OEX Alternator 12V 40A Denso Style DXA487

The OEX Alternator DXA487 is a 12V, 40A unit in Denso style with an internal regulator and a single leg alternator mount. Key dimensions include a 69mm pulley outside diameter, 24mm mount leg thickness, 138mm mount centre to centre, 10mm pivot hole diameter, M8 x 1.25 adjusting hole, and a 15mm shaft dimension.

This alternator is supplied new, not remanufactured, and weighs 3.2kg. It is listed under OEX part number DXA487 with pin code IR17 and pulley section A. Those identifiers are useful when checking against the original unit, especially where the vehicle or machine uses a Denso-style alternator arrangement.

OEX positions this range as an aftermarket option backed by ISO9001 certified factory processes and a comprehensive warranty. For passenger use the warranty is 3 years, and for commercial use it is 1 year. As with any alternator replacement, the important checks are voltage, output rating, mounting style, pulley type, and connector details before ordering.

Key Features

• 12V alternator with 40A output
• Denso style unit
• Internal regulator
• Single leg alternator mount
• New unit, not remanufactured
• Pin code IR17

Specifications

• Brand: OEX
• Part No.: DXA487
• Product type: Alternator
• Voltage: 12V
• Power rating: 40 amp
• Suits unit make: Denso
• Mount leg thickness: 24mm
• Pivot hole diameter: 10mm

Fitment and application guidance

• Fitment is referenced for a wide range of machinery and small equipment applications across makes including ACTIVE, AIRMAN, AMMANN, ASV, CASE, CATERPILLAR, CUB CADET, DYNAPAC, EUROCOMACH, HITACHI, IHI, JCB, JOHN DEERE, KOBELCO, KOMATSU, KUBOTA, MITSUBISHI INDUSTRIAL, MOSA, MUSTANG, NEW HOLLAND, PERKINS and SAKAI.
• Example listed applications include ACTIVE AE18U, AIRMAN AX10U-4, AMMANN AV12, ASV RT-30, CASE 1825B, CATERPILLAR 304C, DYNAPAC CC800, EUROCOMACH ES150.5SR, HITACHI EX15, JCB 8018CTS, JOHN DEERE 17D, KUBOTA BX25, NEW HOLLAND E18, PERKINS 403D-11 and SAKAI SW230.
• Other listed applications include CATERPILLAR 300.9D, 304CCR, 305.5DCR and 905B-type related entries are not provided; only the applications explicitly supplied should be used for checking.
• Because alternators are commonly shared across multiple engines and chassis, the safest match is confirmation against the part number DXA487, the Denso-style configuration, and the mounting and pulley measurements before purchase.

Application and Buying Notes

Confirm the original alternator is a Denso-style 12V unit before relying on the part number alone. The listed 40A output, internal regulator, single leg mount, and pulley section A are all important details that need to align with the removed unit, not just the vehicle model or machine brand.

The mounting dimensions are specific: 24mm mount leg thickness, 10mm pivot hole diameter, 138mm centre to centre, and an M8 x 1.25 adjusting hole. If any of these points differ from the existing alternator, the unit may not sit or tension correctly even if the application appears similar.

Pulley and shaft details also matter. This alternator has a 69mm pulley outside diameter and a 15mm shaft dimension, so the belt profile and spacing should be checked during comparison with the old part. The pin code IR17 is another useful identifier when matching electrical connection style.

The part is supplied new and carries a 3 year passenger / 1 year commercial warranty. Warranty coverage is useful, but it does not replace a proper fitment check. Match the vehicle or equipment application, part number DXA487, and the physical dimensions before ordering to reduce the chance of a return or installation delay.

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 DXA487 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 24mm, Pivot Hole Diameter 10, Pulley Outside Diameter 69mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 138mm, Shaft Dimension 15.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA487, Brand OEX, Description OEX Alternator 12V 40A Denso Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR17, Power Rating (Amp) 40, Pulley Section A, Suits Unit Make Denso.

OEX Alternator 12V 40A Denso Style. Part number DXA487 should be checked first. Listed voltage is 12. Listed output rating is 40. 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA487, 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 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ACTIVE AE18U, AIRMAN AX10U-4, AIRMAN AX17U-6A, AIRMAN AX27, AMMANN AV12, AMMANN AV16. 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: Please confirm fitment using part number DXA487, the Denso-style application, the 12V 40A specification, and the mounting and pulley measurements before purchase. Vehicle and machine listings should always be checked against the removed unit.

FAQ

What is the part number for this alternator?

The part number is DXA487.

Is this a 12V or 24V alternator?

It is a 12V alternator.

What is the output rating?

The alternator is rated at 40 amp.

Does it use an internal regulator?

Yes. The regulator type is internal.

Is this a new or remanufactured unit?

It is listed as new.

What warranty is supplied?

The warranty is 3 years for passenger use and 1 year for commercial use.