OEX Alternator 12V 70A Denso Style DXA400

The OEX DXA400 is a new 12V alternator rated at 70A, built in a Denso style and listed with a single leg mount. It suits Denso applications and is supplied with an internal regulator, so the unit specification needs to match the vehicle setup as well as the physical mounting points.

This alternator uses a 5 groove pulley with a 52mm outside diameter, a 59mm mount leg thickness, a 10mm pivot hole diameter, and an M8x1.25 adjusting hole. The mount centre-to-centre measurement is 161mm, and the unit weight is 4.3kg.

The note is important: it has a 3 pin oval regulator plug, and for a round 3 pin plug you need the DXA539 adaptor to suit HXK-22 and HXK-17. That plug detail is part of the buying decision here, because the alternator itself is not a universal swap.

Warranty cover is listed at 3 years for passenger use and 1 year for commercial use. As with any alternator, matching the part number, plug style, pulley arrangement, and mount measurements is the safest way to avoid a return fitment issue.

Key Features

• New alternator, not remanufactured
• 12V, 70A output rating
• Denso style unit
• Internal regulator
• Single leg mount
• Supplied with adaptor to suit HXK-22, HXK-17

Specifications

• Brand: OEX
• Part No.: DXA400
• Product type: Alternator
• Voltage: 12V
• Power rating: 70A
• New / reman.: New
• Regulator type: Internal
• Alternator mount: Single leg

Fitment notes

• Fitment is listed for Holden Apollo and Toyota applications, including Toyota Camry, Celica, Corolla, Corolla Levin, Corona, MR2, RAV 4, and Supra.
• Sample application years shown include Holden Apollo 1989, 1990, and 1991, plus Toyota Camry 1986, 1987, 1988, and 1989.
• Fitment details should still be checked against the vehicle’s existing alternator, regulator plug, pulley, and mount measurements before ordering.

Application and Buying Notes

Before ordering, compare the part number DXA400 with the existing unit and confirm the alternator is a Denso style 12V 70A application. The 3 pin oval regulator plug is a key detail here, because the note also states that a round 3 pin plug requires the DXA539 adaptor to suit HXK-22 and HXK-17.

The pulley and mounting measurements are specific enough to matter on the vehicle: 5 groove pulley, 52mm outside diameter, 59mm mount leg thickness, 10mm pivot hole, M8x1.25 adjusting hole, and 161mm centre-to-centre mount spacing. If any of those points differ on the vehicle, the alternator may not line up correctly even if the unit looks similar.

The listed fitment covers a number of Holden Apollo and Toyota models, but the safest check is always the alternator already fitted to the vehicle. Confirm the regulator plug shape, the mount style, and the pulley groove count before purchase, particularly where the vehicle may have had previous repairs or an alternator change during its life.

If you are working on a passenger vehicle, the warranty is listed at 3 years; for commercial use it is 1 year. Keep in mind that warranty cover does not replace the need to verify compatibility, and electrical parts are best matched carefully to avoid unnecessary diagnosis time and installation delays.

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 DXA400 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 59mm, Pivot Hole Diameter 10, Pulley Outside Diameter 52mm, Regulator Type Internal, Voltage 12, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA400, Brand OEX, Description OEX Alternator 12V 70A Denso Style - See Note, 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 - See Note. Part number DXA400 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 DXA400, 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: Confirm fitment by matching part number DXA400, the 3 pin oval regulator plug, Denso style application, and the listed mounting and pulley measurements before purchase. If the vehicle uses a round 3 pin plug, the DXA539 adaptor to suit HXK-22 and HXK-17 is required.

FAQ

What is the part number for this alternator?

The part number is DXA400.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output rating does it have?

It is a 12V alternator rated at 70A.

What regulator plug does it use?

It has a 3 pin oval regulator plug. The note also states that a round 3 pin plug requires the DXA539 adaptor to suit HXK-22 and HXK-17.

Which mounting and pulley details are listed?

The listed details are a single leg mount, 59mm mount leg thickness, 10mm pivot hole diameter, M8x1.25 adjusting hole diameter, 161mm mount centre-to-centre, and a 5 groove pulley with 52mm outside diameter.

What warranty is shown for this alternator?

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