OEX Alternator 12V 100A Hitachi Style RXA073

The OEX Alternator RXA073 is a 12V, 100A remanufactured alternator in Hitachi style, supplied as an each unit for rotating electrical applications. It uses an internal regulator, a twin leg alternator mount, and a 6 groove pulley, with the pulley outside diameter listed at 63mm.

Key mounting dimensions matter on this unit: inside mounting legs are 82mm, mount centre to centre is 157mm, and both the pivot hole diameter and adjusting hole diameter are 10mm. These figures are important when matching an alternator to the vehicle bracket and belt drive arrangement.

The unit is noted as suitable for Hitachi applications and includes an adaptor to suit HXK-32 and HXK-24. As with any alternator selection, the part number RXA073 and the physical mounting measurements should be checked against the original unit before purchase.

Key Features

• 12V alternator with 100A power rating
• Remanufactured unit
• Internal regulator
• Twin leg alternator mount
• 6 groove pulley
• Adaptor to suit HXK-32 and HXK-24

Specifications

• Brand: OEX
• Product type: Alternator
• Part No.: RXA073
• Voltage: 12V
• Power rating: 100A
• Regulator type: Internal
• Alternator mount: Twin leg
• Pulley section: 6 groove

Fitment and application checks

• Suits unit make: Hitachi
• Adaptor to suit HXK-32 and HXK-24
• Fitment data supplied includes Nissan applications such as Bluebird, Navara, Pathfinder, Primera, Pulsar and Serena
• The supplied fitment preview includes Nissan Bluebird years 1991 to 1996 and Nissan Navara years 2002 to 2005

Application and Buying Notes

Before ordering, compare the alternator part number RXA073, the Hitachi style application, and the mounting measurements of 82mm inside mounting legs, 157mm mount centre to centre, and 10mm pivot and adjusting holes. These dimensions need to line up with the original unit and bracket arrangement for the alternator to install correctly.

The 100A output and internal regulator make this a specific electrical match, so the original charging system specification should be checked rather than relying on appearance alone. The 6 groove pulley and 63mm pulley outside diameter also need to suit the belt setup already on the vehicle.

This unit is remanufactured, not new, and carries a 3yr Passenger / 1yr Commercial warranty. For commercial use, the shorter warranty period should be taken into account when comparing replacement options and maintenance expectations.

The note to suit HXK-32 and HXK-24 is useful, but it should be treated as a compatibility checkpoint rather than a blanket guarantee. Confirm the original alternator, connector arrangement, and mount style before fitting, especially where a vehicle may have had previous repairs or aftermarket changes.

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 RXA073 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 63mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. Remanufactured.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. RXA073, Brand OEX, Description OEX Alternator 12V 100A Hitachi Style, Adjusting Hole Diameter 10, Pin Code IR49, Power Rating (Amp) 100, Pulley Section 6 Groove, Suits Unit Make Hitachi.

OEX Alternator 12V 100A Hitachi Style. Part number RXA073 should be checked first. Listed voltage is 12. Listed output rating is 100. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number RXA073, 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 100 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching the part number RXA073, the Hitachi style application, and the listed mounting and pulley dimensions against the original alternator before purchase. Where the vehicle has been modified or the charging system has been changed previously, check the adaptor requirement and physical fit carefully.

FAQ

What is the part number for this alternator?

The part number listed is RXA073. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured alternator?

It is listed as remanufactured. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 100A power rating. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.

What belt and pulley details are listed?

It has a 6 groove pulley with a 63mm outside diameter. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.

What warranty is listed?

The listed warranty is 3yr Passenger and 1yr Commercial. For this listing, part number RXA073 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN BLUEBIRD, NISSAN BLUEBIRD 1991, NISSAN BLUEBIRD 1992. These details should still be checked against the original unit before ordering.