OEX Alternator 12V 100A Denso Style DXA4182

The OEX Alternator DXA4182 is a new 12V, 100A unit in Denso style, supplied as an alternator for rotating electrical applications. It uses a 6 groove pulley, internal regulator, and twin leg alternator mount, so the physical mounting details matter as much as the electrical rating when matching it to the vehicle.

This unit is listed with a 55mm pulley outside diameter, 173mm mount centre to centre, 51mm inside mounting legs, an M10x1.25 pivot hole, and an M8x1.25 adjusting hole. Those dimensions are the key checks before purchase, especially where the original alternator has a Denso-type layout and the same mounting pattern.

OEX identifies this alternator as a new part, not remanufactured, and it carries a 3 year passenger / 1 year commercial warranty. The brand notes also state that OEX products are sourced through ISO9001 certified factories and from market leading original equipment manufacturers and aftermarket suppliers.

Key Features

• 12V alternator with 100A output
• Denso style unit
• Internal regulator
• 6 groove pulley
• Twin leg alternator mount
• New unit

Specifications

• Brand: OEX
• Part No.: DXA4182
• Product type: Alternator
• Voltage: 12V
• Power rating: 100A
• Pulley outside diameter: 55mm
• Pulley section: 6 groove
• Alternator mount: Twin leg

Fitment guidance

• Fitment information includes Toyota applications, with Toyota Corolla listed for 2014, 2015, 2016, 2017, 2018 and 2019 in the preview data.
• Toyota RAV 4 is also listed in the preview data, including 2012, 2013, 2014 and 2015 applications.
• Confirm the part number DXA4182 and match the alternator mounting dimensions, pulley type and regulator type before ordering.
• Check the vehicle’s existing alternator against the 12V, 100A, 6 groove, Denso style specification rather than relying on appearance alone.

Application and Buying Notes

When comparing this alternator to the one already fitted, the most useful checks are the part number DXA4182, the Denso style layout, and the mounting measurements of 173mm centre to centre, 51mm inside mounting legs, M10x1.25 pivot hole, and M8x1.25 adjusting hole. These dimensions are often what separates a close match from a proper fit.

The pulley details are also important. This alternator has a 55mm pulley outside diameter and a 6 groove pulley section, so the belt setup needs to align with the vehicle’s existing drive arrangement. If the pulley profile or groove count differs, it should be treated as a mismatch until proven otherwise.

The electrical side is equally specific: this is a 12V alternator rated at 100A with an internal regulator. That makes it suitable only where the vehicle calls for that same voltage, output level, and regulator arrangement. If the original unit uses a different regulation setup or output rating, the replacement should be checked carefully before fitting.

Because fitment data can vary by engine, build date, and installed equipment, the safest approach is to compare the original alternator, the mounting points, and the plug and pulley arrangement before ordering. The listed Toyota applications provide a useful guide, but the part number and physical specifications should still be confirmed on the vehicle.

This is a new alternator supplied each, and the 4.96kg weight gives a practical reference when comparing the part against the unit being removed. For workshop or DIY replacement work, that weight, together with the Denso style and twin leg mount, can help identify whether the current unit is the same pattern or a different variant.

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 DXA4182 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 51mm, Pivot Hole Diameter M10x1.25, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 173mm, Weight 4.96kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA4182, Brand OEX, Description OEX Alternator 12V 100A Denso Style, Adjusting Hole Diameter M8x1.25, Pin Code IR228, Power Rating (Amp) 100, Pulley Section 6 Groove, Suits Unit Make Denso, Alternator Mount Twin Leg.

OEX Alternator 12V 100A Denso Style. Part number DXA4182 should be checked first. Listed voltage is 12. Listed output rating is 100. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA4182, 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: Please confirm compatibility by matching part number DXA4182, 12V 100A rating, Denso style layout, twin leg mount, 6 groove pulley, and the listed mounting measurements against the vehicle before purchasing.

FAQ

What is the part number for this alternator?

The part number is DXA4182.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with a 100A power rating.

Does it have an internal or external regulator?

It has an internal regulator.

What pulley setup does it use?

It uses a 6 groove pulley with a 55mm pulley outside diameter.

What should be checked before ordering for fitment?

Confirm DXA4182, the Denso style layout, 12V 100A rating, twin leg mount, 173mm mount centre to centre, 51mm inside mounting legs, and the M10x1.25 pivot hole and M8x1.25 adjusting hole against the vehicle’s existing alternator.