OEX Alternator 12V 140A Denso Style DXA4009

The OEX Alternator DXA4009 is a 12V, 140A unit built in a Denso style and supplied as a new alternator. It uses an external regulator, a twin leg alternator mount, and a 6 groove pulley with a 55mm outside diameter.

This alternator is identified with part number DXA4009 and pin code ER51. Key mounting dimensions include 68mm inside mounting legs, a 160mm mount centre-to-centre measurement, an M10x1.5 / 11.5 pivot hole diameter, and a 12mm adjusting hole diameter.

OEX positions this product in the rotating electrical range and states it suits Denso units. It is backed by a 3 year warranty for passenger use and 1 year for commercial use, which should be checked against the intended vehicle application before purchase.

Key Features

• 12V alternator with 140A output
• Denso style replacement
• External regulator type
• Twin leg alternator mount
• 6 groove pulley, 55mm outside diameter
• New unit, not remanufactured

Specifications

• Brand: OEX
• Product type: Alternator
• Part No.: DXA4009
• Voltage: 12V
• Power rating: 140A
• Regulator type: External
• Pulley section: 6 groove
• Pulley outside diameter: 55mm

Fitment guidance

• Fitment data includes Jeep Wrangler applications across 1996 to 2006 in the supplied records.
• The fitment preview also references Jeep Wrangler without a year, which may indicate broader application entries in the application list.
• Confirm the alternator mount style, pulley configuration, regulator type, and mounting dimensions against the vehicle before ordering.

Application and Buying Notes

This alternator is a 12V, 140A Denso style unit with an external regulator, so the electrical setup matters as much as the physical mounting points. Before ordering, compare the part number DXA4009, pin code ER51, and the 6 groove 55mm pulley against the unit already fitted to the vehicle.

Mounting detail should be checked carefully. The listed dimensions are 68mm inside mounting legs, 160mm mount centre-to-centre, an M10x1.5 / 11.5 pivot hole diameter, and a 12mm adjusting hole diameter. Those measurements are important when matching brackets and alignment, particularly on vehicles where several alternator versions were used.

The unit is described as new and carries a 3 year passenger / 1 year commercial warranty. Warranty coverage is useful, but it does not replace application checking. Confirm that the vehicle uses a Denso-style alternator with the same mount arrangement and regulator setup before fitting.

If the existing alternator differs in pulley groove count, regulator type, or mounting ear spacing, the part may not be suitable even if the connector or general appearance seems close. Matching the vehicle application and the physical measurements is the safest way to avoid ordering the wrong alternator.

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 DXA4009 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 68mm, Pivot Hole Diameter M10x1.5 / 11.5, Pulley Outside Diameter 55mm, Regulator Type External, Voltage 12, Mount Cnt to Cnt 160mm, Weight 6.56kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA4009, Brand OEX, Description OEX Alternator 12V 140A Denso Style, Adjusting Hole Diameter 12, Pin Code ER51, Power Rating (Amp) 140, Pulley Section 6 Groove, Suits Unit Make Denso, Alternator Mount Twin Leg.

OEX Alternator 12V 140A Denso Style. Part number DXA4009 should be checked first. Listed voltage is 12. Listed output rating is 140. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is External. 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 DXA4009, 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 140 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment by checking part number DXA4009, Denso-style application details, regulator type, pulley configuration, and the measured mounting dimensions against the vehicle before purchase.

FAQ

What is the part number for this alternator?

The part number is DXA4009. For this listing, part number DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. 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 DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. These details should still be checked against the original unit before ordering.

What is the output rating?

The alternator is rated at 140A and operates on 12V. For this listing, part number DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an external regulator. For this listing, part number DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. These details should still be checked against the original unit before ordering.

What vehicles are shown in the fitment data?

The supplied fitment records reference Jeep Wrangler applications from 1996 through 2006, with Jeep Wrangler also shown in the grouped preview. For this listing, part number DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Check the part number DXA4009, Denso-style application details, regulator type, pulley section, and the listed mounting dimensions of 68mm inside mounting legs, 160mm mount centre-to-centre, M10x1.5 / 11.5 pivot hole diameter, and 12mm adjusting hole diameter. For this listing, part number DXA4009 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include JEEP WRANGLER, JEEP WRANGLER 1996, JEEP WRANGLER 1997. These details should still be checked against the original unit before ordering.