OEX Alternator 12V 70A Denso Style DXA457

The OEX Alternator DXA457 is a new 12V unit rated at 70 amps, built in a Denso style configuration and supplied with a single leg mount. It uses an internal regulator, a 3 groove pulley with a 67mm outside diameter, and a 153mm mount centre-to-centre measurement.

This alternator is listed under OEX part number DXA457 and carries OEM number 31100-PH7-004. The unit weighs 4.7kg and uses a mount leg thickness of 58mm, a pivot hole diameter of 11mm, and an adjusting hole diameter of M8 x 1.25.

It is specified as suitable for Denso applications, with the note that it can use RXA457. Fitment data supplied with this listing references Honda Legend applications, including 1986, 1987 and 1988 model years, so matching the part number and physical measurements remains important before ordering.

Key Features

• 12V alternator rated at 70A
• New OEX unit, not remanufactured
• Denso style with internal regulator
• Single leg mount arrangement
• 3 groove pulley, 67mm outside diameter
• Can use RXA457

Specifications

• Brand: OEX
• Part number: DXA457
• OEM number: 31100-PH7-004
• Voltage: 12V
• Output: 70 amps
• Type: Alternator
• New / remanufactured: New
• Regulator type: Internal

Fitment guidance

• Honda Legend
• Honda Legend 1986
• Honda Legend 1987
• Honda Legend 1988

Application and Buying Notes

Before ordering, confirm the vehicle application against the part number DXA457 and the OEM number 31100-PH7-004. The supplied fitment references point to Honda Legend applications, including 1986, 1987 and 1988, but alternator fitment still depends on matching the mounting layout, pulley setup and electrical specification.

The key measurements here are practical checks, not just catalogue details. This unit is a 12V, 70A alternator with a single leg mount, 153mm mount centre-to-centre, 58mm mount leg thickness, 11mm pivot hole diameter, and an M8 x 1.25 adjusting hole. Those dimensions should be compared with the unit being replaced before fitment.

The pulley is a 3 groove design with a 67mm outside diameter, so belt alignment and groove count need to match the vehicle’s existing setup. The regulator is internal, which is another point to confirm against the original alternator or the vehicle’s charging system arrangement.

Because this is a new OEX alternator, it is supplied as a complete replacement unit rather than a repaired or remanufactured assembly. The stated warranty is 3 years for passenger use and 1 year for commercial use, but the warranty does not replace the need to verify application, mounting and electrical compatibility first.

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 DXA457 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 11, Pulley Outside Diameter 67mm, Regulator Type Internal, Voltage 12, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Weight 4.7kg, Product Group 1 ROTATING ELECTRICAL, Part No. DXA457, Brand OEX, Description OEX Alternator 12V 70A Denso Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR3, Power Rating (Amp) 70, Pulley Section 3 Groove, Suits Unit Make Denso.

OEX Alternator 12V 70A Denso Style. Part number DXA457 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 3 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA457, 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.

Compatibility note: Please confirm fitment using the part number DXA457, OEM number 31100-PH7-004, and the listed mounting and pulley measurements before purchase. The supplied fitment references are limited to Honda Legend applications and should be checked carefully against the vehicle already fitted with the alternator.

FAQ

What is the part number for this alternator?

The listed part number is DXA457. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.

What is the electrical output?

It is a 12V alternator rated at 70 amps. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

This alternator is listed as new. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.

What pulley setup does it use?

It has a 3 groove pulley with a 67mm outside diameter. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.

What vehicles are listed in the fitment data?

The supplied fitment references Honda Legend applications, including 1986, 1987 and 1988 models. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Confirm the part number DXA457, OEM number 31100-PH7-004, the single leg mount setup, the 153mm mount centre-to-centre measurement, and the pulley and hole dimensions against the vehicle being replaced. For this listing, part number DXA457 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HONDA LEGEND, HONDA LEGEND 1986, HONDA LEGEND 1987. These details should still be checked against the original unit before ordering.