Denso Alternator 12V 40A DXA4158

The Denso Alternator DXA4158 is a new 12V, 40A alternator supplied as each unit, with an internal regulator and twin leg alternator mount. It is listed with a 76mm outside pulley diameter, 67mm inside mounting legs, 156mm mount centre-to-centre, and an 8.5mm pivot hole diameter, so it is important to match the mounting and electrical setup before ordering.

This unit is identified as Denso part number DXA4158, with pin code IR17 and an active L lamp terminal. Where a round plug application is involved, the note specifies adaptor CC6447 to suit HXK-18, so connector style needs to be checked carefully against the vehicle or equipment already fitted.

The alternator is described as a compact and lightweight design at 5.12kg, and it is built with premium cores and precise OE assembly benchmarks. It is intended to meet demanding heat and electrical requirements, which makes the verified 12V and 40A output figures especially relevant when replacing a similar Denso charging unit.

Key Features

• New alternator, supplied each
• 12V, 40A power rating
• Internal regulator
• Twin leg alternator mount
• Active L lamp terminal
• Compact and lightweight design

Specifications

• Brand: Denso
• Part No.: DXA4158
• Product type: Alternator
• Voltage: 12V
• Power rating: 40A
• New / remanufactured: New
• Warranty: One year
• Alternator mount: Twin leg

Verified fitment applications

• Holden Barina
• Holden Drover
• Suzuki Hatch
• Suzuki Mighty Boy
• Suzuki Sierra
• Suzuki Swift
• Toyota Industrial 02-7FD35
• Toyota Industrial 3FG25

Application and Buying Notes

Before buying, match the part number DXA4158 first, then confirm the mounting details: twin leg alternator mount, 67mm inside mounting legs, 156mm mount centre-to-centre, 8.5mm pivot hole, and M8 adjusting hole. These measurements are the most direct way to check whether the alternator will physically align with the existing brackets and adjuster arrangement.

The electrical side also matters. This alternator is 12V with a 40A output, has an internal regulator, and includes an active L lamp terminal. If the plug style is a round plug application, the note specifies CC6447 adaptor to suit HXK-18, so the connector arrangement should be verified before fitting.

The pulley details are equally important on a charging system replacement. This unit has a 76mm pulley outside diameter and A section pulley profile, so the belt and pulley setup need to be matched to the existing application. A mismatch here can create installation issues even when the alternator otherwise looks similar.

Fitment is listed against a mix of passenger vehicles and Toyota industrial equipment, including Holden Barina and Drover, several Suzuki models, and Toyota Industrial 02-7FD35, 3FG25, 4SDK10, 5SDK9, 5SDK10, 5SDK11, FG25 and forklift applications. Because multiple application groups are shown, the safest approach is to confirm both the vehicle or machine listing and the physical dimensions before purchase.

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 DXA4158 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 One Year, Inside Mounting Legs 67mm, Pivot Hole Diameter 8.5, Pulley Outside Diameter 76mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4158, Brand DENSO, Description Denso Alternator 12V 40A, Adjusting Hole Diameter M8, Pin Code IR17, Power Rating (Amp) 40, Pulley Section A, Suits Unit Make Denso.

Denso Alternator 12V 40A. Part number DXA4158 should be checked first. Listed voltage is 12. Listed output rating is 40. 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA4158, 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 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility using Denso part number DXA4158, the 12V 40A specification, the twin leg mount dimensions, and the listed plug and lamp-terminal details before ordering.

FAQ

What is the part number for this alternator?

The listed part number is DXA4158. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 40A power rating. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.

Does it have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.

What connector note should be checked before purchase?

It has an active L lamp terminal, and for round plug applications the note specifies CC6447 adaptor to suit HXK-18. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.

What fitment groups are listed for this alternator?

Verified applications include Holden Barina and Drover, Suzuki Hatch, Mighty Boy, Sierra and Swift, plus Toyota Industrial 02-7FD35, 3FG25, 4SDK10, 5SDK9, 5SDK10, 5SDK11, FG25 and forklift applications. For this listing, part number DXA4158 is the main reference point. Listed voltage is 12. Listed output rating is 40. Published fitment references include HOLDEN BARINA, HOLDEN BARINA 1989, HOLDEN BARINA 1990. These details should still be checked against the original unit before ordering.