OEX Alternator 12V 120A Bosch Style BXA4019

The OEX Alternator BXA4019 is a 12V, 120A unit with a Bosch style fitment profile, pad mount, internal regulator, and a 5 groove pulley. It is supplied new, weighs 6.64kg, and is identified with pin code IR120 for application checking.

This alternator is listed with a mount centre measurement of 172mm and mount centre to centre of 164mm, plus a 79mm mount leg thickness. The adjusting hole diameter and pivot hole diameter are both listed as 9 / 10, and the pulley outside diameter is 56mm.

For buyers comparing replacements, the important points here are voltage, amperage, mounting style, pulley configuration, and the Bosch unit make reference. Matching those details to the vehicle’s original unit helps reduce the chance of ordering the wrong alternator.

OEX states its products are sourced from market leading Original Equipment Manufacturers and aftermarket suppliers, with ISO9001 certified factories supporting engineering, testing, and quality control procedures. This unit carries a 3yr Passenger 1yr Commercial warranty.

Key Features

• 12V alternator rated at 120A
• Bosch style unit with pad mount
• Internal regulator fitted
• 5 groove pulley
• New unit, not remanufactured
• Part number BXA4019

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 12V
• Power rating: 120 amp
• Unit of measure: Each
• Suits unit make: Bosch
• Alternator mount: Pad
• Pulley section: 5 groove

Known fitment references

• AUDI A6
• HOLDEN ASTRA
• HOLDEN VECTRA
• HOLDEN ZAFIRA
• SAAB 9-3X

Application and Buying Notes

When comparing this alternator to the one already on the vehicle, start with the Bosch style identification, 12V system voltage, 120A output, pad mount, and 5 groove pulley. Those details are the most useful first checks before looking further into dimensions such as the 172mm mount centres B, 164mm mount centre to centre, and 56mm pulley outside diameter.

The part number BXA4019 and pin code IR120 are practical reference points for confirming application. If the original alternator carries different mounting measurements, a different pulley section, or another regulator arrangement, it should be checked carefully before purchase rather than assumed to interchange.

This alternator is listed as new, which may matter if you are replacing an older remanufactured unit or want a fresh replacement rather than a rebuilt assembly. The internal regulator also needs to align with the vehicle’s charging system layout, so it is worth confirming the existing configuration before fitting.

The stated mount leg thickness of 79mm, along with the 9 / 10 adjusting and pivot hole diameters, gives a more complete picture for installers working from the physical unit. These measurements can be especially useful when matching against the old alternator on the bench or confirming whether brackets and mounting points line up as expected.

OEX identifies this unit as suitable for Bosch style applications, and the known fitment references include Audi A6, Holden Astra, Holden Vectra, Holden Zafira, and Saab 9-3X. Even so, the correct match still comes down to the exact application details on the vehicle, not just the make or model name alone.

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 BXA4019 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, Mount Centres B 172mm, Pin Code IR120, Power Rating (Amp) 120, Pulley Section 5 Groove, Suits Unit Make Bosch, Alternator Mount Pad, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BXA4019, Brand OEX, Description OEX Alternator 12V 120A Bosch Style, Adjusting Hole Diameter 9 / 10, Mount Leg Thickness 79mm, Pivot Hole Diameter 9 / 10, Pulley Outside Diameter 56mm, Regulator Type Internal.

OEX Alternator 12V 120A Bosch Style. Part number BXA4019 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 Pad. Regulator type is Internal. Pulley configuration is 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXA4019, 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 120 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include AUDI A6, AUDI A6 2008, AUDI A6 2009, AUDI A6 2010, HOLDEN ASTRA, HOLDEN ASTRA 2000. 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 fitment by checking the vehicle’s original alternator part number, Bosch style application details, mount measurements, pulley section, and regulator type against BXA4019 / IR120 before ordering.

FAQ

What is the output rating of this alternator?

It is rated at 120 amp and listed as a 12V alternator.

Is this alternator new or remanufactured?

It is listed as new.

What pulley setup does it use?

It has a 5 groove pulley, and the pulley outside diameter is listed as 56mm.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What part number should I use to confirm the unit?

The part number is BXA4019, and the pin code is IR120.

Which vehicles are mentioned in the fitment references?

The known fitment references include Audi A6, Holden Astra, Holden Vectra, Holden Zafira, and Saab 9-3X. Final fitment should still be confirmed against the vehicle’s original unit and measurements.