OEX Alternator 12V 100A Delphi Style DXA499

The OEX Alternator DXA499 is a new 12V, 100A unit built in a Delphi style layout for applications that suit the Delphi alternator mount pattern. It uses a twin leg mount, internal regulator, 6 groove pulley and 135mm centre-to-centre mount spacing, so matching those physical details is essential before purchase.

This alternator is listed with an inside mounting legs measurement of 55mm, pivot hole diameter of M10x1.5 / 10, adjusting hole diameter of M10x1.5 / 10, and a 53mm pulley outside diameter. Those dimensions are the key checkpoints when comparing against the unit already fitted to the vehicle.

The OEX range is positioned as an aftermarket option with a focus on quality and reliability, and this alternator is backed by a 3 year passenger / 1 year commercial warranty. For workshop or driveway replacement, the important point is to confirm both the electrical rating and the physical mount style before ordering.

Key Features

• 12V alternator with 100A output
• Delphi style unit
• Internal regulator
• Twin leg alternator mount
• 6 groove pulley
• New unit

Specifications

• Part No.: DXA499
• Brand: OEX
• Voltage: 12V
• Power Rating: 100A
• Regulator Type: Internal
• Pulley Section: 6 Groove
• Pulley Outside Diameter: 53mm
• Alternator Mount: Twin Leg

Fitment guidance

• Verified fitment groups include Holden and Opel applications.
• Listed fitment makes include Holden Astra, Holden Barina, Holden Cruze, Holden Trax, Opel Astra and Opel Corsa.
• Sample applications shown include Holden Astra 2014, 2015 and 2016, Holden Barina 2011 to 2017, Opel Astra 2012 and 2013, and Opel Corsa 2012 and 2013.
• Fitment data is broad across multiple model lines, so the alternator should be matched by part number and mounting details as well as vehicle make and model.
• Check the pulley type, mount spacing, regulator type and hole sizes against the unit being replaced before ordering.

Application and Buying Notes

For a reliable match, compare the DXA499 part number with the alternator currently fitted, then confirm the Delphi style mount, twin leg configuration and 135mm centre-to-centre measurement. The 55mm inside mounting legs and M10x1.5 / 10 pivot and adjusting holes are practical identifiers that help rule out mismatches.

The 100A rating and 12V system specification matter because the alternator must suit the vehicle’s charging requirements as well as the mounting layout. If the vehicle uses a different pulley section, different regulator arrangement or different bracket spacing, the alternator may not be suitable even if the model name appears similar.

This unit weighs 5.4kg and uses a 53mm, 6 groove pulley, so it is worth checking belt alignment and pulley profile against the removed part. In alternator replacement work, the safest approach is to verify every physical point of comparison before the unit is installed.

OEX positions this alternator as a new aftermarket replacement backed by a 3 year passenger / 1 year commercial warranty. That warranty support is valuable, but it does not replace the need to confirm the correct application details, particularly where multiple Holden and Opel variants are listed in the fitment data.

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 DXA499 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 55mm, Pivot Hole Diameter M10x1.5 / 10, Pulley Outside Diameter 53mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 135mm, Weight 5.4kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. DXA499, Brand OEX, Description OEX Alternator 12V 100A Delphi Style, Adjusting Hole Diameter M10x1.5 / 10, Pin Code IR127, Power Rating (Amp) 100, Pulley Section 6 Groove, Suits Unit Make Delphi, Alternator Mount Twin Leg.

OEX Alternator 12V 100A Delphi Style. Part number DXA499 should be checked first. Listed voltage is 12. Listed output rating is 100. 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 DXA499, 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 100 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by checking part number DXA499, the Delphi style twin leg mount, 135mm centre-to-centre spacing, 55mm inside mounting legs, M10x1.5 / 10 hole sizes, 53mm 6 groove pulley, and the vehicle application before purchase.

FAQ

What type of alternator is this?

It is a new OEX alternator, 12V and 100A, in a Delphi style configuration with an internal regulator and twin leg mount.

What is the part number?

The part number is DXA499.

What vehicles does it suit?

Listed fitment includes Holden and Opel applications, including Holden Astra, Holden Barina, Holden Cruze, Holden Trax, Opel Astra and Opel Corsa. Specific year examples shown include Holden Astra 2014 to 2016, Holden Barina 2011 to 2017, Opel Astra 2012 to 2013 and Opel Corsa 2012 to 2013.

What are the main mounting measurements?

The alternator has 135mm centre-to-centre mounting, 55mm inside mounting legs, M10x1.5 / 10 pivot hole diameter and M10x1.5 / 10 adjusting hole diameter.

What pulley does it use?

It uses a 6 groove pulley with a 53mm outside diameter.

What warranty is supplied?

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