Bosch Alternator 12V 120A BXH1250A

The Bosch BXH1250A alternator is a new 12V, 120A unit with an internal regulator and twin leg mount. It is listed with a 74mm pulley outside diameter, 32mm inside mounting legs, and an M10x1.5 / 10 pivot hole diameter, so the mounting dimensions are worth checking against the vehicle before ordering.

This alternator is noted as suitable for Holden HSV applications with the VU 5.0L engine. The fitment information supplied also references a broader Holden and HSV application range, so confirming the exact vehicle, engine, and mounting arrangement against the part number BXH1250A is the safest way to buy.

Bosch lists this unit as high output and new, with long-lasting premium bearings and non-recycled copper used in the build. The regulator is designed for the vehicle application, which is an important detail when matching charging system parts to the correct car.

At 6.48kg, this is a substantial rotating electrical component, so it is worth comparing the mounting style, pulley section, and adjuster hole size before installation. The alternator is supplied under Bosch branding with part number BXH1250A and is also associated with pin code IR110 and adaptor note HXK-33, HXK-20, 1287013003.

Key Features

• New Bosch alternator
• 12V, 120A output
• Internal regulator
• Twin leg alternator mount
• 74mm pulley outside diameter
• 32mm inside mounting legs

Specifications

• Brand: Bosch
• Part No.: BXH1250A
• Product type: Alternator
• Voltage: 12V
• Power rating: 120A
• New / Reman.: New
• Regulator type: Internal
• Alternator mount: Twin leg

Verified fitment references

• To suit: Holden HSV with VU, 5.0L engine
• Fitment references supplied for Holden and HSV models, including Calais, Caprice, Commodore, Statesman, ClubSport, Grange, Maloo, Manta, Senator, and HSV Statesman
• Adaptor note: HXK-33, HXK-20, 1287013003

Application and Buying Notes

Before ordering, compare the Bosch part number BXH1250A with your existing alternator and check the mounting layout closely. The supplied dimensions matter here: twin leg mount, 32mm inside mounting legs, 184mm mount centre to centre, M10x1.5 / 10 pivot hole, and M8x1.25 adjusting hole.

The 12V, 120A rating is the key electrical specification for this unit. If the vehicle was fitted with a different output alternator, or if the pulley and bracket arrangement differ, the correct match may depend on the exact application rather than the vehicle badge alone.

The note listing adaptor references HXK-33, HXK-20, and 1287013003 is also worth checking during selection. That kind of application detail can matter where the alternator physically fits but the mounting or accessory arrangement needs an adaptor to suit.

As with any charging system part, it is best to confirm the alternator mount, pulley section, and regulator type before fitting. This Bosch unit uses an internal regulator and an A-section pulley, so those details should line up with the vehicle application and the removed part.

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 BXH1250A 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, Inside Mounting Legs 32mm, Pivot Hole Diameter M10x1.5 / 10, Pulley Outside Diameter 74mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BXH1250A, Brand BOSCH, Description Bosch Alternator 12V 120A, Adjusting Hole Diameter M8x1.25, Pin Code IR110, Power Rating (Amp) 120, Pulley Section A, Suits Unit Make Bosch.

Bosch Alternator 12V 120A. Part number BXH1250A 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXH1250A, 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.

Compatibility note: Please confirm fitment by matching part number BXH1250A, the listed mounting dimensions, and the specific vehicle application before purchase.

FAQ

What is the part number for this Bosch alternator?

The part number listed is BXH1250A. For this listing, part number BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. These details should still be checked against the original unit before ordering.

What is the electrical output of this alternator?

It is rated at 12V and 120A. For this listing, part number BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. 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 BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. 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 BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. These details should still be checked against the original unit before ordering.

What vehicle application is specifically mentioned?

It is noted to suit Holden HSV with VU, 5.0L engine. For this listing, part number BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. These details should still be checked against the original unit before ordering.

Are there mounting dimensions provided to help check fitment?

Yes. Listed dimensions include 32mm inside mounting legs, M10x1.5 / 10 pivot hole diameter, M8x1.25 adjusting hole diameter, and 184mm mount centre to centre. For this listing, part number BXH1250A is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include HOLDEN CALAIS, HOLDEN CALAIS 1995, HOLDEN CALAIS 1996. These details should still be checked against the original unit before ordering.