Denso Alternator 12V 85A DXA4078

This Denso alternator is a new 12V, 85A unit supplied under part number DXA4078. It uses an internal regulator, a 7 groove pulley with 58mm outside diameter, and a single leg alternator mount, so the physical layout matters as much as the electrical rating when confirming replacement suitability.

The listed mounting details are specific: mount leg thickness is 58mm, pivot hole diameter is 10, mount centre to centre is 163mm, and the adjusting hole diameter is M8x1.25. These measurements are the key checkpoints for matching the alternator to the vehicle and the existing installation points.

It is described as a compact and lightweight design at 5kg, with premium cores and precise OE assembly benchmarks. The unit is intended for demanding heat and electrical conditions, and it is sold as each unit rather than as a kit or set.

Key Features

• New Denso alternator
• 12V output
• 85A power rating
• Internal regulator
• 7 groove pulley
• Single leg mount

Specifications

• Brand: Denso
• Product type: Alternator
• Condition: New
• Voltage: 12V
• Output: 85A
• Part No.: DXA4078
• Regulator type: Internal
• Alternator mount: Single leg

Known fitment applications

• Toyota Hiace
• Toyota Hiace / Commuter
• Toyota Hiace / Commuter 2004
• Toyota Hiace / Commuter 2005
• Toyota Hiace / Commuter 2006
• Toyota Hiace / Commuter 2007
• Toyota Hiace / Commuter 2008
• Toyota Hiace / Commuter 2009

Application and Buying Notes

Before ordering, compare the part number DXA4078 with your existing alternator and check the mounting pattern carefully. The single leg mount, 163mm mount centre to centre, 58mm mount leg thickness, and M8x1.25 adjusting hole are all important because alternators that share a similar output can still differ in bracket and ear dimensions.

The electrical side should also be checked against the vehicle’s charging setup. This unit is 12V with an 85A output and an internal regulator, so it should only be selected where those specifications match the replacement requirement. The 7 groove pulley with a 58mm outside diameter is another point to confirm against the pulley already fitted.

This alternator is listed as a Denso unit and the fitment data includes Toyota Hiace, Toyota Hiace / Commuter, and Toyota Hiace / Commuter applications across 2004 through 2013 in the provided preview. That said, vehicle changes can occur within a model range, so matching by registration, build details, and the original part number remains the safest approach.

At 5kg, the unit is compact and relatively light for its class, but weight alone is not a fitment guide. The practical way to buy with confidence is to confirm the mounting style, pulley configuration, and regulator type alongside the part number DXA4078 before installation.

The warranty is 12 months or 20000km, whichever comes first. Keep your invoice and check the alternator condition and charging system before fitting, because a replacement alternator can be affected by wiring faults, battery condition, or belt issues that sit outside the alternator itself.

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 DXA4078 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 12 Months 20000km, Mount Leg Thickness 58mm, Pivot Hole Diameter 10, Pulley Outside Diameter 58mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 163mm, Weight 5kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA4078, Brand DENSO, Description Denso Alternator 12V 85A, Adjusting Hole Diameter M8x1.25, Pin Code IR115, Power Rating (Amp) 85, Pulley Section 7 Groove, Suits Unit Make Denso, Alternator Mount Single Leg.

Denso Alternator 12V 85A. Part number DXA4078 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 DXA4078, 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.

Available application references include TOYOTA HIACE, TOYOTA HIACE / COMMUTER, TOYOTA HIACE / COMMUTER 2004, TOYOTA HIACE / COMMUTER 2005. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

The listed warranty is 12 Months 20000km. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility by matching part number DXA4078, the 12V 85A specification, internal regulator, single leg mount, and the listed pulley and mounting measurements against the original unit and vehicle application details before purchase.

FAQ

What is the part number for this alternator?

The part number is DXA4078.

What voltage and output does this alternator have?

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

Does this alternator use an internal regulator?

Yes. The regulator type is listed as internal.

What pulley configuration does it have?

It has a 7 groove pulley with a 58mm outside diameter.

What mounting details should I check before ordering?

Check the single leg mount, mount leg thickness of 58mm, pivot hole diameter of 10, mount centre to centre of 163mm, and the M8x1.25 adjusting hole diameter.

What warranty is supplied with this alternator?

The warranty is 12 months or 20000km.