OEX Alternator 12V 120A Bosch Style BXA042

The OEX Alternator BXA042 is a new 12V, 120A rotating electrical unit built in Bosch style with an internal regulator and twin leg alternator mount. It is listed with a 4 groove pulley, CW rotation, 67mm pulley outside diameter, and a 7.5kg unit weight, so it is important to compare the mounting and pulley details against the vehicle before ordering.

This alternator suits Bosch applications and uses an inside mounting leg spacing of 32mm, a 10.5mm pivot hole diameter, an M8 x 1.25 adjusting hole diameter, and a 184mm mount centre-to-centre measurement. Those dimensions are the practical checkpoints that help confirm whether the unit matches the original alternator layout already fitted to the vehicle.

OEX supplies rotating electrical components from market-leading original equipment manufacturers and aftermarket suppliers, with product sourced from ISO9001 certified factories. For this alternator, the listed warranty is 3 years for passenger use and 1 year for commercial use, which is a useful reference when comparing rebuild, remanufactured, and new replacement options.

Key Features

• New alternator, not remanufactured
• 12V system with 120A power rating
• Bosch style unit with internal regulator
• Twin leg alternator mount
• 4 groove pulley
• Clockwise rotation

Specifications

• Brand: OEX
• Product type: Alternator
• Unit of measure: Each
• Voltage: 12
• Amperage: 120A
• Suits unit make: Bosch
• New / Reman.: New
• Regulator type: Internal

Fitment guidance

• Supported fitment families include Holden Calais, Holden Commodore, and HSV models including ClubSport, LS, Maloo, Manta, Senator, and XU8.
• The provided fitment preview includes model years such as 1990, 1991, 1992, 1997, 1998, 1999, 2000, 2001, and 2002 in the Holden and HSV ranges shown.
• Fitment should still be checked against the original alternator part number, mounting style, pulley section, regulator type, and the mounting measurements listed for BXA042.

Application and Buying Notes

Before buying, check that your existing alternator is a Bosch style unit with a twin leg mount, 12V charging system, and a 4 groove pulley. The key measurements for comparison are the 32mm inside mounting legs, 10.5mm pivot hole diameter, M8 x 1.25 adjusting hole, and the 184mm mount centre-to-centre dimension.

The 120A output is a useful indicator of electrical capacity, but it should not be treated as a substitute for physical fitment checks. If the original alternator has a different regulator arrangement, mounting pattern, pulley section, or rotation direction, the unit may not be suitable even if the vehicle family appears in the fitment list.

This alternator is listed as new and weighs 7.5kg, which can help when comparing it with the original part at the vehicle or over the counter. The part number BXA042 and pin code IR110 are the strongest identifiers to use when matching against the existing unit or parts catalogue.

If the vehicle has already been modified, or if the old alternator has been replaced before, confirm the shape of the housing, the pulley alignment, and the electrical plug arrangement before fitting. Those checks matter because Bosch style alternators can share a general appearance while still differing in mounting and terminal details.

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 BXA042 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 32mm, Pivot Hole Diameter 10.5, Pulley Outside Diameter 67mm, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BXA042, Brand OEX, Description OEX Alternator 12V 120A Bosch Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR110, Power Rating (Amp) 120, Pulley Section 4 Groove, Rotation CW.

OEX Alternator 12V 120A Bosch Style. Part number BXA042 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 4 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXA042, 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 HOLDEN CALAIS, HOLDEN CALAIS 1997, HOLDEN CALAIS 1998, HOLDEN CALAIS 1999, HSV CLUBSPORT, HSV CLUBSPORT 1997. 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 by matching part number BXA042, Bosch style application details, the twin leg mount, and the listed dimensions before ordering.

FAQ

Is this alternator new or remanufactured?

This OEX alternator is listed as new, not remanufactured.

What is the electrical output?

The power rating is 120A at 12V.

What style of alternator is it?

It is a Bosch style alternator with an internal regulator and twin leg mount.

What pulley details are listed?

The pulley is listed as 4 groove, with a 67mm outside diameter.

Which part number should I use to match it?

The listed part number is BXA042, and the pin code is IR110.

Does the listing include any fitment families?

Yes. The supported fitment families shown include Holden Calais, Holden Commodore, and HSV models such as ClubSport, LS, Maloo, Manta, Senator, and XU8. Final checking should still be done against the part number and the listed dimensions.