OEX Alternator 12V 140A Mitsubishi Style MXA2089

The OEX Alternator MXA2089 is a new 12V alternator rated at 140A, built in a Mitsubishi style configuration for suitable applications that match the listed mounting and pulley details. It uses an internal regulator, a 6 groove pulley, and a single leg alternator mount, so these physical details matter as much as the electrical rating when checking suitability.

Key measurements include a 58mm pulley outside diameter, 51mm mount leg thickness, 139mm mount centre to centre, and 10mm pivot and adjusting hole diameters. Those dimensions are the main checks to compare against the existing unit before ordering, especially where the alternator sits tight in the engine bay or uses a specific bracket setup.

This unit is supplied as an OEX rotating electrical part, with a warranty of 3 years for passenger use and 1 year for commercial use. It is identified by part number MXA2089 and pin code IR127, and it is listed as suitable for Mitsubishi unit make applications within the supplied fitment data.

Key Features

• 12V alternator rated at 140A
• New unit, not remanufactured
• Internal regulator type
• 6 groove pulley
• Single leg alternator mount
• Part number MXA2089

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 12V
• Current output: 140A
• Regulator type: Internal
• Pulley outside diameter: 58mm
• Pulley section: 6 groove
• Mount type: Single leg

Known fitment guidance

• Listed fitment makes include Holden, Holden Calais, Holden Commodore, HSV, and HSV Maloo.
• Fitment samples supplied include Holden Calais 2006 to 2016 and HSV Maloo 2013 to 2017.
• Always compare the existing alternator, mounting points, pulley style, and part number before purchase.
• Use the MXA2089 part number and the listed dimensions as the main confirmation points.

Application and Buying Notes

When replacing an alternator, the electrical rating is only one part of the check. For this OEX unit, the important identifiers are 12V, 140A, MXA2089, IR127, and the Mitsubishi style mounting arrangement with a single leg mount. If any of those details differ from the unit being removed, the alternator may not suit the vehicle without further confirmation.

The pulley and bracket dimensions are especially important on late-model Holden and HSV applications where several alternator variants can appear similar. This unit has a 58mm 6 groove pulley, 51mm mount leg thickness, 139mm mount centre to centre, and 10mm pivot and adjusting holes. Those are the measurements to compare against the old alternator, not just the vehicle badge or model name.

Because the supplied fitment list is application-based rather than a universal vehicle claim, it is best to verify by part number, physical layout, and mounting dimensions before ordering. That approach is particularly useful where the alternator is being replaced after a failure and the original unit may already be a previous service part.

The listed warranty is 3 years for passenger use and 1 year for commercial use. Warranty terms are useful, but they do not replace fitment confirmation. A correct match still depends on the alternator being the right 12V 140A Mitsubishi style unit with the same mounting and pulley details.

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 MXA2089 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 51mm, Pivot Hole Diameter 10, Pulley Outside Diameter 58mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 139mm, Weight 6.14kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. MXA2089, Brand OEX, Description OEX Alternator 12V 140A Mitsubishi Style, Adjusting Hole Diameter 10, Pin Code IR127, Power Rating (Amp) 140, Pulley Section 6 Groove, Suits Unit Make Mitsubishi, Alternator Mount Single Leg.

OEX Alternator 12V 140A Mitsubishi Style. Part number MXA2089 should be checked first. Listed voltage is 12. Listed output rating is 140. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MXA2089, 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 140 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include HOLDEN CALAIS, HOLDEN CALAIS 2006, HOLDEN CALAIS 2007, HOLDEN CALAIS 2008, HSV MALOO, HSV MALOO 2013. 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 the vehicle application, the MXA2089 part number, and the physical specifications including 12V, 140A, single leg mount, 58mm 6 groove pulley, 51mm mount leg thickness, 139mm mount centre to centre, and 10mm pivot and adjusting holes before ordering.

FAQ

What is the part number for this alternator?

The part number is MXA2089.

What voltage and output does it have?

It is a 12V alternator rated at 140A.

Is this alternator new or remanufactured?

It is listed as new.

What pulley setup does it use?

It uses a 58mm outside diameter pulley with a 6 groove section.

What regulator type is fitted?

It has an internal regulator.

What should I check before buying?

Confirm the vehicle application, the MXA2089 part number, and the physical measurements: 12V, 140A, single leg mount, 51mm mount leg thickness, 139mm mount centre to centre, 10mm pivot and adjusting holes, and 58mm 6 groove pulley.