OEX Alternator 12V 150A Denso Style DXA4012

The OEX DXA4012 is a new 12V alternator rated at 150A and built in a Denso style configuration. It suits Denso unit applications and uses a quad leg alternator mount, with a 174mm mount centre to centre measurement and 37mm inside mounting legs for installation checking.

This unit is fitted with an internal regulator and a clutch style pulley. The pulley is 53mm outside diameter with a 7 groove pulley section, so the belt setup and pulley style need to match the vehicle application before purchase. The note supplied also states that this option does not replace DXA4049, which uses an RLO terminal regulator.

OEX positions this alternator as a new rotating electrical component sourced from original equipment manufacturers and aftermarket suppliers, with ISO9001 certified factory supply and a nationwide warranty backing. The warranty listed is 3 years for passenger use and 1 year for commercial use, which is useful to note when comparing this unit with other 12V 150A replacements.

Key Features

• New alternator, not remanufactured
• 12V, 150A output rating
• Denso style unit
• Internal regulator
• Clutch style pulley fitted
• 7 groove pulley section

Specifications

• Brand: OEX
• Part No.: DXA4012
• Product type: Alternator
• Voltage: 12V
• Power rating: 150A
• New / remanufactured: New
• Regulator type: Internal
• Alternator mount: Quad Leg

Fitment details supplied

• Compatible application data references Lexus GS models from 2012 to 2020
• Compatible application data references Lexus IS models, including 2013
• Compatible application data references Lexus RC models
• Compatible application data references Toyota Mark X models from 2004 to 2009
• Fitment must still be confirmed against the part number DXA4012, mount layout, pulley style, and regulator type

Application and Buying Notes

Before ordering, confirm the vehicle uses a Denso unit application and check the alternator mount details against the DXA4012 measurements: quad leg mount, 174mm mount centre to centre, 37mm inside mounting legs, M10x1.25 / 11 pivot hole, and M8x1.25 / 11 adjusting hole. These details matter because a Denso style alternator can still differ in mounting and terminal arrangement from other 12V 150A units.

The regulator type is internal, and the note specifically says this option does not replace DXA4049, which contains an RLO terminal regulator. That is an important compatibility checkpoint if the original vehicle uses an ECU controlled charging system or a different regulator terminal arrangement, because this alternator is listed as a standard voltage regulator rather than ECU controlled.

The pulley setup is also part of the buying decision. This alternator is fitted with a clutch style pulley, measures 53mm outside diameter, and uses a 7 groove pulley section. If the belt type, pulley depth, or groove count does not match the original equipment, the unit may not be suitable even if the overall alternator style appears similar.

For workshops and private buyers alike, the safest approach is to compare the part number, mount dimensions, pulley details, and regulator type before final purchase. The listed warranty of 3 years for passenger use and 1 year for commercial use applies to the OEX DXA4012, but it should not be used as a substitute for confirming the correct vehicle application first.

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 DXA4012 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 37mm, Pivot Hole Diameter M10x1.25 / 11, Pulley Outside Diameter 53mm, Regulator Type Internal, Voltage 12, Alternator Mount Quad Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4012, Brand OEX, Description OEX Alternator 12V 150A Denso Style, Adjusting Hole Diameter M8x1.25 / 11, Pin Code IR115, Power Rating (Amp) 150, Pulley Section 7 Groove, Suits Unit Make Denso.

OEX Alternator 12V 150A Denso Style. Part number DXA4012 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 Quad 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 DXA4012, 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.

Compatibility note: Please confirm fitment using part number DXA4012, the Denso application details, regulator type, pulley style, and the mounting measurements before ordering. Application data supplied references Lexus GS, Lexus IS, Lexus RC, and Toyota Mark X models, but final suitability still depends on the exact charging system and mounting arrangement.

FAQ

What type of alternator is the OEX DXA4012?

It is a new 12V alternator rated at 150A. It is described as a Denso style unit with an internal regulator and a clutch style pulley.

Does this alternator suit Denso applications?

Yes. The product is listed as suiting Denso unit applications. The mount and pulley details should still be checked against the vehicle before purchase.

What are the key mounting measurements?

The supplied measurements are a quad leg alternator mount, 174mm mount centre to centre, 37mm inside mounting legs, M10x1.25 / 11 pivot hole diameter, and M8x1.25 / 11 adjusting hole diameter.

What pulley details should I check?

This alternator has a 53mm outside diameter pulley, a 7 groove pulley section, and it is fitted with a clutch style pulley. Those details need to match the original application.

Is this a new unit or a remanufactured one?

It is listed as new, not remanufactured.

What warranty is listed for this alternator?

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