OEX Alternator 12V 80A Denso Style DXA4125RTE

The OEX Alternator DXA4125RTE is a new 12V, 80 amp alternator in Denso style, supplied as each unit. It uses a single leg alternator mount with 160mm mount centre to centre, a 58mm mount leg thickness, and an M8 x 1.25 adjusting hole diameter, so the physical mounting points need to match the vehicle application before ordering.

This unit is fitted with an internal regulator and an AA section pulley with a 78mm outside diameter. Those details matter when replacing an existing alternator, because pulley profile, mounting style, and regulator type all need to align with the vehicle’s charging system and belt setup.

OEX identifies this alternator as suitable for Denso units, with a pin code of IR11 and a note that it suits SLEEPER CAB air conditioning applications only. That application note should be checked carefully against the vehicle and the existing alternator arrangement before purchase.

Key Features

• 12V alternator with 80 amp power rating
• New unit, supplied each
• Denso style unit
• Internal regulator
• Single leg alternator mount
• AA section pulley

Specifications

• Brand: OEX
• Part number: DXA4125RTE
• Product type: Alternator
• Voltage: 12V
• Power rating: 80A
• New / remanufactured: New
• Suits unit make: Denso
• Alternator mount: Single leg

Application and Buying Notes

Before buying, compare the part number DXA4125RTE with the alternator already fitted to the vehicle. The key hardware details to check are the single leg mount, 160mm mount centre to centre, 58mm mount leg thickness, and the M8 x 1.25 adjusting hole. If any of those points differ, the alternator may not physically suit the application.

The pulley details also need attention. This alternator uses an AA section pulley with a 78mm outside diameter, so belt type and pulley profile must be matched carefully. A mismatch here can cause belt tracking issues or prevent correct installation, even if the electrical rating appears suitable.

Electrically, this is a 12V, 80A unit with an internal regulator. That makes it important to confirm the charging system arrangement on the vehicle rather than relying only on the general description. The supplied note also narrows the application to SLEEPER CAB air conditioning applications only, so that usage detail should be verified against the vehicle specification.

If you are replacing an existing Denso-style alternator, check the pin code IR11 and compare the original connector and mount arrangement as well as the physical dimensions. These checks are the most reliable way to reduce the risk of ordering the wrong unit, particularly when the vehicle may have multiple alternator configurations.

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 DXA4125RTE 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 One Year, Mount Leg Thickness 58mm, Power Rating (Amp) 80, Pulley Section AA, Suits Unit Make Denso, Note SLEEPER CAB Air Conditioning applications only, Mount Cnt to Cnt 160mm.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4125RTE, Brand OEX, Description OEX Alternator 12V 80A Denso Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR11, Pulley Outside Diameter 78mm, Regulator Type Internal, Voltage 12, Alternator Mount Single Leg.

OEX Alternator 12V 80A Denso Style. Part number DXA4125RTE should be checked first. Listed voltage is 12. Listed output rating is 80. 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 AA. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA4125RTE, 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 80 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching part number DXA4125RTE, Denso style application details, the IR11 pin code, and the listed mounting and pulley measurements to the unit already fitted to the vehicle. The application note states SLEEPER CAB air conditioning applications only.

FAQ

What is the part number for this alternator?

The part number is DXA4125RTE. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is a new alternator. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.

What is the output rating?

It is rated at 80 amps and operates on 12V. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.

What mounting style does it have?

It has a single leg alternator mount, with 160mm mount centre to centre and a 58mm mount leg thickness. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.

Are there any application limits noted?

Yes. The note states SLEEPER CAB air conditioning applications only, so that application detail should be confirmed before purchase. For this listing, part number DXA4125RTE is the main reference point. Listed voltage is 12. Listed output rating is 80. These details should still be checked against the original unit before ordering.