OEX Alternator 12V 150A Mitsubishi Style MXA2103

The OEX MXA2103 is a new 12V alternator rated at 150 amps, supplied as a Mitsubishi style unit with an internal regulator. It is listed as a twin leg alternator mount with 67mm inside mounting legs, a 134mm centre-to-centre mount measurement, and 10mm / M10 pivot and adjusting holes.

This alternator uses a 6 groove pulley with a 51mm outside diameter and weighs 5.8kg. Those details matter when checking physical fitment, belt alignment and mounting style, especially where the vehicle’s original alternator is a Mitsubishi style replacement and the mounting points need to match closely.

OEX identifies this unit under part number MXA2103 and pin code IR140. The unit is covered by a 3 year passenger / 1 year commercial warranty, which provides a useful reference when selecting a replacement for a compatible charging system application.

Key Features

• New 12V alternator
• 150 amp output
• Mitsubishi style replacement
• Internal regulator
• Twin leg mount
• 6 groove pulley

Specifications

• Voltage: 12V
• Output: 150A
• Part No.: MXA2103
• Brand: OEX
• Product type: Alternator
• Condition: New
• Regulator type: Internal
• Alternator mount: Twin leg

Fitment guidance

• Listed fitment support includes Mazda, Mazda 3 and Mazda CX-5 applications.
• Sample applications provided include Mazda 3 2011, 2012 and 2013, along with Mazda CX-5 2013, 2014, 2015, 2016 and 2017.
• Fitment should still be checked against the exact alternator part number, mounting measurements and pulley details before purchase.

Application and Buying Notes

Before ordering, compare the vehicle’s existing alternator against the MXA2103 mounting measurements: 67mm inside mounting legs, 134mm mount centre to centre, and 10mm / M10 pivot and adjusting holes. These dimensions are the practical checks that help confirm whether the replacement will physically line up in the engine bay.

The pulley setup also needs attention. This alternator is supplied with a 51mm outside diameter pulley and a 6 groove pulley section, so belt type and pulley alignment should be verified against the removed unit. If the current alternator uses a different groove count or pulley size, the part may not be suitable without further confirmation.

Because this is a 12V, 150A alternator with an internal regulator, it should be matched to the vehicle’s charging system requirements rather than chosen only by appearance. The unit is described as Mitsubishi style and suits Mitsubishi as a unit make, but the correct application still depends on the vehicle’s exact alternator specification and mounting arrangement.

The listed warranty is 3 years for passenger use and 1 year for commercial use. Warranty coverage is useful, but it does not replace fitment checking. The safest approach is to confirm part number MXA2103, then compare the original unit’s mount style, pulley section, voltage and output rating before fitting.

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 MXA2103 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 67mm, Pivot Hole Diameter 10 / M10, Pulley Outside Diameter 51mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 134mm, Weight 5.8kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. MXA2103, Brand OEX, Description OEX Alternator 12V 150A Mitsubishi Style, Adjusting Hole Diameter 10 / M10, Pin Code IR140, Power Rating (Amp) 150, Pulley Section 6 Groove, Suits Unit Make Mitsubishi, Alternator Mount Twin Leg.

OEX Alternator 12V 150A Mitsubishi Style. Part number MXA2103 should be checked first. Listed voltage is 12. Listed output rating is 150. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MXA2103, 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 150 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MAZDA 3, MAZDA 3 2011, MAZDA 3 2012, MAZDA 3 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.

The listed warranty is 3yr Passenger 1yr Commercial. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility by matching the original alternator part number, mount style, pulley details and the listed MXA2103 specifications before ordering. Vehicle fitment references are provided for guidance only and should be checked against the actual unit on the vehicle.

FAQ

What is the part number for this alternator?

The part number is MXA2103. The pin code listed is IR140.

What voltage and output does this alternator have?

It is a 12V alternator with a 150A output rating.

Is this a new or remanufactured unit?

This is a new alternator.

What type of regulator does it use?

It uses an internal regulator.

What mounting and pulley details are listed?

The alternator has a twin leg mount, 67mm inside mounting legs, 134mm mount centre to centre, 10mm / M10 pivot and adjusting holes, and a 6 groove pulley with a 51mm outside diameter.

What fitment information is provided?

Listed fitment support includes Mazda, Mazda 3 and Mazda CX-5 applications, with sample applications including Mazda 3 2011 to 2013 and Mazda CX-5 2013 to 2017. Final fitment should still be confirmed against the original part number and dimensions.