OEX Alternator 24V 70A Cummins Style DXA9503

The OEX Alternator DXA9503 is a 24V, 70A heavy commercial alternator with a twin leg mount and internal regulator. It is listed as a new unit and is described as Cummins style, with a part number of DXA9503 and pin code IR165 for identification when matching applications.

Key mounting and drive details include 81mm inside mounting legs, a 164mm mount centre to centre measurement, M10x1.5 / 10 pivot hole diameter, 10mm adjusting hole diameter, and a 55mm pulley outside diameter. The pulley is 8 groove, so belt profile is an important check before ordering.

This alternator is noted for Cummins applications, with an additional fitment comment for Dongfeng applications with Cummins engines where OE number confirmation is required. Because alternator housings, mounts, pulley layouts and charge outputs vary between engines and builds, matching the part number and mounting measurements is the safest way to confirm suitability.

Key Features

• 24V heavy commercial alternator
• 70A output
• Internal regulator
• Twin leg alternator mount
• New unit
• 8 groove pulley

Specifications

• Brand: OEX
• Part No.: DXA9503
• Type: Alternator heavy comm
• Product group: Rotating electrical
• Voltage: 24
• Power rating: 70A
• Regulator type: Internal
• Alternator mount: Twin leg

Fitment guidance

• Suits unit make: Cummins
• Dongfeng applications with Cummins engine: check by OE number

Application and Buying Notes

Before ordering, confirm the alternator matches your existing unit by part number DXA9503 and by the physical mounting details: twin leg mount, 81mm inside mounting legs, 164mm mount centre to centre, and M10x1.5 / 10 pivot hole diameter. Those measurements are often the quickest way to rule out a mismatch when the vehicle application is not fully certain.

The electrical side also matters. This unit is 24V with a 70A output and an internal regulator, so it is intended for a system that already runs on 24 volts. If the vehicle uses a different voltage, regulator arrangement, or output requirement, the alternator may not be suitable even if the pulley or bracket appears close.

Belt drive detail should be checked carefully. The pulley is 55mm outside diameter and uses an 8 groove section, so the belt style and alignment need to suit the existing setup. It is also sensible to compare the pin code IR165 and the physical shape of the housing with the original unit before installation.

For some Dongfeng applications with a Cummins engine, the note specifically says to check by OE number. That makes the original part number or manufacturer reference especially important where there are multiple alternator variants used across similar engines or chassis configurations.

The product is a new OEX alternator, not a remanufactured unit, and is backed by a 3yr Passenger 1yr Commercial warranty. Warranty support is useful, but correct identification still comes first: the best result comes from confirming the OE number, mounting pattern, voltage, pulley specification and amperage before purchase.

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 DXA9503 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 HEAVY COMM, Unit of Measure EACH, Warranty 3yr Passenger 1yr Commercial, Inside Mounting Legs 81mm, Pivot Hole Diameter M10x1.5 / 10, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA9503, Brand OEX, Description OEX Alternator 24V 70A Cummins Style, Adjusting Hole Diameter 10, Pin Code IR165, Power Rating (Amp) 70, Pulley Section 8 Groove, Suits Unit Make Cummins.

OEX Alternator 24V 70A Cummins Style. Part number DXA9503 should be checked first. Listed voltage is 24. Listed output rating is 70. 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 DXA9503, 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 heavy comm in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 and output 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Where no verified application list is available, the part number, mounting details, connector style, and published specifications should be used as the primary selection criteria.

In the absence of a verified fitment list, the safest approach is to compare the removed unit directly with the listed product details. That includes checking the housing style, pulley layout, regulator arrangement, and any visible identification numbers before supply is approved.

Compatibility note: Please confirm compatibility using the part number DXA9503, the Cummins application reference, and the mounting and pulley measurements listed here. For Dongfeng applications with a Cummins engine, check by OE number before ordering.

FAQ

What is the part number for this alternator?

The part number is DXA9503. The pin code is IR165.

Is this a 12V or 24V alternator?

It is a 24V alternator with a 70A power rating.

Does it have an internal regulator?

Yes. The regulator type is internal.

What mounting details are listed?

It has a twin leg mount, 81mm inside mounting legs, a 164mm mount centre to centre measurement, an M10x1.5 / 10 pivot hole diameter, and a 10mm adjusting hole diameter.

What pulley does it use?

The pulley outside diameter is 55mm and the pulley section is 8 groove.

What fitment guidance is provided?

It is listed for Cummins applications. For Dongfeng applications with a Cummins engine, the note says to check by OE number.