OEX Alternator 12V 150A Denso Style DXA4129

The OEX Alternator DXA4129 is a new 12V, 150A unit in Denso style, supplied as an alternator with a pad mount and internal regulator. It is listed with a 7 groove pulley, 58.5mm pulley outside diameter, and a weight of 6.2kg, so it is the kind of replacement that should be matched carefully to the original unit before purchase.

This alternator is identified as suit unit make Denso, with pin code IR228, mount hole diameter 11/13, mount centres 175mm, mount centres A 74mm, and mount leg thickness 93mm. Those mounting and connector details matter just as much as voltage and output when checking whether it will suit a particular vehicle application.

OEX positions this range as a quality aftermarket option, and the listed warranty is 3yr Passenger / 1yr Commercial. If you are replacing a failed alternator on a vehicle that originally used a Denso-style 12V 150A pad-mount unit, the part number DXA4129 is the key identifier to compare against the original alternator and any application notes from the vehicle.

Built for rotating electrical applications, this unit is sold each and is a new replacement rather than remanufactured. That makes it important to confirm the physical mount style, pulley configuration, regulator type, and plug code before fitting, especially where the vehicle has been modified or the existing alternator has already been changed once.

Key Features

• 12V alternator with 150A output
• Denso style replacement
• New unit, not remanufactured
• Internal regulator
• Pad mount alternator
• 7 groove pulley

Specifications

• Brand: OEX
• Part No.: DXA4129
• Type: Alternator
• Voltage: 12
• Power Rating: 150A
• Unit of Measure: Each
• Suits Unit Make: Denso
• Alternator Mount: Pad

Fitment guidance

• Fitment is listed against Land Rover and Land Rover Defender applications.
• Sample applications supplied include Land Rover Defender 2011, 2012, 2013, 2014, 2015 and 2016.
• Use the part number DXA4129, the Denso style designation, and the mount and plug details to confirm the correct replacement before ordering.

Application and Buying Notes

Start with the original alternator identification. This unit is a 12V 150A OEX alternator, part number DXA4129, and it is specified as Denso style with a pad mount and internal regulator. If the existing alternator differs in mount type, pulley section, or connector code, the replacement may not line up correctly even if the electrical rating appears similar.

The pulley and mounting dimensions are the most practical checkpoints on this part. The pulley is a 7 groove design with a 58.5mm outside diameter, while the mounting details include 11/13mm mount hole diameter, 175mm mount centres, 74mm mount centres A, and 93mm mount leg thickness. Those measurements are what a fitter will use to compare the replacement against the removed unit.

The plug code is IR228, which is a useful reference when checking the alternator loom connection. On many vehicles, alternator replacement is straightforward only when the unit make, regulator type, mount style, pulley layout, and connector code all match. If any of those points differ, stop and verify the application before fitting.

This alternator is a new OEX unit and carries a 3yr Passenger / 1yr Commercial warranty. Warranty terms are important, but they do not replace fitment confirmation. A correct order still depends on matching the part number DXA4129 and confirming the vehicle uses a Denso-style 12V 150A pad-mount alternator with the listed dimensions and connector detail.

If you are comparing against an existing unit, check the old alternator carefully for the part number, pulley count, mount spacing, and plug arrangement. A 6.2kg alternator with a 150A rating is a substantial component, so correct identification before installation can save time, reduce the chance of mismatch, and avoid unnecessary removal and refitting work.

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 DXA4129 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 Hole Diameter 11/13, Pin Code IR228, Pulley Outside Diameter 58.5mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 175mm, Weight 6.2kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA4129, Brand OEX, Description OEX Alternator 12V 150A Denso Style, Mount Centres A 74mm, Mount Leg Thickness 93mm, Power Rating (Amp) 150, Pulley Section 7 Groove, Suits Unit Make Denso, Alternator Mount Pad.

OEX Alternator 12V 150A Denso Style. Part number DXA4129 should be checked first. Listed voltage is 12. Listed output rating is 150. 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 7 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

Compatibility note: Please confirm compatibility by matching part number DXA4129, Denso style application, pad mount, internal regulator, 7 groove pulley, IR228 plug code, and the listed mounting dimensions against the removed alternator and vehicle application details before purchase.

FAQ

What type of alternator is this?

It is an OEX alternator, 12V and 150A, listed as a Denso style unit with an internal regulator and pad mount.

Is this alternator new or remanufactured?

This part is listed as new, not remanufactured.

What is the part number?

The listed part number is DXA4129.

What pulley setup does it use?

It has a 7 groove pulley with a 58.5mm outside diameter.

What vehicles is it listed against?

Fitment guidance supplied references Land Rover and Land Rover Defender applications, including sample Defender years from 2011 through 2016.

What should I check before ordering?

Confirm the part number DXA4129, Denso style match, pad mount, internal regulator, IR228 plug code, and the mounting dimensions and pulley details against the existing alternator.