OEX Alternator 12V 70A Bosch Style BXA039

The OEX Alternator BXA039 is a new 12V, 70A unit built in Bosch style and supplied as a single leg alternator with internal regulator. It is listed with a 5 groove pulley, 56mm pulley outside diameter, and clockwise rotation, so those details should be checked against the unit being replaced before ordering.

This alternator suits Bosch applications and carries mounting measurements that matter during replacement, including 58mm mount leg thickness, 10mm pivot hole diameter, M8 x 1.25 adjusting hole diameter, and 160mm mount centre to centre. Those measurements are often the difference between a straightforward swap and a part that will not line up correctly.

As a new rotating electrical component, this OEX alternator is covered by a 3 year passenger and 1 year commercial warranty. It is supplied each, weighs 9.3kg, and is identified by part number BXA039 and pin code IR110, which are useful reference points when confirming the correct replacement.

OEX states its product range is sourced from market leading original equipment manufacturers and aftermarket suppliers, with factories that are ISO9001 certified. For buyers replacing a Bosch style alternator, the practical checks remain the same: voltage, amperage, mounting arrangement, pulley specification, rotation, and part number.

Key Features

• 12V, 70A alternator
• Bosch style replacement
• New unit, not remanufactured
• Internal regulator
• Single leg alternator mount
• 5 groove pulley

Specifications

• Part No.: BXA039
• Pin Code: IR110
• Voltage: 12V
• Power Rating: 70A
• Regulator Type: Internal
• Pulley Outside Diameter: 56mm
• Pulley Section: 5 Groove
• Rotation: CW

Fitment guidance

• Verified fitment references include Holden Nova and Toyota Corolla applications.
• Additional fitment references include Toyota Corolla Levin and Toyota Sprinter Trueno.
• Application data also lists Toyota Corolla across multiple model years, including 1970 to 1974 and 1988 to 1993, and Holden Nova across 1989 to 1994.
• Fitment should still be confirmed by part number, mounting measurements, pulley type, and regulator arrangement before purchase.

Application and Buying Notes

Before ordering, compare the part number BXA039 and pin code IR110 with the unit currently fitted to the vehicle. The Bosch style body, 12V system, 70A output, and internal regulator all need to match the application, because alternators with similar appearance can still differ in mounting and wiring details.

The physical mounting details are especially important on this unit. Check the single leg mount, 58mm mount leg thickness, 10mm pivot hole, M8 x 1.25 adjusting hole, and 160mm centre-to-centre mounting dimension. If those measurements do not align with the existing bracket and adjuster setup, the alternator may not install correctly.

Also confirm the pulley specification. This alternator has a 5 groove pulley with a 56mm outside diameter and clockwise rotation. Belt groove count, pulley diameter, and rotation direction need to match the engine setup, otherwise belt alignment and charging operation can be affected.

This is a new alternator and is supplied with a 3 year passenger and 1 year commercial warranty. That warranty covers the product category as supplied, but it does not replace the need to verify application details before fitting, especially on Bosch style systems where mounting and pulley variations can exist.

If you are cross-checking against a removed unit, use the listed measurements rather than appearance alone. The 9.3kg weight, single leg mount, and internal regulator are useful identifiers when comparing like-for-like parts in the workshop or at the counter.

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 BXA039 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 Leg Thickness 58mm, Pivot Hole Diameter 10, Pulley Outside Diameter 56mm, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BXA039, Brand OEX, Description OEX Alternator 12V 70A Bosch Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR110, Power Rating (Amp) 70, Pulley Section 5 Groove, Rotation CW.

OEX Alternator 12V 70A Bosch Style. Part number BXA039 should be checked first. Listed voltage is 12. Listed output rating is 70. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single Leg. 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 BXA039, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching part number BXA039, pin code IR110, the Bosch style application, and the listed mounting and pulley measurements to the vehicle’s existing alternator before ordering or fitting.

FAQ

Is this alternator new or remanufactured?

This OEX alternator is listed as new, not remanufactured.

What is the output rating?

It is rated at 70A and operates on a 12V system.

What regulator type does it use?

It uses an internal regulator.

What pulley setup does it have?

It has a 5 groove pulley with a 56mm outside diameter and clockwise rotation.

Which part number should I use when checking fitment?

The listed part number is BXA039, and the pin code is IR110.

What warranty is supplied with this alternator?

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