OEX Alternator 12V 70A Denso Style DXA4145

The OEX Alternator DXA4145 is a 12V, 70A unit with a Denso style layout, designed as a new replacement alternator for applications that match its mounting and pulley details. Key identifiers include the part number DXA4145, twin leg alternator mount, 39mm inside mounting legs, and a 4 groove pulley with a 55mm outside diameter.

It is an internal regulator alternator and uses an M8x1.25 adjusting hole with a 10mm pivot hole. The mounting centre to centre measurement is 155mm, so these dimensions matter when confirming whether the unit will physically suit the vehicle and bracket arrangement.

This alternator is supplied under the OEX brand and is listed as new, not remanufactured. OEX states its products are sourced from market leading original equipment manufacturers and aftermarket suppliers, with ISO9001 certified factory sourcing and a nationwide warranty backing the product.

The listed fitment information includes Daihatsu applications, with coverage shown for Sirion, Terios, and YRV variants. Because alternators can differ by mount style, pulley section, regulator type, and dimensions, the part number and the measured specifications should be checked carefully before ordering.

Key Features

• 12V alternator with 70A power rating
• Denso style design
• New unit, not remanufactured
• Internal regulator type
• Twin leg alternator mount
• 4 groove pulley

Specifications

• Voltage: 12V
• Power rating: 70A
• Brand: OEX
• Part number: DXA4145
• Suits unit make: Denso
• New / remanufactured: New
• Alternator mount: Twin leg
• Inside mounting legs: 39mm

Known fitment applications

• Daihatsu Sirion
• Daihatsu Terios
• Daihatsu YRV
• Daihatsu Sirion 2000 to 2006 applications are listed
• Daihatsu Terios 2000 to 2002 applications are listed

Application and Buying Notes

When comparing this alternator to the one being replaced, start with the part number DXA4145 and the physical mounting details. The twin leg mount, 39mm inside mounting legs, 155mm mount centre to centre, M8x1.25 adjusting hole, and 10mm pivot hole are the practical checks that help confirm whether the unit will bolt up correctly.

The pulley setup also needs attention. This unit has a 4 groove pulley and a 55mm pulley outside diameter, so belt alignment and belt groove count should be matched against the vehicle’s existing setup. A Denso style alternator does not by itself guarantee interchangeability unless the mounting and pulley details also align.

Output capacity is another point to verify before choosing a replacement. This alternator is rated at 70A and operates at 12V with an internal regulator. Those specifications are suitable only where the vehicle’s charging system is intended to use that configuration, so it is worth checking the original unit label or vehicle details before purchase.

The listed fitment shows Daihatsu Sirion, Terios, and YRV applications, but model names alone are not enough for a safe match. Year, engine, bracket style, pulley section, and regulator arrangement can vary, so use the combination of vehicle application details and the DXA4145 part number together when confirming compatibility.

At 4.1kg, this is a substantial rotating electrical component, so correct handling during installation is important. Make sure the mounting points, belt path, and electrical connections are inspected before fitting, especially if the original alternator has had wear at the pivot or adjusting points.

OEX states the product is sourced through ISO9001 certified factories and is backed by a 3 year passenger and 1 year commercial warranty. That gives useful purchasing context, but the warranty does not replace the need to confirm the alternator is the correct specification for the vehicle it is going into.

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 DXA4145 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, Inside Mounting Legs 39mm, Power Rating (Amp) 70, Pulley Section 4 Groove, Suits Unit Make Denso, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4145, Brand OEX, Description OEX Alternator 12V 70A Denso Style, Adjusting Hole Diameter M8x1.25, Pivot Hole Diameter 10, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 155mm.

OEX Alternator 12V 70A Denso Style. Part number DXA4145 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 Twin Leg. Regulator type is Internal. Pulley configuration is 4 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA4145, 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.

Compatibility note: Confirm fitment using the part number DXA4145 together with the vehicle’s application details, mount style, pulley section, and measured dimensions before ordering.

FAQ

What is the part number for this alternator?

The part number is DXA4145.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and amperage does it have?

It is a 12V alternator rated at 70A.

What type of regulator does it use?

It uses an internal regulator.

Which vehicles are listed in the fitment information?

The fitment information lists Daihatsu Sirion, Daihatsu Terios, and Daihatsu YRV applications, including Sirion 2000 to 2006 and Terios 2000 to 2002 entries.

What should I check before buying?

Check the part number DXA4145, the twin leg mount, 39mm inside mounting legs, 155mm mount centre to centre, 4 groove pulley, 55mm pulley outside diameter, and the vehicle application details before ordering.