OEX Alternator 12V 120A Delphi Style DXA603

The OEX Alternator 12V 120A Delphi Style, part number DXA603, is a new alternator for 12-volt charging systems where a Delphi-style unit is required. It is rated at 120 amps and uses an internal regulator, so matching the electrical and mounting details matters just as much as the brand name when replacing the original unit.

This alternator is listed with a twin leg mount, 184mm mount centre to centre, 58.5mm inside mounting legs, and a 10mm pivot hole diameter. It also has an M8 x 1.25 adjusting hole, a 6 groove pulley, and a 56mm pulley outside diameter, which are all important checks before ordering or fitting.

OEX describes its alternator range as quality-focused aftermarket equipment, with factories ISO9001 certified for engineering, testing, and quality control procedures. The product is backed by a 3 year passenger / 1 year commercial warranty, and it weighs 6kg as supplied.

For buyers comparing replacement options, the key identifiers here are the OEX brand, DXA603 part number, Delphi suitability, 12V operating voltage, and 120A output. Those details are the most useful starting point when confirming whether the alternator matches the vehicle application and the original installation pattern.

Key Features

• 12V alternator with 120A power rating
• Delphi style unit
• New replacement alternator
• Internal regulator
• Twin leg alternator mount
• 6 groove pulley

Specifications

• Brand: OEX
• Part No.: DXA603
• Product type: Alternator
• Voltage: 12V
• Power rating: 120A
• Suits unit make: Delphi
• Alternator mount: Twin leg
• Inside mounting legs: 58.5mm

Verified fitment

• HOLDEN Captiva 5
• HOLDEN Captiva 7
• Holden Captiva 5 2009, 2010, 2011
• Holden Captiva 7 2011, 2012, 2013, 2014, 2015, 2016, 2017

Application and Buying Notes

Before ordering, compare the part number DXA603, the Delphi style designation, and the mounting measurements against the alternator already on the vehicle. The critical dimensions shown here are the 184mm mount centre to centre, 58.5mm inside mounting legs, 10mm pivot hole, and M8 x 1.25 adjusting hole, because those details determine whether the unit physically lines up with the brackets and adjuster.

Electrical compatibility is just as important as the mechanical side. This alternator is a 12V unit with a 120A output, an internal regulator, a 6 groove pulley, and a 56mm pulley outside diameter. If the vehicle uses a different voltage, regulator arrangement, pulley section, or pulley size, it should be checked carefully before purchase or installation.

The listed application information supports Holden Captiva 5 and Holden Captiva 7, including Captiva 5 model years 2009 to 2011 and Captiva 7 model years 2011 to 2017. Even with that application guidance, it is still best practice to confirm the original alternator details directly against the vehicle and compare them with the DXA603 specifications, especially where build dates or electrical configurations can vary.

For workshops and owners alike, the safest approach is to verify the mounting style, pulley arrangement, and electrical specification together rather than relying on one detail alone. The fact that this is a new OEX alternator with a 3 year passenger / 1 year commercial warranty provides a useful commercial reference, but it does not replace a fitment check against the existing 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 DXA603 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 58.5mm, Pivot Hole Diameter 10, Pulley Outside Diameter 56mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 184mm, Insulated Return No.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA603, Brand OEX, Description OEX Alternator 12V 120A Delphi Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR153, Power Rating (Amp) 120, Pulley Section 6 Groove, Suits Unit Make Delphi.

OEX Alternator 12V 120A Delphi Style. Part number DXA603 should be checked first. Listed voltage is 12. Listed output rating is 120. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA603, 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: Confirm fitment using the part number DXA603, the Delphi style designation, and the listed mounting and electrical specifications before ordering. Application details are provided for Holden Captiva 5 and Holden Captiva 7, but the final check should always be against the vehicle currently being worked on.

FAQ

What is the part number for this alternator?

The part number is DXA603.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with a 120A power rating.

What type of regulator does it use?

It uses an internal regulator.

What vehicles are listed in the fitment information?

The listed applications include Holden Captiva 5 and Holden Captiva 7, with sample years shown for Captiva 5 from 2009 to 2011 and Captiva 7 from 2011 to 2017.

What should I check before buying?

Check the part number DXA603, the Delphi style designation, the twin leg mount, the 184mm mount centre to centre, the 58.5mm inside mounting legs, the 10mm pivot hole, the M8 x 1.25 adjusting hole, and the 6 groove 56mm pulley details against the existing unit.