OEX Alternator 12V 90A Hitachi Style HXA109 LR190-750

The OEX Alternator 12V 90A Hitachi Style is a new alternator for Hitachi applications, supplied as part no. HXA109 and referenced with OEM number LR190-750. It is a 12 volt, 90 amp unit with an internal regulator, so it is aimed at buyers matching an existing Hitachi-style charging system rather than replacing a universal alternator.

Key mounting and pulley details are listed clearly: twin leg alternator mount, inside mounting legs 81 mm, mount centre to centre 160 mm, pivot hole diameter 10.5 mm, adjusting hole diameter M8 x 1.25, pulley outside diameter 70 mm, and AA pulley section. Those dimensions matter just as much as the electrical rating when you are comparing against the unit already in the vehicle.

This alternator is supplied new and weighs 5.7 kg. OEX positions the range as quality aftermarket equipment with ISO9001-certified factories and a warranty of 3 years for passenger use or 1 year for commercial use, which gives a useful reference point when selecting a replacement for the correct application.

Key Features

• 12V, 90A alternator
• Hitachi style application
• Internal regulator
• Twin leg mount
• New unit, not remanufactured
• AA pulley section

Specifications

• Brand: OEX
• Product type: Alternator
• Part no.: HXA109
• OEM number: LR190-750
• Voltage: 12V
• Power rating: 90 amp
• Suits unit make: Hitachi
• Alternator mount: Twin leg

Confirmed application groups

• Holden Colorado
• Holden Jackaroo / Monterey
• Holden Rodeo
• Isuzu D-MAX
• Isuzu Elf
• Isuzu Wizard

Application and Buying Notes

When comparing this alternator to the unit you are replacing, the most useful checks are the part number HXA109, the OEM number LR190-750, and the physical mounting details. The unit is a twin leg alternator with 81 mm inside mounting legs, 160 mm mount centre to centre, and a 10.5 mm pivot hole, so a close visual match on brackets and ears is important before ordering.

The charging setup is 12V and 90A with an internal regulator. That combination needs to suit the vehicle’s original electrical arrangement, so confirm the old alternator’s regulator type and output rating before purchase. The pulley details also need checking: 70 mm outside diameter with an AA section. A pulley mismatch can affect belt alignment and drive compatibility even when the unit otherwise appears similar.

This alternator is listed against Holden and Isuzu application groups, including Colorado, Jackaroo / Monterey, Rodeo, D-MAX, Elf and Wizard families. Those names alone are not enough to confirm the correct part, because the exact fit can vary by build and electrical setup. Use the part number, OEM reference, mounting dimensions and pulley specification together when verifying the replacement.

For buyers fitting to a commercial vehicle, the warranty is listed as 1 year commercial, while passenger use is listed as 3 years. The unit is supplied new and weighs 5.7 kg, which may also help when comparing against the removed alternator and checking that the replacement matches the expected physical size and construction.

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 HXA109 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 70mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 160mm, OEM Number LR190-750.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. HXA109, Brand OEX, Description OEX Alternator 12V 90A Hitachi Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR49, Power Rating (Amp) 90, Pulley Section AA, Suits Unit Make Hitachi.

OEX Alternator 12V 90A Hitachi Style. Part number HXA109 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 AA. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA109, 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 HOLDEN COLORADO, HOLDEN COLORADO 2008, HOLDEN COLORADO 2009, HOLDEN COLORADO 2010, ISUZU D-MAX, ISUZU D-MAX 2007. 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 HXA109, OEM number LR190-750, 12V 90A rating, internal regulator, twin leg mount, and the listed mounting and pulley dimensions against the existing unit and vehicle application details before purchase.

FAQ

What is the part number for this alternator?

The part number is HXA109. The OEM number listed is LR190-750.

What are the electrical specifications?

This is a 12V alternator with a 90 amp power rating and an internal regulator.

Is this alternator new or remanufactured?

It is listed as new, not remanufactured.

What mounting and pulley details are supplied?

The alternator has a twin leg mount, 81 mm inside mounting legs, 160 mm mount centre to centre, 10.5 mm pivot hole diameter, M8 x 1.25 adjusting hole diameter, 70 mm pulley outside diameter, and AA pulley section.

Which vehicle groups are listed for fitment?

The listed application groups are Holden Colorado, Holden Jackaroo / Monterey, Holden Rodeo, Isuzu D-MAX, Isuzu Elf, and Isuzu Wizard.

What warranty is listed?

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