OEX Alternator 12V 90A Hitachi Style HXA028

The OEX Alternator 12V 90A Hitachi Style, part number HXA028, is a new rotating electrical unit with an internal regulator and a 4 groove pulley. It is listed as a 12 volt, 90 amp alternator with a twin leg mount arrangement, so the physical mounting and electrical setup need to match the vehicle application before fitting.

Key dimensions include 82 mm inside mounting legs, 175 mm mount centre to centre, an 8 mm pivot hole diameter, and an M8x1.25 adjusting hole. The pulley outside diameter is 65 mm, and the unit weighs 5.02 kg, which are useful checks when comparing against the existing alternator.

This alternator is described as Hitachi style and suits Hitachi units. It is supplied as an each item and carries a 3 year passenger / 1 year commercial warranty, so it is intended for buyers who want a new replacement rather than a remanufactured unit.

Key Features

• New alternator, not remanufactured
• 12 volt, 90 amp output
• Internal regulator
• 4 groove pulley
• Twin leg mount
• Hitachi style replacement

Specifications

• Brand: OEX
• Part number: HXA028
• Product type: Alternator
• Voltage: 12V
• Power rating: 90A
• Unit of measure: Each
• New / remanufactured: New
• Regulator type: Internal

Fitment guidance

• Fitment is listed against Nissan applications, including Cedric, Homy, Maxima, Maxima / Maxima QX, and Patrol.
• The fitment preview includes Nissan Cedric model years 1991, 1992, 1993, 1994, and 1995.
• The fitment preview includes Nissan Homy model years 1990, 1991, 1992, 1993, and 1994.

Application and Buying Notes

Before ordering, compare the part number HXA028 with the alternator you are replacing, then check the mounting layout carefully. The key physical identifiers here are the twin leg mount, 82 mm inside mounting legs, 175 mm centre to centre mounting, 8 mm pivot hole diameter, and M8x1.25 adjusting hole, all of which need to line up with the vehicle brackets and adjuster hardware.

The electrical specification is 12V and 90A with an internal regulator, so it should be matched to the vehicle’s charging system rather than judged by appearance alone. The 4 groove pulley and 65 mm pulley outside diameter are also important, because pulley section and size must suit the belt arrangement already on the vehicle.

If you are replacing a Hitachi alternator, check the existing unit for the same style, mount type, and pulley arrangement. A replacement can look similar yet differ in mount spacing, regulator type, or pulley section, so confirming the original alternator details is the safest way to avoid an incorrect purchase.

For buyers comparing options, the weight of 5.02 kg and the listed application data provide extra reference points, but they should be used alongside the physical dimensions and part number. The warranty is 3 year passenger / 1 year commercial, which is useful to know, but it does not replace the need to verify compatibility before installation.

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 HXA028 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 8, Pulley Outside Diameter 65mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 175mm, Weight 5.02kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. HXA028, Brand OEX, Description OEX Alternator 12V 90A Hitachi Style, Adjusting Hole Diameter M8x1.25, Pin Code IR49, Power Rating (Amp) 90, Pulley Section 4 Groove, Suits Unit Make Hitachi, Alternator Mount Twin Leg.

OEX Alternator 12V 90A Hitachi Style. Part number HXA028 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 4 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA028, 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 NISSAN CEDRIC, NISSAN CEDRIC 1991, NISSAN CEDRIC 1992, NISSAN CEDRIC 1993. 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.

Compatibility note: Confirm fitment by matching part number HXA028, the Hitachi style application, and the listed mounting and pulley details against the vehicle’s existing alternator before purchase.

FAQ

What is the part number for this alternator?

The part number is HXA028.

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 90A power rating.

What type of regulator does it use?

It has an internal regulator.

What mounting and pulley details are listed?

It has a twin leg mount, 82 mm inside mounting legs, 175 mm mount centre to centre, an 8 mm pivot hole, an M8x1.25 adjusting hole, and a 4 groove pulley with a 65 mm outside diameter.

Which vehicles are shown in the fitment data?

The fitment data lists Nissan applications, including Cedric, Homy, Maxima, Maxima / Maxima QX, and Patrol. Specific preview years shown include Nissan Cedric 1991 to 1995 and Nissan Homy 1990 to 1994.