OEX Alternator 12V 100A Mitsubishi Style MXA2100

The OEX Alternator MXA2100 is a 12V, 100A unit in Mitsubishi style, supplied as a new alternator for rotating electrical applications. It uses an internal regulator and an 8 groove pulley, with a pulley outside diameter of 60mm, so matching the unit style and pulley details is an important part of checking suitability before purchase.

This alternator is listed with a twin leg mount, 188mm mounting centre to centre, 57mm inside mounting legs, and a pivot hole diameter of M10x1.25 / 10. Those mounting measurements matter when comparing against the existing unit, because alternators that look similar can differ in leg spacing, hole size, or bracket alignment.

OEX identifies this part as MXA2100, with pin code IR140, and it carries a 3 year warranty for passenger use and 1 year for commercial use. The unit weighs 6kg and is described as suitable for Mitsubishi applications, so the safest approach is to confirm the part number, mount type, and dimensions against the vehicle currently fitted.

Key Features

• 12V alternator rated at 100A
• Mitsubishi style unit
• Internal regulator
• 8 groove pulley
• Twin leg alternator mount
• New unit

Specifications

• Voltage: 12V
• Power rating: 100A
• Part No.: MXA2100
• Brand: OEX
• Suits unit make: Mitsubishi
• Alternator mount: Twin Leg
• Regulator type: Internal
• Pulley section: 8 Groove

Fitment guidance

• MAZDA: 3, 3 2009, 3 2010, 3 2011, 3 2012, plus other listed applications

Application and Buying Notes

Before ordering, compare the alternator currently fitted to the vehicle with the key identifiers on this unit: MXA2100, IR140, 12V, 100A, twin leg mount, and 8 groove pulley. Even when the unit is described as Mitsubishi style, the mounting layout and pulley configuration still need to line up with the existing application.

The most useful dimensions to verify are the 188mm mounting centre to centre, 57mm inside mounting legs, M10x1.25 / 10 pivot hole diameter, 10mm adjusting hole diameter, and 60mm pulley outside diameter. These measurements help confirm whether the alternator will physically mount and align correctly in the vehicle’s bracket system.

This alternator is a new OEX unit with an internal regulator, so it is important to check whether the vehicle requires an internally regulated alternator and whether the electrical connector and charging setup match the replacement part. If the original alternator differs in regulator type or pulley section, the unit may not be a direct swap.

The listed warranty is 3 years for passenger use and 1 year for commercial use. Warranty terms can vary by application and use, so it is worth confirming the intended vehicle use before fitting. As with any rotating electrical component, matching the part number and dimensions before installation reduces the chance of downtime or incorrect supply.

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 MXA2100 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 57mm, Pivot Hole Diameter M10x1.25 / 10, Pulley Outside Diameter 60mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 188mm, Weight 6kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. MXA2100, Brand OEX, Description OEX Alternator 12V 100A Mitsubishi Style, Adjusting Hole Diameter 10, Pin Code IR140, Power Rating (Amp) 100, Pulley Section 8 Groove, Suits Unit Make Mitsubishi, Alternator Mount Twin Leg.

OEX Alternator 12V 100A Mitsubishi Style. Part number MXA2100 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 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MXA2100, 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 by matching the part number MXA2100, the Mitsubishi style application, and the listed mounting and pulley dimensions against the vehicle already fitted. If any of the key measurements, regulator type, or mount style differ, pause and verify before ordering.

FAQ

What is the part number for this alternator?

The part number is MXA2100. The pin code listed is IR140. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.

What voltage and amperage is it rated at?

It is a 12V alternator rated at 100A. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as a new alternator. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.

What mounting style does it use?

It uses a twin leg alternator mount, with 188mm mount centre to centre and 57mm inside mounting legs. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.

What pulley details are provided?

The pulley is an 8 groove design with a 60mm outside diameter. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.

What warranty is listed?

The warranty listed is 3 years for passenger use and 1 year for commercial use. For this listing, part number MXA2100 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2009, MAZDA 3 2010. These details should still be checked against the original unit before ordering.