Bosch Alternator 12V 90A BXM1236A

This Bosch alternator is a 12V, 90A unit with part number BXM1236A, supplied as a new rotating electrical component for the vehicle charging system. It uses an internal regulator, a 5 groove pulley, and a twin leg alternator mount, so the physical mounting and drive layout need to match the vehicle application before purchase.

The listed dimensions include 54mm inside mounting legs, an 8mm pivot hole diameter, an M8 x 1.25 adjusting hole diameter, and 165mm mount centre to centre. The pulley outside diameter is 64mm, and the unit weighs 7.04kg, which gives a useful reference when comparing against an existing alternator.

The supplied application detail identifies Mitsubishi vehicles with the 6G72 engine. Fitment data also points to Mitsubishi Magna, Pajero, and Verada applications across multiple model years, but the correct choice should still be confirmed against the part number, mounting layout, pulley configuration, and electrical specification before ordering.

Key Features

• 12V alternator with 90A output
• Bosch brand, new unit
• Internal regulator
• 5 groove pulley
• Twin leg alternator mount
• Part number BXM1236A

Specifications

• Voltage: 12V
• Power rating: 90A
• Type: Alternator
• Regulator type: Internal
• Pulley outside diameter: 64mm
• Pulley section: 5 groove
• Alternator mount: Twin leg
• Inside mounting legs: 54mm

Confirmed application guidance

• Mitsubishi with 6G72 engine
• Mitsubishi Magna
• Mitsubishi Pajero
• Mitsubishi Verada
• Fitment data includes Magna model years 1991, 1992, 1993, 1994, 1995 and 1996
• Fitment data includes Pajero model years 1995, 1996, 1997 and 1998

Application and Buying Notes

Before ordering, compare the part number BXM1236A with the unit being replaced and check the mounting layout carefully. This alternator uses a twin leg mount, 54mm inside mounting legs, an 8mm pivot hole, and an M8 x 1.25 adjusting hole, so even small differences in brackets or bracket spacing can prevent a proper installation.

The charging output is 90A at 12V, which is the key electrical specification to match. The internal regulator and 5 groove pulley also matter, because the vehicle’s charging system and belt drive must suit the alternator design rather than just the general engine family.

The supplied application note points to Mitsubishi vehicles with the 6G72 engine, along with listed Magna, Pajero, and Verada applications. That is useful guidance, but it is still best to confirm the exact vehicle details against the existing alternator, the pulley groove count, and the mount centre to centre measurement of 165mm before finalising the order.

If you are replacing a worn alternator, compare the old unit’s connector style, bracket positions, and pulley alignment as well as the Bosch part number. A replacement can share broad engine coverage and still differ in mounting or drive configuration, so the physical checks are just as important as the vehicle description.

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 BXM1236A 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 54mm, Pivot Hole Diameter 8, Pulley Outside Diameter 64mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 165mm, Weight 7.04kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. BXM1236A, Brand BOSCH, Description Bosch Alternator 12V 90A, Adjusting Hole Diameter M8 x 1.25, Pin Code IR49, Power Rating (Amp) 90, Pulley Section 5 Groove, Suits Unit Make Bosch, Alternator Mount Twin Leg.

Bosch Alternator 12V 90A. Part number BXM1236A should be checked first. Listed voltage is 12. Listed output rating is 90. 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 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXM1236A, 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 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MITSUBISHI MAGNA, MITSUBISHI MAGNA 1991, MITSUBISHI MAGNA 1992, MITSUBISHI MAGNA 1993. 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.

The listed warranty is One Year. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm fitment using part number BXM1236A, the 12V 90A specification, the twin leg mounting pattern, and the listed Mitsubishi application details before purchase. Do not rely on engine family alone; match the mounting measurements, pulley section, and existing unit configuration to avoid ordering the wrong alternator.

FAQ

What is the part number for this alternator?

The part number listed is BXM1236A.

What voltage and output does it have?

It is a 12V alternator with a 90A power rating.

Does it use an internal regulator?

Yes. The regulator type is listed as internal.

What belt type does it suit?

It has a 5 groove pulley section, so the belt arrangement must match that configuration.

What vehicle applications are noted?

The supplied application detail notes Mitsubishi vehicles with the 6G72 engine, and fitment data also references Mitsubishi Magna, Pajero, and Verada applications.

What should I check before ordering?

Check the part number, 12V 90A rating, twin leg mounting, 54mm inside mounting legs, 8mm pivot hole, M8 x 1.25 adjusting hole, 165mm mount centre to centre, and 5 groove pulley against the existing unit.