OEX Alternator 12V 100A Hitachi Style HXA100

The OEX HXA100 is a new 12V alternator rated at 100A and made in a Hitachi style configuration. It is listed with a 6 groove pulley, internal regulator, twin leg alternator mount, and a pulley outside diameter of 63mm.

This unit is supplied as each and carries a 3 year passenger / 1 year commercial warranty. For buyers matching an existing alternator, the most important identifiers here are Part No. HXA100, 12 volt system voltage, 100 amp output, and Hitachi suit make.

Mounting dimensions are also clearly defined: inside mounting legs are 81mm, mount centre to centre is 157mm, and both the pivot hole diameter and adjusting hole diameter are 10.5mm. These details matter when checking whether the alternator will line up correctly on the vehicle.

Key Features

• New alternator, not remanufactured
• 12V, 100A output
• Hitachi style unit
• Internal regulator
• Twin leg alternator mount
• 6 groove pulley

Specifications

• Brand: OEX
• Part No.: HXA100
• Voltage: 12V
• Power rating: 100A
• Suits unit make: Hitachi
• Regulator type: Internal
• Alternator mount: Twin leg
• Pulley section: 6 groove

Fitment guidance

• NISSAN: ELGRAND, ELGRAND 1996, ELGRAND 1997, ELGRAND 1998, ELGRAND 1999, plus other listed applications

Application and Buying Notes

Check the part number first if you are replacing an existing unit. HXA100 is the clearest identifier here, alongside the 12V, 100A specification and Hitachi style design. If the original alternator uses a different mounting arrangement, pulley type, or regulator type, this unit may not be the correct match even if it looks similar at a glance.

Measure the mounting points before ordering. The listed inside mounting legs are 81mm, mount centre to centre is 157mm, and both the pivot hole diameter and adjusting hole diameter are 10.5mm. Those figures are often the difference between a straightforward replacement and one that needs further checking.

The pulley is a 6 groove design with a 63mm outside diameter. Belt profile and pulley size need to match the application, otherwise the belt may not align correctly or tension may not sit as intended. For a charging system replacement, keep the pulley section and mounting dimensions in view rather than relying on appearance alone.

This alternator uses an internal regulator and is described as a Hitachi style unit with a twin leg mount. That combination is useful information when comparing against the old part, but it is still important to confirm the vehicle application, belt layout, and connector arrangement before purchase. The weight is 4.94kg, which can also help when comparing against the removed unit.

Warranty cover is listed as 3 years for passenger use and 1 year for commercial use. When selecting a replacement, think about the duty cycle of the vehicle as well as the physical fit. A commercial application may place different demands on the charging system than a passenger vehicle, so it is worth checking the suitability of the part in that context.

OEX products are sourced from market leading original equipment manufacturers and aftermarket suppliers, and the factories are ISO9001 certified. Those details support the quality position of the range, but the practical match still comes back to the vehicle’s mounting dimensions, pulley section, regulator type, and part number. Confirm those details carefully before finalising the order.

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 HXA100 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 10.5, Pulley Outside Diameter 63mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 157mm, Weight 4.94kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. HXA100, Brand OEX, Description OEX Alternator 12V 100A Hitachi Style, Adjusting Hole Diameter 10.5, Pin Code IR49, Power Rating (Amp) 100, Pulley Section 6 Groove, Suits Unit Make Hitachi, Alternator Mount Twin Leg.

OEX Alternator 12V 100A Hitachi Style. Part number HXA100 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 HXA100, 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 using Part No. HXA100, the 12V 100A specification, Hitachi style application details, and the listed mounting and pulley measurements before ordering.

FAQ

What is the part number for this alternator?

The part number is HXA100.

What voltage and output does it have?

It is a 12V alternator with a 100A power rating.

Is this a new or remanufactured unit?

It is listed as new.

What pulley and mounting details are listed?

It has a 6 groove pulley, 63mm pulley outside diameter, twin leg alternator mount, 81mm inside mounting legs, 157mm mount centre to centre, and 10.5mm pivot and adjusting hole diameters.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What warranty is supplied?

The warranty is listed as 3 years for passenger use and 1 year for commercial use.