OEX Alternator 12V 70A Denso Style DXA4028

The OEX Alternator DXA4028 is a new 12V, 70A unit designed in a Denso style with a single-leg alternator mount. It suits applications that call for a Denso-type alternator with a 5 groove pulley, 55mm pulley outside diameter, and 159mm mount centre-to-centre measurement.

This alternator uses an internal regulator and has a mount leg thickness of 58mm, with an 8mm adjusting hole diameter and IR7 pin code. Those measurements matter when matching the physical fit of the unit, particularly where brackets, plugs, and belt alignment must line up correctly.

OEX supplies products from market leading original equipment manufacturers and aftermarket suppliers, with sourcing from ISO9001 certified factories. The unit is backed by a 3 year passenger and 1 year commercial warranty, and the alternator weighs 5.2kg as supplied.

Key Features

• New alternator, not remanufactured
• 12V, 70A output
• Denso style unit
• Single-leg alternator mount
• 5 groove pulley
• Internal regulator

Specifications

• Brand: OEX
• Type: Alternator
• Part No.: DXA4028
• Voltage: 12V
• Power rating: 70A
• New / Reman.: New
• Suits unit make: Denso
• Alternator mount: Single leg

Fitment guidance

• Toyota Corolla applications are shown in the fitment data
• Toyota Corolla model years listed include 1989, 1990, 1991, 1992, 1993 and 1994

Application and Buying Notes

Before ordering, confirm that your original alternator is a Denso style unit and check the key physical measurements against DXA4028: 12V, 70A, single-leg mount, 58mm mount leg thickness, 159mm mount centre-to-centre, and a 5 groove pulley with a 55mm outside diameter. These details are often the quickest way to avoid a mismatch when replacing a charging system component.

The internal regulator and IR7 pin code also need to line up with the vehicle’s wiring and connector arrangement. Even where the vehicle make and model appear similar, alternators can differ by plug style, mounting style, pulley type, and output rating, so it is worth comparing the old unit before purchasing.

If you are replacing a worn alternator, check the condition of the belt, mounting brackets, and electrical connections at the same time. The listed 5.2kg weight, 8mm adjusting hole diameter, and Denso unit make are useful reference points when comparing against the existing part on the vehicle.

The warranty is 3 years for passenger use and 1 year for commercial use. That warranty does not replace fitment checking, so part number DXA4028, the Denso style design, and the mount and pulley measurements should still be confirmed against the vehicle before installation.

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 DXA4028 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, Power Rating (Amp) 70, Pulley Section 5 Groove, Suits Unit Make Denso, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4028, Brand OEX, Description OEX Alternator 12V 70A Denso Style, Adjusting Hole Diameter 8, Pin Code IR7, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 159mm.

OEX Alternator 12V 70A Denso Style. Part number DXA4028 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 DXA4028, 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 compatibility by matching part number DXA4028, Denso style application details, 12V 70A output, single-leg mounting, pulley configuration, and the listed physical measurements against the original alternator and vehicle requirements before ordering.

FAQ

Is this alternator new or remanufactured?

This OEX alternator is listed as new, not remanufactured. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.

What is the output rating?

The power rating is 70A at 12V. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.

What pulley setup does it have?

It has a 5 groove pulley with a 55mm pulley outside diameter. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.

Which part number should I match?

The part number is DXA4028. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.

What warranty is supplied?

The warranty is 3 years for passenger use and 1 year for commercial use. For this listing, part number DXA4028 is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include TOYOTA COROLLA, TOYOTA COROLLA 1989, TOYOTA COROLLA 1990. These details should still be checked against the original unit before ordering.