OEX Alternator 12V 150A Denso Style DXA4049

The OEX Alternator DXA4049 is a 12V, 150 amp unit built in a Denso style layout and supplied as a new alternator, not remanufactured. It is listed with an internal regulator, a twin leg alternator mount, and a 7 groove pulley section, so the physical configuration matters just as much as the electrical rating when checking replacement suitability.

This unit suits Denso applications and is noted as containing an ECU controlled voltage regulator. It is also described as not replacing DXA4012, which uses a standard voltage regulator. That distinction is important if you are matching a replacement by part number, because the regulator type is part of the application.

The alternator is supplied under the OEX brand, with a stated warranty of 3 years for passenger use and 1 year for commercial use. It weighs 6.1 kg and includes a clutch style pulley, with an adaptor noted to suit HXK-34, HXK-31 and HXK-29. Those details are useful checks before ordering, especially where mounting style, pulley type, or control system needs to match the vehicle exactly.

Key Features

• 12V alternator with 150A output
• New unit, not remanufactured
• Internal regulator
• Twin leg alternator mount
• 7 groove pulley section
• Clutch style pulley fitted

Specifications

• Brand: OEX
• Part No.: DXA4049
• Description: OEX Alternator 12V 150A Denso Style
• Type: Alternator
• Voltage: 12V
• Power rating: 150 amp
• Suits unit make: Denso
• Regulator type: Internal

Verified fitment references

• Lexus GS
• Lexus GS 2005
• Lexus GS 2006
• Lexus GS 2007
• Lexus GS 2008
• Lexus GS 2009
• Lexus GS 2010
• Lexus GS 2011

Application and Buying Notes

Before ordering, check the alternator part number, regulator type, and mounting measurements against the original unit. This OEX unit is DXA4049, uses an internal regulator, and is specifically noted as an ECU controlled voltage regulator unit. If the vehicle currently uses DXA4012 with a standard voltage regulator, this alternator is not a direct substitute.

Physical fit is just as important as electrical output. The mounting layout is a twin leg design with 37 mm inside mounting legs, 174 mm centre to centre, an 11 mm pivot hole, and an 8 mm adjusting hole. The pulley is a 53 mm unit with a 7 groove section, so belt alignment and pulley style should be checked against the removed alternator.

The alternator is listed as suitable for Denso applications, and the supplied adaptor is noted to suit HXK-34, HXK-31 and HXK-29. That makes it worth confirming the existing application and any adaptor requirement before purchase, particularly on vehicles where previous repairs, accessory changes, or engine swaps may have altered the original setup.

Weight is listed at 6.1 kg, which can be a useful reference when comparing against the original part or checking handling during installation. As with any charging system component, the safest approach is to match the part number first, then confirm the regulator control style, mount type, pulley section, and any adaptor notes before fitting.

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 DXA4049 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 11, Pulley Outside Diameter 53mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA4049, Brand OEX, Description OEX Alternator 12V 150A Denso Style, Adjusting Hole Diameter 8, Pin Code IR145, Power Rating (Amp) 150, Pulley Section 7 Groove, Suits Unit Make Denso.

OEX Alternator 12V 150A Denso Style. Part number DXA4049 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 Twin 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 DXA4049, 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 150 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include LEXUS GS, LEXUS GS 2005, LEXUS GS 2006, LEXUS GS 2007, TOYOTA MARK X, TOYOTA MARK X 2004. 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: Confirm compatibility using the part number DXA4049, the ECU controlled internal regulator, the twin leg mount measurements, and the 7 groove clutch pulley configuration before ordering. Do not rely on vehicle name alone.

FAQ

Is this alternator new or remanufactured?

It is listed as new, not remanufactured.

What is the output of this alternator?

The alternator is rated at 150 amp and is a 12V unit.

What part number should I use when checking fitment?

The listed part number is DXA4049.

Does this alternator use an internal regulator?

Yes. It is listed with an internal regulator and also noted as an ECU controlled voltage regulator unit.

Will it replace DXA4012?

No. It is specifically noted as not replacing DXA4012, which contains a standard voltage regulator.

Which applications are referenced in the fitment data?

The fitment references include Lexus GS from 2005 through 2011 and Toyota Mark X from 2004 through 2009.