Bosch Alternator 12V 70A BXF1238A

Bosch alternator, 12V 70A, part number BXF1238A. This is a new unit sold each, with a one-year warranty, and it is listed as a Bosch-made alternator for the rotating electrical system. The regulator type is internal, which is an important detail when checking replacement compatibility.

Key mounting and sizing details are provided for identification before purchase: single leg alternator mount, mount leg thickness 76mm, mount centre to centre 168mm, adjusting hole diameter 3/8 UNC, and pivot hole diameter 16 UNC. The pulley is A section with an outside diameter of 82mm.

The alternator is rated at 70 amps at 12 volts and weighs 8.4kg. It is described as corrosion resistant and made from high quality raw materials for long life and consistent performance, with a reduction drive designed to maintain continual speeds for easier starting. Those points make it worth matching carefully to the existing unit rather than assuming a direct swap from appearance alone.

Key Features

• 12V alternator with 70A output
• New unit, sold each
• Internal regulator type
• Single leg alternator mount
• A section pulley, 82mm outside diameter
• Corrosion resistant construction

Specifications

• Brand: Bosch
• Part number: BXF1238A
• Product type: Alternator
• Voltage: 12V
• Power rating: 70 amp
• Mount leg thickness: 76mm
• Mount centre to centre: 168mm
• Adjusting hole diameter: 3/8 UNC

Fitment guidance

• Fitment data includes Ford applications.
• Ford Bronco appears in the supplied application list, with sample listings shown for 1981, 1982, 1983, 1984, 1985, 1986 and 1987.
• Other Ford names appear in the fitment group preview, including Cortina, F-100, F-150, F-250, F-350, Fairlane, Fairmont, Falcon, Galaxie, Landau and LTD.
• Match the part number BXF1238A and the mounting measurements before ordering, as the fitment list is broad and vehicle-specific details still need checking.

Application and Buying Notes

For a reliable replacement, compare the part number BXF1238A against the original alternator first, then confirm the mounting style. This unit is a single leg alternator with a 76mm mount leg thickness and 168mm mount centre to centre, so those measurements are a practical check before you order.

The electrical side also matters. This alternator is rated at 12V and 70A, with an internal regulator. If the vehicle uses a different output, regulator arrangement, or pulley setup, the part may look similar but still not suit the application correctly.

Pulley size and section are also worth checking. The listed pulley is A section with an 82mm outside diameter, so belt type and alignment should be confirmed against the existing unit. The adjusting hole diameter is 3/8 UNC and the pivot hole diameter is 16 UNC, which are useful when comparing bracket and fastener requirements.

If you are replacing an older alternator, check whether the existing unit is also a Bosch unit and whether the fitment follows the same mount and pulley details. The supplied fitment information points to Ford applications, but the correct selection still depends on the specific vehicle and installed components.

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 BXF1238A 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 One Year, Mount Leg Thickness 76mm, Power Rating (Amp) 70, Pulley Section A, Suits Unit Make Bosch, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BXF1238A, Brand BOSCH, Description Bosch Alternator 12V 70A, Adjusting Hole Diameter 3/8 UNC, Pivot Hole Diameter 16 UNC, Pulley Outside Diameter 82mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 168mm.

Bosch Alternator 12V 70A. Part number BXF1238A 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXF1238A, 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.

Available application references include FORD BRONCO, FORD BRONCO 1981, FORD BRONCO 1982, FORD BRONCO 1983. 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 BXF1238A, 12V 70A rating, internal regulator type, single leg mount, pulley section A, and the listed mounting measurements against the vehicle and existing alternator before purchase.

FAQ

What is the part number for this alternator?

The part number is BXF1238A.

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 70 amp power rating.

What type of regulator does it use?

It uses an internal regulator.

What mounting details are listed?

The alternator has a single leg mount, 76mm mount leg thickness, 168mm mount centre to centre, a 3/8 UNC adjusting hole diameter, and a 16 UNC pivot hole diameter.

Which vehicles are shown in the fitment information?

The supplied fitment information includes Ford applications, with Ford Bronco shown in sample listings and other Ford names such as Cortina, F-100, F-150, F-250, F-350, Fairlane, Fairmont, Falcon, Galaxie, Landau and LTD appearing in the grouped preview.