 5.68kg and a warranty of 3 years for passenger use or 1 year for commercial use. It suits Hitachi unit applications and includes a note that an adaptor is required to suit HXK-32 and HXK-24, so the fitting arrangement should be confirmed carefully rather than assumed.

Key Features

• 12V, 90A alternator
• Remanufactured unit
• Internal regulator
• Twin leg alternator mount
• Pulley outside diameter 71mm
• AA pulley section

Specifications

• Brand: OEX
• Product type: Alternator
• Unit of measure: Each
• Voltage: 12V
• Power rating: 90A
• New / remanufactured: Remanufactured
• Suits unit make: Hitachi
• Alternator mount: Twin leg

Compatibility and fitment guidance

• Holden Colorado
• Holden Colorado 7
• Holden Jackaroo / Monterey
• Holden Rodeo
• Isuzu D-MAX
• Isuzu Wizard

Application and Buying Notes

Check the part number RXA071 first, then compare the alternator mount style, because this unit is a twin leg design with 83mm inside mounting legs and a 160mm mount centre-to-centre measurement. If those dimensions do not match the existing alternator or bracket layout, it is not the correct fit, even if the vehicle family appears similar.

The unit is specified as a 12V, 90A alternator with an internal regulator, so the electrical setup needs to align with the vehicle and charging system. A 71mm pulley with an AA section also means belt and pulley configuration should be checked against the current unit before ordering.

The note about adaptor requirements for HXK-32 and HXK-24 is important. If your current alternator uses one of those arrangements, confirm whether the adaptor is needed for your application and whether the mounting, pivot, and adjuster points line up correctly. Small differences in hole size, shaft dimension, or pulley section can stop a unit from fitting properly.

Fitment references are provided for Holden Colorado, Holden Colorado 7, Holden Jackaroo / Monterey, Holden Rodeo, Isuzu D-MAX, and Isuzu Wizard, but those names alone are not enough to confirm the correct alternator. Use the dimensions, regulator type, pulley details, and the RXA071 part number as the final check before purchase.

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 RXA071 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 83mm, Pivot Hole Diameter 10, Pulley Outside Diameter 71mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. Remanufactured.

Additional published details for cross-checking include Weight 5.68kg, Product Group 1 ROTATING ELECTRICAL, Part No. RXA071, Brand OEX, Description OEX Alternator 12V 90A Hitachi Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR49, Power Rating (Amp) 90, Pulley Section AA, Suits Unit Make Hitachi.

OEX Alternator 12V 90A Hitachi Style. Part number RXA071 should be checked first. Listed voltage is 12. Listed output rating is 90. 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 AA. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number RXA071, 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 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include HOLDEN COLORADO, HOLDEN COLORADO 2008, HOLDEN COLORADO 2009, HOLDEN COLORADO 2010, ISUZU D-MAX, ISUZU D-MAX 2007. 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.

The listed warranty is 3yr Passenger 1yr Commercial. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm fitment by matching RXA071, the Hitachi style application, and the listed mounting and pulley dimensions against the unit already in the vehicle. Do not rely on vehicle name alone; check the 12V 90A specification, twin leg mount, and adaptor note for HXK-32 and HXK-24 before ordering.

FAQ

Is this alternator new or remanufactured?

It is listed as remanufactured.

What voltage and output does this alternator have?

It is a 12V alternator rated at 90A.

What is the part number for this unit?

The part number is RXA071.

Does it use an internal regulator?

Yes. The regulator type is internal.

What mounting details should I check before buying?

Check the twin leg mount, 83mm inside mounting legs, 160mm mount centre-to-centre, 10mm pivot hole diameter, and M8 x 1.25 adjusting hole diameter.

Which applications are referenced for fitment?

Holden Colorado, Holden Colorado 7, Holden Jackaroo / Monterey, Holden Rodeo, Isuzu D-MAX, and Isuzu Wizard are referenced, but the listed dimensions and part number should still be matched to the vehicle.