Mahle Alternator 12V 150A MG3, New, Internal Regulator

The MAHLE MG3 alternator is a new 12V unit rated at 150A, supplied as a single-leg alternator with a clockwise rotation. It is listed as a short shaft version and comes without a belt pulley, so pulley arrangement needs to be confirmed against the vehicle before fitting.

This alternator uses an internal regulator and a W connector/clamp, with two mounting bores, 10mm adjusting and pivot holes, and a 56mm mount leg thickness. The mounting points diameter is 90.0mm and the mount centre-to-centre measurement is 155mm, which are the key dimensions to compare during replacement checks.

For buyers matching rotating electrical components, the part number is MG3 and the product is supplied new, not remanufactured. MAHLE lists a one year warranty, and the unit is identified as a Mahle alternator 12V 150A for applications where those electrical and mounting details are the deciding factors.

Key Features

• New alternator, not remanufactured
• 12V system with 150A charge current
• Clockwise rotation
• Internal regulator
• Single-leg alternator mount
• Supplied without belt pulley

Specifications

• Brand: MAHLE
• Product type: Alternator
• Voltage: 12V
• Power rating: 150A
• Charge current: 150A
• Rotation: CW
• Regulator type: Internal
• Alternator mount: Single leg

Fitment guidance

• Verified fitment groups include BOBCAT, BOMAG, CLAAS, DYNAPAC, FENDT, GLEANER, HAMM, JOHN DEERE, LANDINI, MASSEY FERGUSON, and NEW HOLLAND.
• Sample applications listed include BOBCAT 444, BOMAG BW161ADH-4, BOMAG BW179, CLAAS ARION, CLAAS JAGUAR, DYNAPAC CA252/D, FENDT FARMER, GLEANER R75, HAMM 3410/P, JOHN DEERE 6615, LANDINI POWERMASTER, MASSEY FERGUSON 6485, and NEW HOLLAND TG.
• Year references are shown against some applications, including BOBCAT 444 2010 and 2011, BOMAG BW161ADH-4 2011, BOMAG BW179 2008 and 2009, CLAAS ARION 2012, CLAAS JAGUAR 2016, DYNAPAC CA252/D 2007, FENDT FARMER 2003 to 2006, GLEANER R75 2011, and HAMM 3410/P 2004 to 2013.
• Additional grouped applications are listed for JOHN DEERE SERIES 5, JOHN DEERE SERIES 6, JOHN DEERE SERIES 6020, JOHN DEERE SERIES 7030, FENDT FAVORIT, FENDT VARIO, HAMM 3411/P, HAMM 3412 SERIES, HAMM 3414 SERIES, and HAMM DV90TV.
• Fitment should still be confirmed against the alternator mounting style, pulley arrangement, rotation, connector type, and dimensions before ordering.

Application and Buying Notes

Confirm the part number MG3 first, then check the mounting measurements: single-leg mount, two mounting bores, 56mm mount leg thickness, 155mm mount centre-to-centre, and 90.0mm mounting points diameter. Those dimensions are just as important as the 12V and 150A electrical rating when replacing an alternator.

Because this unit is supplied without a belt pulley and is marked as a short shaft version, the existing pulley setup on the vehicle needs to be compared carefully. The clockwise rotation, internal regulator, and W connector/clamp also need to match the original unit or the installation may not be suitable.

The listed fitment covers a wide range of agricultural and industrial applications, but the safest approach is to verify the exact machine model, year where shown, and the physical alternator details. Matching only on brand or engine family is not enough when the alternator mount and pulley arrangement differ.

If you are replacing a failed alternator, compare the old unit before removing it completely where possible. Measure the mounting holes, confirm the connector style, and check whether your current alternator uses a pulley that must be transferred or sourced separately.

The one year warranty applies to the supplied MAHLE unit, but warranty coverage does not replace the need to confirm fitment. A correct match depends on the application details, electrical configuration, and mounting dimensions aligning with the vehicle or machine.

For fleet, workshop, and farm use, having the MG3 part number recorded makes ordering and cross-checking easier. Keep the machine model, year, and any photos of the original alternator nearby when verifying the 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 MG3 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) 150, Rotation CW, Voltage 12, Alternator Mount Single Leg, New / Reman. New, Pulleys without belt pulley.

Additional published details for cross-checking include Number of mounting bores 2, Mounting points diameter 90.0, Packaging width 18.60, Net Weight 7202, Product Group 1 ROTATING ELECTRICAL, Part No. MG3, Brand MAHLE, Description Mahle Alternator 12V 150A, Adjusting Hole Diameter 10, Pivot Hole Diameter 10.

Mahle Alternator 12V 150A. Part number MG3 should be checked first. Listed voltage is 12. Listed output rating is 150. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Compatibility note: Please confirm fitment using part number MG3, the 12V 150A specification, clockwise rotation, internal regulator, single-leg mount, and the listed mounting dimensions before purchase. If the existing unit differs on pulley, shaft length, connector, or bore spacing, it may not be a direct match.

FAQ

Is this alternator new or remanufactured?

This MAHLE alternator is listed as new, not remanufactured.

What voltage and output does it have?

It is a 12V alternator with a 150A power rating and 150A charge current.

Does it include a belt pulley?

No. It is supplied without a belt pulley.

What regulator type does it use?

It uses an internal regulator.

What mounting style and key dimensions should I check?

It has a single-leg alternator mount, two mounting bores, 56mm mount leg thickness, 56.0mm mounting bores distance, 155mm mount centre-to-centre, and 90.0mm mounting points diameter.

What vehicles or machines is it linked to?

Listed fitment groups include BOBCAT, BOMAG, CLAAS, DYNAPAC, FENDT, GLEANER, HAMM, JOHN DEERE, LANDINI, MASSEY FERGUSON, and NEW HOLLAND, with sample applications such as BOBCAT 444, BOMAG BW161ADH-4, CLAAS ARION, DYNAPAC CA252/D, FENDT FARMER, GLEANER R75, HAMM 3410/P, JOHN DEERE 6615, LANDINI POWERMASTER, MASSEY FERGUSON 6485, and NEW HOLLAND TG.