OEX Alternator 12V 120A Denso Style DXA523

The OEX DXA523 is a new 12V, 120A alternator in Denso style configuration, supplied as an each unit for rotating electrical replacement work. It features an internal regulator, a single-leg alternator mount, and an AA pulley section, so the key installation checks are voltage, amperage, mounting style, and pulley arrangement before ordering.

This unit carries a part number of DXA523, with a mount leg thickness of 58mm, a pivot hole diameter of 10mm, an adjusting hole diameter of M8 x 1.25, and a mount centre-to-centre measurement of 169mm. Those dimensions matter because alternators can look similar externally while differing in bracket spacing, hole sizes, or pulley setup.

OEX lists this alternator as suited to Denso unit make applications, with a note that it can use DXA524 by changing the pulley and that an adaptor is available to suit HXK-26 and HXK-16. If you are replacing an original alternator, the most reliable check is to compare the part number, regulator type, mount layout, and the stated shaft dimension of 17 against the unit being removed.

Key Features

• New alternator, not remanufactured
• 12V system with 120A output
• Internal regulator
• Single-leg alternator mount
• Denso style application
• AA pulley section

Specifications

• Brand: OEX
• Product type: Alternator
• Unit of measure: Each
• Voltage: 12V
• Power rating: 120A
• Regulator type: Internal
• Mount type: Single leg
• New / remanufactured: New

Fitment and application notes

• Suits Denso unit make applications
• Listed applications include Hino 300 Series, Hino Dutro, Jaguar XJ, Ferrari 456 GT/GTA, Bitelli BB30, Mitsubishi Fuso Shogun/Heavy, Toyota Dyna, and several John Deere models
• John Deere applications shown include 4055, 4255, 4455, 4555, 4560, 4755, 4760, 4955, 4960, 550LC, 6101A, 855, 8560, 8570, 8760, 8770, 8870, 8960, 8970, and series 7000, 7010, 8000, 8010, 8020, 9000
• Fitment records also show year references against some applications, including 1988, 1989, 1990, 1991, 1992, 1993 to 2003, and selected 1995 to 2011 references across the listed vehicle and equipment families
• Where a model or year is shown, confirm the exact unit on the vehicle or machine before ordering

Application and Buying Notes

Before buying, compare the DXA523 part number, the Denso style housing, and the single-leg mount against the alternator currently fitted. The recorded mounting dimensions are practical checks: 58mm mount leg thickness, 10mm pivot hole diameter, M8 x 1.25 adjusting hole, and 169mm mount centre-to-centre.

The electrical rating is equally important. This alternator is 12V with a 120A output and an internal regulator, so it should only be considered where those details match the existing charging system specification. If the original unit has a different regulator arrangement or a different output requirement, the match should be reassessed before purchase.

Pulley details can affect installation and belt alignment. This unit has an 81mm outside diameter pulley with an AA section, and the supplied note states it can use DXA524 with a pulley change. That makes the pulley, shaft dimension of 17, and any bracket or adaptor requirement worth checking carefully against the original alternator.

The weight is listed at 7.12kg, which can be useful when handling or comparing assemblies during replacement. For mixed-fit applications across passenger, commercial, and equipment use, the safest approach is to verify the machine model, year where available, part number, and the physical mounting and pulley measurements before fitting.

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 DXA523 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, Mount Leg Thickness 58mm, Pivot Hole Diameter 10, Pulley Outside Diameter 81mm, Regulator Type Internal, Voltage 12, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Weight 7.12kg, Product Group 1 ROTATING ELECTRICAL, Part No. DXA523, Brand OEX, Description OEX Alternator 12V 120A Denso Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR7, Power Rating (Amp) 120, Pulley Section AA, Suits Unit Make Denso.

OEX Alternator 12V 120A Denso Style. Part number DXA523 should be checked first. Listed voltage is 12. Listed output rating is 120. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single 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 DXA523, 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.

Compatibility note: Confirm fitment by matching the part number DXA523, the Denso style application, and the listed mounting and pulley dimensions against the alternator being replaced. Do not rely on appearance alone, as similar-looking units can differ in regulator type, pulley section, shaft size, or bracket spacing.

FAQ

What is the part number for this alternator?

The part number is DXA523.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with a 120A power rating.

Does it use an internal regulator?

Yes. The regulator type is listed as internal.

What mounting and pulley details are listed?

The alternator has a single-leg mount, 58mm mount leg thickness, 10mm pivot hole diameter, M8 x 1.25 adjusting hole diameter, 169mm mount centre-to-centre, 81mm pulley outside diameter, and AA pulley section.

What should I check before ordering?

Check the part number, Denso style application, voltage, amperage, regulator type, mount layout, and pulley dimensions against the existing alternator. The fitment list includes multiple vehicle and equipment applications, so exact matching is important.