OEX Alternator 12V 70A Denso Style DXA520

The OEX Alternator DXA520 is a 12V, 70A unit built in Denso style for applications that match the listed mount and pulley dimensions. It is a new alternator, supplied each, with an internal regulator, 5 groove pulley, and 70 amp output for compatible rotating electrical setups.

Key identifying details for this unit are the OEX part number DXA520, Denso unit make, 12 volt system voltage, and single leg alternator mount. The listed dimensions include a 58mm mount leg thickness, 164mm mount centre to centre, M8x1.25 adjusting hole, 10mm pivot hole diameter, 15mm shaft dimension, and 53.5mm pulley outside diameter.

This alternator is part of OEX rotating electrical range and is backed by a 3 year passenger / 1 year commercial warranty. OEX states its products are sourced from market leading original equipment manufacturers and aftermarket suppliers, with ISO9001 certified factories used to support engineering, testing, and quality control procedures.

Key Features

• 12V alternator with 70A output
• Denso style construction
• Internal regulator
• New unit
• Single leg alternator mount
• 5 groove pulley

Specifications

• Brand: OEX
• Product type: Alternator
• Part No.: DXA520
• Voltage: 12V
• Power rating: 70 amp
• Regulator type: Internal
• Suits unit make: Denso
• Alternator mount: Single leg

Compatibility references supplied

• Caterpillar 304.E2 CR
• Caterpillar 304E
• Caterpillar 305
• Caterpillar 305.5
• Caterpillar 305.5E2 CR
• Caterpillar 305.5ECR
• Caterpillar 305E CR
• Caterpillar 305E2 CR

Application and Buying Notes

Before ordering, compare the OEX part number DXA520 and the Denso style specification against the existing alternator on the vehicle or machine. The key checkpoints here are 12V system voltage, 70A output, internal regulator, single leg mount, 5 groove pulley, and the listed mounting dimensions of 58mm, 164mm centre to centre, and 10mm pivot hole diameter.

The mount and pulley details matter because alternators that look similar can still differ in shaft size, pulley section, bracket spacing, or regulator arrangement. This unit has a 53.5mm pulley outside diameter and a 15mm shaft dimension, so those measurements should be confirmed against the removed part before fitting.

Fitment references include Caterpillar, Hino, Komatsu and Toyota applications, including several Toyota Dyna, Hiace, Hilux and industrial listings. That said, matching by application name alone is not enough; the safest approach is to verify the part number, mounting layout, and pulley configuration together.

The listed warranty is 3 years for passenger use and 1 year for commercial use. If the vehicle or equipment is used commercially, the shorter warranty period applies, so it is worth checking the intended duty cycle before purchase.

At 4.24kg, this is a substantial rotating electrical component and should be handled as a precision electrical part, not just a mechanical bolt-on. Inspect belts, wiring connections, charge light behaviour, and battery condition when replacing an alternator, as those items can affect the result even when the alternator itself is correct.

If the removed alternator is an original Denso unit, the Denso style description is a useful starting point, but it is still essential to confirm the exact dimensions and the IR11 pin code where relevant. Small differences in mounting or plug arrangement can change whether the unit is a direct replacement.

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 DXA520 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 58mm, Pivot Hole Diameter 10, Pulley Outside Diameter 53.5mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 164mm, Shaft Dimension 15.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA520, Brand OEX, Description OEX Alternator 12V 70A Denso Style, Adjusting Hole Diameter M8x1.25, Pin Code IR11, Power Rating (Amp) 70, Pulley Section 5 Groove, Suits Unit Make Denso.

OEX Alternator 12V 70A Denso Style. Part number DXA520 should be checked first. Listed voltage is 12. Listed output rating is 70. 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 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA520, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include CATERPILLAR 304.E2 CR, CATERPILLAR 304.E2 CR 2014, CATERPILLAR 304E, CATERPILLAR 304E 2013, HINO DUTRO, HINO DUTRO 2000. 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: Confirm compatibility by checking the part number DXA520, Denso style application, 12V / 70A rating, internal regulator, and the listed mounting and pulley dimensions against the original alternator before purchase.

FAQ

What is the part number for this alternator?

The listed part number is DXA520.

Is this a 12 volt alternator?

Yes. The listed voltage is 12V.

What output does it provide?

The power rating is 70 amp.

Does it have an internal regulator?

Yes. The regulator type is internal.

What pulley type does it use?

It has a 5 groove pulley with a 53.5mm outside diameter.

What warranty is listed?

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