OEX Alternator 12V 120A Denso Style DXA4090

The OEX Alternator DXA4090 is a new 12V, 120A alternator built in a Denso style configuration for vehicles using a pad mount alternator. It is supplied as an each unit and includes an internal regulator, a 6 groove pulley, and a 50mm pulley outside diameter.

Key mounting dimensions to check are the 72mm mount leg thickness, 69mm inside mounting legs, and 180mm mount centre to centre. The unit is listed with pin code IR89 and is marked as not insulated return.

For buyers comparing replacements, the most important identifiers are the OEX brand, part number DXA4090, 12V system voltage, 120 amp output, and Denso suitment. Those details should be matched carefully against the original alternator before purchase or installation.

Key Features

• New alternator, not remanufactured
• 12V system with 120A output
• Denso style unit
• Pad mount alternator
• Internal regulator
• 6 groove pulley

Specifications

• Brand: OEX
• Type: Alternator
• Part No.: DXA4090
• Voltage: 12V
• Power Rating: 120A
• New / Reman.: New
• Suits Unit Make: Denso
• Alternator Mount: Pad

Fitment guidance

• No verified vehicle fitment is provided here, so application should be confirmed against the existing alternator and vehicle details before ordering.
• The supplied fitment references include Ford, including Falcon, Focus and Kuga applications in the dataset preview, but the exact vehicle breakdown should still be checked against the part number and mounting details.
• Use the Denso style, pad mount design, 12V rating, 120A output, and listed dimensions to compare against the removed unit.
• Confirm the pulley groove count, pulley diameter, mount leg thickness, inside mounting leg dimension, and mount centre to centre measurement before fitting.

Application and Buying Notes

This alternator is specified as a new OEX DXA4090 unit with 12V charging output and a 120A power rating, so it suits applications that call for those exact electrical figures. The internal regulator and Denso style design are important checkpoints, because alternators with similar casing shapes can still differ in regulator type, mounting pattern, or pulley arrangement.

The physical measurements matter just as much as the electrical rating. Before buying, compare the 72mm mount leg thickness, 69mm inside mounting legs, 180mm mount centre to centre, and 50mm pulley outside diameter with the original alternator. A pad mount alternator with a 6 groove pulley will not be a safe assumption for every vehicle that uses a Denso-style unit.

The part number DXA4090 is the cleanest identifier to use when cross-checking against an old unit, parts catalogue, or workshop record. If the vehicle has already had a replacement alternator fitted, it is worth confirming the current unit rather than relying only on the model name or engine family.

Warranty coverage is listed as 3 years for passenger use and 1 year for commercial use. That can be useful when comparing replacement options, but the warranty does not replace the need to confirm fitment, connector code IR89, and the no insulated return specification before installation.

Because alternator fitment can vary within the same vehicle range, especially where different charging systems or mounting brackets are involved, the safest approach is to match the part number, mount style, pulley section, and regulator arrangement. If any one of those details differs, the unit should be checked again 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 DXA4090 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 72mm, Power Rating (Amp) 120, Pulley Section 6 Groove, Suits Unit Make Denso, Alternator Mount Pad, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4090, Brand OEX, Description OEX Alternator 12V 120A Denso Style, Inside Mounting Legs 69mm, Pin Code IR89, Pulley Outside Diameter 50mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 180mm.

OEX Alternator 12V 120A Denso Style. Part number DXA4090 should be checked first. Listed voltage is 12. Listed output rating is 120. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. 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 DXA4090, 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 120 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm compatibility using the part number DXA4090 and the full application details, including 12V, 120A, Denso style, pad mount, internal regulator, IR89 pin code, and the listed mounting and pulley measurements before ordering.

FAQ

What type of alternator is this?

It is an OEX alternator, new, 12V and rated at 120A. It is described as Denso style and uses a pad mount configuration with an internal regulator.

What is the part number for this alternator?

The part number is DXA4090.

Is this a new or remanufactured unit?

This unit is listed as new.

What pulley setup does it use?

It has a 6 groove pulley with a 50mm pulley outside diameter.

What mounting measurements are supplied?

The listed measurements are 72mm mount leg thickness, 69mm inside mounting legs, and 180mm mount centre to centre.

What warranty is listed?

The warranty listed is 3 years for passenger use and 1 year for commercial use.