OEX Alternator 12V 85A Denso Style DXA4056

The OEX Alternator DXA4056 is a new 12V, 85A unit built in a Denso style and supplied as an each item. It suits Denso applications and uses an internal regulator, with a 7 groove pulley and a single leg alternator mount.

Key dimensions to check before ordering are the 58mm mount leg thickness, 10mm pivot hole diameter, M8x1.25 adjusting hole, and 163mm mount centre to centre measurement. The pulley outside diameter is 58mm, and the unit weighs 4.5kg.

This alternator carries a 3 year warranty for passenger use and 1 year for commercial use. The part number is DXA4056, and the listed pin code is IR115. Matching those identifiers is one of the safest ways to confirm you are looking at the correct replacement.

If you are upgrading from a lower output alternator to a higher amp unit, the supplied guidance recommends upgrading the battery cable and fuse from the alternator to the battery. That advice also applies if replacing the 85A alternator with either the 130A or 160A unit.

Key Features

• 12V alternator with 85A output
• Denso style replacement
• Internal regulator
• New unit, not remanufactured
• Single leg alternator mount
• 7 groove pulley

Specifications

• Brand: OEX
• Product type: Alternator
• Power rating: 85A
• Voltage: 12V
• Suits unit make: Denso
• Regulator type: Internal
• Pulley outside diameter: 58mm
• Pulley section: 7 groove

Fitment notes

• Listed fitment includes Toyota applications.
• Toyota Hiace is shown in the fitment data.
• Toyota Hiace / Commuter is shown across multiple model years in the fitment data, including 2004 through 2013 in the grouped preview.
• Toyota Hilux is included in the fitment data.
• Toyota Regius Ace is included in the fitment data.
• Fitment count supplied: 62 application entries.

Application and Buying Notes

Before ordering, compare the part number DXA4056, the Denso-style specification, and the mounting details against the original alternator on the vehicle. The key physical checks here are the single leg mount, 58mm mount leg thickness, 10mm pivot hole, M8x1.25 adjusting hole, and 163mm mount centre to centre.

The pulley and electrical details matter just as much as the housing. This unit has a 58mm outside diameter pulley, 7 groove pulley section, 12V system voltage, 85A output, and internal regulator. Those details need to align with the vehicle’s existing charging setup to avoid a mismatch.

If the vehicle is being upgraded from a lower amp alternator to a higher output unit, the supplied guidance recommends upgrading the battery cable and fuse between the alternator and battery. That is particularly relevant when moving from the 85A unit to either the 130A or 160A option.

Commercial use and passenger use are covered differently under the listed warranty, so it is worth confirming the application before purchase. The warranty is 3 years for passenger use and 1 year for commercial use, which is useful context when selecting the right replacement for the job.

For a clean fit, confirm the pin code IR115, the mounting pattern, and the physical size of the replacement before installation. Alternators can appear similar externally while still differing in pulley section, regulator type, or mount geometry, so those details should be checked carefully.

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 DXA4056 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 10, Pulley Outside Diameter 58mm, 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. DXA4056, Brand OEX, Description OEX Alternator 12V 85A Denso Style, Adjusting Hole Diameter M8x1.25, Pin Code IR115, Power Rating (Amp) 85, Pulley Section 7 Groove, Suits Unit Make Denso.

OEX Alternator 12V 85A Denso Style. Part number DXA4056 should be checked first. Listed voltage is 12. Listed output rating is 85. 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 7 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA4056, 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 85 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment by matching part number DXA4056, the Denso-style application, the listed Toyota fitment details, and the mounting and pulley measurements against the original alternator before ordering.

FAQ

What is the part number for this alternator?

The listed part number is DXA4056.

Is this alternator new or remanufactured?

It is listed as new, not remanufactured.

What voltage and output does it have?

It is a 12V alternator with an 85A power rating.

What type of regulator does it use?

It uses an internal regulator.

Which mounting and pulley details should be checked?

Check the single leg mount, 58mm mount leg thickness, 10mm pivot hole diameter, M8x1.25 adjusting hole, 163mm mount centre to centre, and 58mm pulley outside diameter with a 7 groove section.

What should be considered if upgrading to a higher amp alternator?

If replacing the 85A alternator with either the 130A or 160A unit, it is recommended to upgrade the battery cable and fuse from the alternator to the battery.