Mahle Alternator 12V 120A MG274

The MAHLE MG274 alternator is a new 12V unit rated at 120A, supplied as a single-leg alternator with an internal regulator and a V-ribbed belt pulley. It is listed as dust-proof and uses a multifunction regulator, which are useful details when matching the unit to the charging system layout in the vehicle.

Key physical checks on this alternator include a 51mm mount leg thickness, 173mm mount centre to centre, 86.0 mounting points diameter, a 10mm pivot hole diameter, and an M8x1.25 adjusting hole diameter. The pulley outside diameter is 55mm, with 8 grooves and clockwise rotation.

This MAHLE alternator carries part number MG274 and pin code IR74, with a charge current of 120A and a 12V system voltage. It is supplied each, and the listed one-year warranty provides a straightforward reference point when comparing replacement options for compatible CASE and New Holland applications.

The alternator is described as meeting international electromagnetic compatibility requirements and being manufactured using environmentally friendly technologies and materials. Those are useful quality markers, but the practical buying decision still comes back to confirming the mounting pattern, pulley style, rotation, and part number against the vehicle application.

Key Features

• New MAHLE alternator, 12V 120A
• Part number MG274
• Internal regulator with multifunction regulator
• Single-leg alternator mount
• 8-groove V-ribbed belt pulley
• Clockwise rotation

Specifications

• Voltage: 12V
• Alternator charge current: 120A
• Power rating: 120A
• Part No.: MG274
• Pin code: IR74
• Regulator type: Internal
• Alternator type: Multi-function
• Mount leg thickness: 51mm

Known application guidance

• CASE 321
• CASE 327B
• CASE 570NXT
• CASE 580 SUPER N
• CASE 580M III
• CASE 580SM II
• CASE 580SM III
• CASE 580ST

Application and Buying Notes

Before ordering, compare the vehicle’s original alternator part number, mounting arrangement, and pulley setup with MG274. The important physical points here are the single-leg mount, 51mm mount leg thickness, 173mm mount centre to centre, 86.0 mounting points diameter, and 55mm pulley outside diameter, because a correct electrical rating alone does not confirm mechanical fit.

The listed 12V, 120A output suits a charging system designed for that level of current draw. If the machine requires a different amperage, regulator arrangement, pulley groove count, or rotation, the alternator may not be suitable even if the connector or housing looks similar.

The pulley is 8-groove and the unit rotates clockwise. Those details matter when matching belt drive alignment and pulley compatibility, particularly on equipment where the belt profile and alternator position are tightly packaged.

This unit is described as new and supplied with an internal regulator. When replacing a unit, it is sensible to confirm whether the existing alternator uses an internal regulator and whether the pin code IR74 aligns with the application being serviced.

The fitment references include a range of CASE and New Holland machines, but model lists should always be checked carefully against the exact build and any prior changes to the charging system. Matching by part number and the measured mounting data is the safest approach.

The one-year warranty provides a clear purchase reference, but warranty coverage does not replace fitment checking. If the old alternator is still available, comparing the housing shape, mount points, pulley section, and rotation side by side will reduce the chance of ordering the wrong unit.

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 MG274 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 51mm, Pivot Hole Diameter 10, Pulley Outside Diameter 55mm, Regulator Type Internal, Suits Unit Make Mahle, Note Dust-proof. Multifunction regulator., Mount Cnt to Cnt 173mm.

Additional published details for cross-checking include Alternator Charge Current [A] 120, Alternator Type Multi-function, Mounting points diameter 86.0, Distance from pulley to the alternator 24.1, Packaging width 18.60, Net Weight 5698, Product Group 2 ALTERNATORS, Part No. MG274, Brand MAHLE.

Mahle Alternator 12V 120A. Part number MG274 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 Single Leg. Regulator type is Internal. Pulley configuration is 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG274, 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 checking part number MG274, pin code IR74, 12V 120A rating, 8-groove pulley, clockwise rotation, and the listed mounting measurements against the original unit and vehicle application before purchase.

FAQ

What is the part number for this alternator?

The listed part number is MG274, and the pin code is IR74.

What voltage and output does it have?

It is a 12V alternator with a 120A charge current and 120A power rating.

What type of regulator does it use?

It has an internal regulator and is described as a multifunction alternator.

What pulley details should be checked?

The pulley is a V-ribbed type with 8 grooves and a 55mm outside diameter. Rotation is clockwise.

Is fitment listed for any vehicles?

Yes, fitment references include CASE and New Holland applications such as CASE 321, CASE 327B, CASE 570NXT, CASE 580 SUPER N, and NEW HOLLAND B110, B110B, B115, and B90, among others listed in the application data.

What should I verify before ordering?

Confirm MG274 against the original unit, then check the 12V system, 120A rating, single-leg mount, 51mm mount leg thickness, 173mm mount centre to centre, 86.0 mounting points diameter, and 8-groove pulley arrangement.