OEX Alternator 12V 140A Mitsubishi Style MXA2020

The OEX MXA2020 is a new 12V alternator with a 140A power rating, built in Mitsubishi style and supplied as an each unit. It uses a single leg alternator mount, a 6 groove pulley, and a field control unit regulator type, so it is important to match those details before ordering.

Key physical checks for this unit include a 51mm mount leg thickness, 139mm mount centre to centre, 10.7mm mount hole diameter, and a 56mm pulley outside diameter. The listed weight is 6.3kg, which can help when comparing against the unit already fitted to the vehicle.

This alternator carries part number MXA2020 and is identified with pin code IR127. The note supplied for this part states that the field report terminal has a different output parameter to MXA330 and will not interchange, and that MXA2020 will not interchange with MXA306. Those notes matter just as much as voltage and amperage when confirming the correct replacement.

Key Features

• 12V, 140A alternator
• Mitsubishi style unit
• New replacement part
• Single leg alternator mount
• 6 groove pulley
• Field control unit regulator

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 12V
• Power rating: 140A
• Condition: New
• Unit of measure: Each
• Suits unit make: Mitsubishi
• Alternator mount: Single leg

Fitment guidance

• Fitment data supplied includes Holden Adventra, Calais, Caprice, Commodore, Crewman, Monaro, One Tonner and Statesman models.
• Fitment data supplied also includes HSV Avalanche, Coupe 4, Grange and SV6000 applications.
• Example application coverage provided includes Holden Adventra 2004, 2005, 2006 and 2007.
• Example application coverage provided includes HSV Avalanche 2004, 2005 and 2006.
• Example application coverage provided includes Holden Calais 2004, 2005 and 2006.
• Example application coverage provided includes Holden Caprice 1999 and 2000.
• Example application coverage provided includes HSV Grange 1999, 2000 and 2001.

Application and Buying Notes

Before buying, compare the part number MXA2020, the 12V system voltage, and the 140A output against the original alternator fitted to the vehicle. The supplied notes also state that MXA2020 will not interchange with MXA306, and that the field report terminal has a different output parameter to MXA330, so part-number matching is essential.

Physical dimensions should be checked carefully where there is any doubt. This unit has a 51mm mount leg thickness, 139mm mount centre to centre, a 10.7mm mount hole diameter, and a 56mm pulley outside diameter, which must align with the existing mounting and belt setup.

The alternator uses a 6 groove pulley and a field control unit regulator type. If the vehicle uses a different pulley profile, mounting arrangement, or regulator setup, the part may not be suitable even if the vehicle make appears similar. That is why the application list should be treated as a guide and the actual unit should still be verified against the vehicle and the removed alternator.

The listed warranty is 3 years for passenger use and 1 year for commercial use. That warranty applies to the OEX MXA2020 as supplied, but the correct fit still depends on matching the specification details, especially the mount style, pin code IR127, and the interchange notes already supplied.

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 MXA2020 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, Power Rating (Amp) 140, Pulley Section 6 Groove, Suits Unit Make Mitsubishi, Note Field report terminal has different Output Parameter to MXA330 and will not interchange. MXA2020 will not interchange with MXA306, Mount Cnt to Cnt 139mm, Weight 6.3kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. MXA2020, Brand OEX, Description OEX Alternator 12V 140A Mitsubishi Style, Mount Hole Diameter 10.7, Pin Code IR127, Pulley Outside Diameter 56mm, Regulator Type Field Control Unit, Voltage 12, Alternator Mount Single Leg.

OEX Alternator 12V 140A Mitsubishi Style. Part number MXA2020 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 Field Control Unit. 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 MXA2020, 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.

Compatibility note: Confirm fitment by checking part number MXA2020, pin code IR127, 12V/140A rating, mount dimensions, pulley details, and the vehicle application before ordering. The supplied interchange notes state MXA2020 will not interchange with MXA306, and the field report terminal differs from MXA330.

FAQ

What is the part number for this alternator?

The part number supplied is MXA2020.

What electrical rating does this alternator have?

It is a 12V alternator with a 140A power rating.

What type of pulley does it use?

It uses a 6 groove pulley with a 56mm pulley outside diameter.

What regulator type is listed?

The regulator type listed is a field control unit.

Does the fitment list include Holden and HSV vehicles?

Yes. The supplied fitment data includes Holden Adventra, Calais, Caprice, Commodore, Crewman, Monaro, One Tonner and Statesman, as well as HSV Avalanche, Coupe 4, Grange and SV6000 applications.

Are there interchange warnings for this part?

Yes. The supplied notes state that MXA2020 will not interchange with MXA306, and that the field report terminal has a different output parameter to MXA330.