Mahle Alternator 12V 33A MG124

This MAHLE alternator is a 12V, 33A unit with part number MG124 and a single-leg mount. It is listed as new, supplied with an internal regulator and a belt pulley, and it is noted as dust proof.

Key physical details include a 56mm mount leg thickness, 144mm mount centre-to-centre, 86.0 mounting points diameter, 72mm pulley outside diameter, and 21.5 distance from pulley to the alternator. The connector / clamp is W, and the pulley section is A with one belt.

This alternator is used in a range of agricultural and industrial applications, including listed fitment references for Allis Chalmers, Bomag, Case, Deutz, Deutz-Fahr, Fendt, International Harvester, Liebherr, MWM, and VM Motori. Because those applications vary, the part number and physical mounting measurements matter just as much as the voltage and amp rating when matching a replacement.

Key Features

• 12V alternator with 33A charge current
• MAHLE brand, part number MG124
• New unit with internal regulator
• Single-leg alternator mount
• Supplied with belt pulley
• Dust proof note

Specifications

• Voltage: 12V
• Alternator charge current: 33A
• Part number: MG124
• Brand: MAHLE
• New / remanufactured: New
• Warranty: One Year
• Alternator mount: Single Leg
• Pulley section: A

Fitment references supplied

• Allis Chalmers: 545, 605
• Bomag: BW100A, BW100A 2000 to 2010, BW120AD
• Case: 431, 500 Series, 531, 644, 644 A, 844A, 844S, 844S/SA
• Case IH: 3230
• Deutz: BF6L912
• Deutz-Fahr: D06, D07, DX, Intrac, M 1080 1989, M 1202 1988
• Fendt: Farmer, Farmer 1983 to 1993
• International Harvester: 1430D, 321, 431, 564, 585, 624, 784, 844, 885, Hydro 84

Application and Buying Notes

When replacing an alternator, the safest match is the part number first. MG124 is the key identifier here, but the installation still needs to line up with the 12V system, 33A charge current, single-leg mount, and the listed mounting measurements, including the 56mm mount leg thickness and 144mm mount centre-to-centre.

The pulley details are also important. This unit is supplied with a belt pulley, has a 72mm pulley outside diameter, uses pulley section A, and is set up for one belt. If the replacement unit has a different pulley layout, belt alignment and drive compatibility need to be checked before fitting.

The electrical connection should also be compared carefully. This alternator uses connector / clamp W and has an internal regulator. Those details can affect plug style and wiring compatibility, especially where the vehicle originally used a different regulator arrangement or connector style.

Fitment references cover a broad range of older agricultural and industrial equipment, but that does not replace a direct check against the vehicle or machine already on hand. Model names and year ranges can overlap across different specifications, so confirm the part number, mounting points diameter of 86.0, and the distance from pulley to alternator at 21.5 before ordering.

If you are comparing against an existing alternator, check the physical mounting pattern, the adjusting hole diameter of 8, the pivot hole diameter of 8, and the overall pulley position. Those measurements are the quickest way to avoid surprises at installation time, particularly on machines where previous repairs may have introduced a non-standard replacement.

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 MG124 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) 33, Pulley Section A, Suits Unit Make Mahle, Note Dust proof, Mount Cnt to Cnt 144mm, Alternator Charge Current [A] 33.

Additional published details for cross-checking include Connector / Clamp W, Mounting points diameter 86.0, Distance from pulley to the alternator 21.5, Packaging width 17.60, Net Weight 3640, Product Group 1 ROTATING ELECTRICAL, Part No. MG124, Brand MAHLE, Description Mahle Alternator 12V 33A, Adjusting Hole Diameter 8.

Mahle Alternator 12V 33A. Part number MG124 should be checked first. Listed voltage is 12. Listed output rating is 33. 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 MG124, 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 33 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ALLIS CHALMERS 545, ALLIS CHALMERS 605, BOMAG BW100A, BOMAG BW100A 2000, BOMAG BW100A 2001, BOMAG BW100A 2002. 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.

Compatibility note: Confirm fitment using part number MG124, the 12V 33A specification, and the listed mounting and pulley measurements before purchase. Where vehicle application details differ, measure the existing unit and compare the mount, pulley, and connector arrangements closely.

FAQ

Is this alternator new or remanufactured?

It is listed as new, not remanufactured.

What voltage and charge current does it have?

It is a 12V alternator with a 33A charge current rating.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What is the part number?

The part number is MG124.

What mounting arrangement does it use?

It is listed as a single-leg alternator mount with mount leg thickness of 56mm and mount centre-to-centre of 144mm.

What should I check before ordering?

Confirm the part number MG124, 12V system voltage, 33A output, connector / clamp W, and the mounting and pulley measurements, including the 72mm pulley outside diameter and 21.5 distance from pulley to alternator.