OEX Alternator 12V 120A Denso Style DXA4002

The OEX Alternator 12V 120A Denso Style, part number DXA4002, is a new rotating electrical unit supplied as each. It is a 12V alternator with a 120 amp power rating, a 7 groove pulley, and an internal regulator, so it is aimed at applications that need those exact electrical and mounting details matched before purchase.

This unit is listed as a Denso style alternator and suits Denso unit make applications. The mounting details provided are a single leg alternator mount, 170mm mount centre to centre, 70mm mount leg thickness, 10mm pivot hole diameter, and M8 x 1.25 adjusting hole diameter. Those dimensions are the key checks for confirming whether it will physically suit the vehicle and bracket setup.

At 7kg, with a 55mm pulley outside diameter and IR75 pin code, this alternator has several identifiers that matter when replacing a unit that must match the existing configuration. If the original alternator differs in mounting style, pulley type, regulator arrangement, or connector/pin code, those differences should be checked carefully before ordering.

Key Features

• 12V alternator with 120A output
• Denso style unit
• Internal regulator
• 7 groove pulley
• Single leg alternator mount
• New unit supplied each

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 12V
• Power rating: 120 amp
• Part No.: DXA4002
• Suits unit make: Denso
• Regulator type: Internal
• Pulley section: 7 groove

Fitment guidance

• Fitment data provided references Land Rover Defender and Land Rover Discovery applications.
• Fitment samples include Land Rover Defender 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, and 2000.
• Fitment should still be confirmed against the vehicle’s original alternator part number, mounting layout, pulley style, and connector details before purchase.

Application and Buying Notes

When replacing a 12V, 120A alternator like DXA4002, the most important checks are the mounting measurements, pulley arrangement, and regulator type. The supplied details show a single leg mount, 170mm centre-to-centre mounting, a 70mm mount leg thickness, and a 7 groove pulley with a 55mm outside diameter, so these dimensions need to line up with the vehicle’s existing setup.

The Denso style listing and Denso unit make reference are useful only if the original alternator is the same style and connection arrangement. The IR75 pin code and internal regulator are practical identifiers to compare against the unit being replaced, especially where the vehicle has been fitted with different charging components over time.

This alternator is supplied new and carries a 3 year passenger or 1 year commercial warranty. That warranty is relevant to the product condition and use category, but it does not replace the need to confirm application, because alternators can look similar while differing in mounting leg thickness, pivot hole size, or pulley section.

If you are matching by vehicle rather than by part number, it is worth checking the original alternator label, mounting points, and belt pulley grooves before ordering. The part number DXA4002 is the clearest reference point, and the supplied fitment notes should be used alongside the physical unit or the vehicle’s existing electrical specification.

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 DXA4002 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 70mm, Pivot Hole Diameter 10, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 170mm, Weight 7kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA4002, Brand OEX, Description OEX Alternator 12V 120A Denso Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR75, Power Rating (Amp) 120, Pulley Section 7 Groove, Suits Unit Make Denso, Alternator Mount Single Leg.

OEX Alternator 12V 120A Denso Style. Part number DXA4002 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 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 DXA4002, 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.

Available application references include LAND ROVER DEFENDER, LAND ROVER DEFENDER 1990, LAND ROVER DEFENDER 1991, LAND ROVER DEFENDER 1992. 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.

Compatibility note: Please confirm fitment by checking part number DXA4002, the 12V 120A specification, Denso style application, single leg mount, 7 groove pulley, and the listed mounting dimensions against the original unit before ordering.

FAQ

What is the part number for this alternator?

The part number is DXA4002.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with a 120 amp power rating.

What regulator type is fitted?

It has an internal regulator.

What pulley setup does it use?

It has a 7 groove pulley with a 55mm outside diameter.

What vehicles are referenced in the fitment information?

The fitment information references Land Rover Defender and Land Rover Discovery applications, with sample Defender applications shown for 1990 through 2000.