Bosch Alternator 12V 100A BXH1240N

Bosch Alternator 12V 100A, part number BXH1240N, is a new 12-volt alternator with a 100 amp power rating. It is supplied as a single unit and carries a one year warranty, making it a straightforward replacement option where the electrical specifications and mounting style match the vehicle.

This alternator uses an internal regulator, CW rotation, and an A-section pulley. The mounting layout is a twin leg alternator mount with 81mm inside mounting legs, 175mm mount centre to centre, and a 10mm adjusting hole diameter. Those dimensions are important when checking whether the unit will physically suit the application.

It is described as Bosch unit make, Bosch brand, and part of the rotating electrical product group. For buyers comparing replacements, the combination of 12V, 100A output, internal regulation, and the BXH1240N part number are the key identifiers to confirm before ordering.

Key Features

• 12V alternator with 100A output
• New unit, supplied each
• Internal regulator
• Twin leg alternator mount
• CW rotation
• A-section pulley

Specifications

• Brand: Bosch
• Part No.: BXH1240N
• Voltage: 12V
• Power rating: 100A
• New / Reman.: New
• Regulator type: Internal
• Alternator mount: Twin leg
• Inside mounting legs: 81mm

Fitment notes

• NISSAN: PATROL, PATROL 1999, PATROL 2000, PATROL 2001, PATROL 2002, plus other listed applications

Application and Buying Notes

Before ordering, compare the part number BXH1240N with the alternator currently fitted to the vehicle. Part number matching is the safest starting point because the electrical output, regulator type, pulley section, and mounting dimensions all need to line up with the existing setup.

The important physical checks on this unit are the 81mm inside mounting legs, 175mm mount centre to centre, and 10mm adjusting hole diameter. If any of those measurements differ from the vehicle’s bracket arrangement, the alternator may not install correctly even if the electrical rating looks close.

The 100A output and internal regulator suit applications designed for a 12V charging system. It is not wise to assume compatibility from appearance alone, because alternators can share similar housings while differing in mounting, pulley, or regulation details.

This alternator is listed with CW rotation and an A-section pulley, so the belt drive arrangement also needs to be checked. Matching the pulley section and rotation is just as important as matching the mounting legs, particularly where the original alternator has been changed previously.

For buyers who are replacing a tired or failed alternator, the one year warranty provides a clear reference point, but it does not replace the need to confirm fitment. The best result comes from checking the existing unit, the vehicle application, and the BXH1240N part number together before purchase.

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 BXH1240N 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 81mm, Power Rating (Amp) 100, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Twin Leg, New / Reman. New, Product Group 1 ROTATING ELECTRICAL.

Additional published details for cross-checking include Part No. BXH1240N, Brand BOSCH, Description Bosch Alternator 12V 100A, Adjusting Hole Diameter 10, Pin Code IR49, Pulley Section A, Rotation CW, Voltage 12, Mount Cnt to Cnt 175mm.

Bosch Alternator 12V 100A. Part number BXH1240N should be checked first. Listed voltage is 12. Listed output rating is 100. 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 BXH1240N, 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.

Compatibility note: Confirm fitment by comparing the BXH1240N part number, 12V 100A rating, internal regulator, twin leg mount, 81mm inside mounting legs, 175mm mount centre to centre, 10mm adjusting hole, CW rotation, and A-section pulley against the vehicle’s original alternator and mounting arrangement.

FAQ

What is the part number for this Bosch alternator?

The part number is BXH1240N. For this listing, part number BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. These details should still be checked against the original unit before ordering.

What are the electrical specifications?

It is a 12V alternator with a 100A power rating and an internal regulator. For this listing, part number BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. 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 BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. These details should still be checked against the original unit before ordering.

What mounting details are provided?

It uses a twin leg alternator mount, with 81mm inside mounting legs, 175mm mount centre to centre, and a 10mm adjusting hole diameter. For this listing, part number BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. These details should still be checked against the original unit before ordering.

What pulley and rotation details are listed?

The pulley section is A and the rotation is CW. For this listing, part number BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. These details should still be checked against the original unit before ordering.

Does the listing show vehicle-specific fitment?

Fitment is not verified here, so the safest check is to match the BXH1240N part number and the listed mounting and electrical specifications to the original alternator. For this listing, part number BXH1240N is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include NISSAN PATROL, NISSAN PATROL 1999, NISSAN PATROL 2000. These details should still be checked against the original unit before ordering.