OEX Alternator 12V 70A Hitachi Style HXA025

The OEX Alternator HXA025 is a 12V, 70A unit in Hitachi style, supplied new and built with an internal regulator. It is listed with a 5 groove pulley, a 59mm pulley outside diameter, and a twin leg alternator mount, so the physical mounting and drive details need to match the vehicle before purchase.

This alternator is identified as Part No. HXA025 and is specified with an 81mm inside mounting leg measurement, 175mm mount centre to centre, and an M8 x 1.25 adjusting hole diameter. Those dimensions are the key checkpoints when comparing against the existing unit, especially where the original alternator has the same Hitachi-style layout.

OEX states its products are sourced from Original Equipment Manufacturers and aftermarket suppliers, with factories that are ISO9001 certified to support engineering, testing, and quality control procedures. For buyers, the most important point remains correct fitment: voltage, amperage, mount style, pulley section, and mounting dimensions all need to line up with the application.

Key Features

• 12V alternator rated at 70A
• Hitachi style unit
• Internal regulator
• New unit, not remanufactured
• 5 groove pulley
• Twin leg alternator mount

Specifications

• Voltage: 12V
• Power rating: 70A
• Regulator type: Internal
• Pulley outside diameter: 59mm
• Pulley section: 5 groove
• Alternator mount: Twin leg
• Inside mounting legs: 81mm
• Mount centre to centre: 175mm

Fitment information supplied

• Suits unit make: Hitachi

Application and Buying Notes

Before ordering, compare the alternator currently fitted to the vehicle with the HXA025 measurements: 12V system voltage, 70A output, 81mm inside mounting legs, 175mm mount centre to centre, 8mm pivot hole diameter, and M8 x 1.25 adjusting hole. Those details are the practical fitment checks that matter most when replacing a Hitachi-style alternator.

The pulley specification also matters. This unit has a 59mm outside diameter pulley with a 5 groove section, so the belt style on the vehicle must match. If the pulley section or mount layout is different, the alternator may not suit even if the electrical rating looks close.

Because this is an internal regulator alternator, it should only be used where that regulator type is appropriate for the vehicle’s charging system. Matching the alternator brand style alone is not enough; the application, mounting pattern, pulley arrangement, and regulator setup all need to align with the existing unit.

The listed weight is 5.3kg, which can be useful when comparing to a removed alternator or confirming you are dealing with the same general unit type. If there is any doubt, compare the part number HXA025 and the physical dimensions side by side with the old alternator before fitting.

OEX backs this product with a 3 year passenger and 1 year commercial warranty, but warranty coverage does not replace fitment checking. Confirming the correct application first is the safest way to avoid delays, returns, or charging-system mismatches once the part arrives.

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 HXA025 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 81mm, Pivot Hole Diameter 8, Pulley Outside Diameter 59mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 175mm, Weight 5.3kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. HXA025, Brand OEX, Description OEX Alternator 12V 70A Hitachi Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR4, Power Rating (Amp) 70, Pulley Section 5 Groove, Suits Unit Make Hitachi, Alternator Mount Twin Leg.

OEX Alternator 12V 70A Hitachi Style. Part number HXA025 should be checked first. Listed voltage is 12. Listed output rating is 70. 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 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA025, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include SUBARU LEGACY, SUBARU LEGACY 1989, SUBARU LEGACY 1990, SUBARU LEGACY 1991. 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: Please confirm compatibility by checking the part number HXA025, the Hitachi style application, the 12V 70A rating, and the mounting and pulley dimensions against the original alternator before ordering.

FAQ

What is the part number for this alternator?

The part number supplied is HXA025.

What voltage and output does it have?

It is a 12V alternator rated at 70A.

Is the regulator internal or external?

This alternator has an internal regulator.

What type of pulley does it use?

It has a 5 groove pulley with a 59mm outside diameter.

What mounting details should I check before buying?

Check the twin leg mount, 81mm inside mounting legs, 175mm mount centre to centre, 8mm pivot hole diameter, and M8 x 1.25 adjusting hole diameter against the existing unit.

What warranty is listed for this alternator?

The listed warranty is 3 year passenger and 1 year commercial.