OEX Alternator 12V 180A Denso Style DXA4123

The OEX Alternator DXA4123 is a new 12V alternator rated at 180A, built in a Denso style application with a direct mount setup. It is supplied as an each unit and uses an internal regulator, which makes the main electrical and mounting checks important before ordering.

This unit has a 6 groove pulley with a 54mm outside diameter, a 50mm mount leg thickness, and a pin code of IR169. Those details matter when matching the alternator to the existing installation, especially where belt alignment, connector style, and physical mounting dimensions need to line up.

OEX lists this alternator under rotating electrical product groups and identifies it as part number DXA4123. It is backed by a 3 year passenger / 1 year commercial warranty, so it suits buyers who want a replacement alternator with defined electrical output and a documented warranty period.

The product is described as suitable for Denso unit make applications, and the supplied fitment information references Land Rover Range Rover applications across multiple model years. Because alternators can look similar while differing in mounting and electrical details, confirming the part number and specifications remains the safest way to buy correctly.

Key Features

• 12V alternator with 180A output
• New unit, supplied each
• Denso style with direct alternator mount
• Internal regulator
• 6 groove pulley
• Pulley outside diameter: 54mm

Specifications

• Brand: OEX
• Product type: Alternator
• Item type: Alternator
• Voltage: 12V
• Power rating: 180A
• Unit of measure: Each
• New / remanufactured: New
• Suits unit make: Denso

Fitment information supplied

• Land Rover Range Rover
• Land Rover Range Rover 2015
• Land Rover Range Rover 2016
• Land Rover Range Rover 2017
• Land Rover Range Rover 2018
• Land Rover Range Rover 2019
• Land Rover Range Rover 2020
• Land Rover Range Rover 2021

Application and Buying Notes

Before ordering, compare the part number DXA4123 and the alternator details against the unit already fitted to the vehicle. The key checks here are 12V voltage, 180A output, internal regulator type, direct mount design, IR169 pin code, and the 6 groove pulley with a 54mm outside diameter.

Physical dimensions are just as important as the electrical rating. This alternator is listed with a 50mm mount leg thickness and a weight of 7.18kg, so it is worth confirming the mounting arrangement and available space before purchase, particularly if the vehicle has had prior repairs or component changes.

The supplied fitment reference points to Land Rover Range Rover applications, including model years 2015 through 2021, but alternator fitment still needs to be checked carefully at vehicle level. Matching the make, model, year, connector/pin code, mount type, and pulley configuration is the most reliable way to avoid a mismatch.

If you are replacing an existing alternator, compare the old unit’s pulley groove count, regulator style, and mounting points rather than relying on appearance alone. A Denso style alternator can share a similar look with other units while still differing in electrical or mechanical details that affect installation.

For commercial use, the warranty period is listed as 1 year, while passenger use is listed as 3 years. Keep the purchase and installation details together, and confirm that the application, mounting, and electrical specification suit the vehicle before fitting the unit.

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 DXA4123 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, Pin Code IR169, Pulley Outside Diameter 54mm, Regulator Type Internal, Voltage 12, Item Type Alternator, Weight 7.18kg, Product Group 1 ROTATING ELECTRICAL.

Additional published details for cross-checking include Part No. DXA4123, Brand OEX, Description OEX Alternator 12V 180A Denso Style, Mount Leg Thickness 50mm, Power Rating (Amp) 180, Pulley Section 6 Groove, Suits Unit Make Denso, Alternator Mount Direct, New / Reman. New.

OEX Alternator 12V 180A Denso Style. Part number DXA4123 should be checked first. Listed voltage is 12. Listed output rating is 180. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Direct. 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 DXA4123, 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 180 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching part number DXA4123, the supplied 12V 180A specification, Denso style direct mount design, IR169 pin code, and 6 groove pulley details against the vehicle and the removed alternator before ordering.

FAQ

What type of alternator is this?

It is an OEX alternator, new, 12V, and rated at 180A. It is listed as a Denso style alternator with a direct mount and internal regulator.

What is the part number?

The part number listed is DXA4123.

Does it have an internal or external regulator?

This alternator has an internal regulator.

What pulley details are listed?

The pulley is listed as a 6 groove pulley with a 54mm outside diameter.

What warranty is supplied?

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

Which vehicles are referenced in the fitment information?

The supplied fitment information references Land Rover Range Rover applications, including model years 2015 through 2021. Final compatibility should still be confirmed against the vehicle and the original alternator details.