Bosch Alternator 12V 70A BXH1238A

The Bosch BXH1238A is a new 12V, 70A alternator supplied as an each unit, with a single-leg alternator mount and a 1-year warranty. It is listed as suited to early Holden 6 cylinder applications, so the key check before ordering is whether your vehicle uses the same mounting layout, pulley style, and electrical setup.

This alternator uses an internal regulator and an A-section pulley with a 64mm outside diameter. Important mounting dimensions include a 56mm mount leg thickness, 170mm mount centre-to-centre, a 9.5 pivot hole diameter, and an M8 x 1.25 adjusting hole diameter. Those measurements matter when matching the alternator to the bracket and belt arrangement already on the vehicle.

Bosch lists this unit as made from high quality raw materials, with non-recycled copper, vehicle-specific regulators, and long lasting premium bearings. The alternator weighs 9.21kg and is identified by part number BXH1238A, which is the safest reference to confirm before purchase if you are matching an existing unit.

Key Features

• 12V alternator with 70A output
• New unit, supplied each
• Single-leg alternator mount
• Internal regulator
• A-section pulley, 64mm outside diameter
• Made for early Holden 6 cylinder applications

Specifications

• Brand: Bosch
• Part No.: BXH1238A
• Voltage: 12V
• Power Rating: 70A
• Type: Alternator
• Condition: New
• Unit of Measure: Each
• Regulator Type: Internal

Confirmed fitment guidance

• To suit: Early Holden 6 cyl applications

Application and Buying Notes

Before ordering, compare the Bosch part number BXH1238A with the alternator you are replacing. The mounting style is single leg, and the listed measurements are specific: 56mm mount leg thickness, 170mm mount centre-to-centre, 9.5mm pivot hole diameter, and M8 x 1.25 adjusting hole diameter. If any of those points differ on your vehicle, the part may not be a direct match.

The pulley arrangement also needs checking. This unit has an A-section pulley with a 64mm outside diameter, so belt profile and pulley diameter should be matched carefully against the existing setup. The internal regulator is another important detail, because the charging system must suit the vehicle application rather than relying on a generic alternator shape alone.

The listed 12V, 70A rating should be considered alongside the vehicle’s original electrical requirements. This is a new alternator, not a remanufactured unit, and it is supplied as an each item. If you are replacing an existing Bosch alternator, the part number and physical measurements are the most dependable checks before finalising the order.

Bosch states this alternator uses non-recycled copper and premium quality bearings, with regulators designed for the vehicle application. Those details may be useful if you are comparing build quality between replacement options, but the practical buying decision should still come down to fitment, regulator type, mounting dimensions, and pulley match.

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 BXH1238A 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 56mm, Power Rating (Amp) 70, Pulley Section A, Suits Unit Make Bosch, Alternator Mount Single Leg, New / Reman. New, Weight 9.21kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. BXH1238A, Brand BOSCH, Description Bosch Alternator 12V 70A, Adjusting Hole Diameter M8 x 1.25, Pivot Hole Diameter 9.5, Pulley Outside Diameter 64mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 170mm.

Bosch Alternator 12V 70A. Part number BXH1238A 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 BXH1238A, 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: Please confirm fitment using part number BXH1238A, the single-leg mount style, and the listed mounting and pulley dimensions before ordering. Vehicle compatibility should always be checked against the existing alternator and application details, especially on early Holden 6 cylinder vehicles.

FAQ

What is the part number for this alternator?

The part number is BXH1238A. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 70A power rating. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.

What mounting style does it have?

It has a single-leg alternator mount. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.

What vehicles is it listed to suit?

It is listed to suit early Holden 6 cylinder applications. Fitment should still be confirmed against the part number and the listed mounting and pulley dimensions. For this listing, part number BXH1238A is the main reference point. Listed voltage is 12. Listed output rating is 70. Published fitment references include HDT BROCK, HDT BROCK 1984, HDT BROCK 1985. These details should still be checked against the original unit before ordering.