Mahle Alternator 12V 90A MG594

This MAHLE alternator is a 12V, 90A unit supplied new, with internal regulation and a clockwise rotation. It is listed with part number MG594 and uses a 6 groove V-ribbed belt pulley, so matching the drive setup and the electrical specification is essential before ordering.

Physical mounting details are also important on this unit. Key measurements include a 56mm mount leg thickness, 155mm mount centre to centre, 56.0mm mounting bores distance, a 10mm pivot hole diameter, and a 10mm adjusting hole diameter. The alternator is described as single leg mount with 2 mounting bores.

Other listed identifiers include connector / clamp W, pulley outside diameter 49mm, and a distance from pulley to the alternator of 35.6mm. It is noted as dust proof and supplied as a MAHLE alternator for rotating electrical applications.

This is a 12 volt alternator with a charge current and power rating of 90 amps. For replacement work, the safest approach is to confirm the unit’s part number, mounting layout, pulley type, and rotation against the removed alternator before fitting.

Key Features

• MAHLE alternator, new unit
• 12V system, 90A output
• Internal regulator
• Clockwise rotation
• 6 groove V-ribbed belt pulley
• Single leg mount with 2 mounting bores

Specifications

• Voltage: 12V
• Alternator charge current: 90A
• Power rating: 90 amp
• Regulator type: Internal
• Rotation: CW
• Pulley section: 6 groove
• Pulley outside diameter: 49mm
• Pulleys: with V-ribbed belt pulley

Known application references

• BOBCAT 444
• BOBCAT 444 2010
• BOBCAT 444 2011
• BOMAG BW161ADH-4
• BOMAG BW179
• BOMAG BW213D
• BOMAG BW214 DHC-4
• BOMAG BW25RH

Application and Buying Notes

Before ordering, compare the removed alternator against the key identifiers here: MAHLE, part number MG594, 12V, 90A, internal regulator, CW rotation, and a 6 groove pulley. Those details are the most useful first checks because a visually similar alternator can still differ in regulation, pulley arrangement, or mounting.

The mounting measurements matter just as much as the electrical rating. This unit is listed with a single leg mount, 2 mounting bores, 56mm mount leg thickness, 155mm mount centre to centre, 56.0mm mounting bores distance, and 10mm pivot and adjusting holes. If these points do not line up with the vehicle or machine bracketry, the alternator should not be treated as a direct match.

Pulley alignment also needs to be checked carefully. The pulley outside diameter is 49mm, the pulley section is 6 groove, and the alternator uses a V-ribbed belt pulley. Matching the belt type, groove count, and mounting offset helps avoid installation issues and belt tracking problems.

This alternator is described as dust proof and new, with a one year warranty. That gives a clear buying reference, but it does not replace a physical comparison. If the original unit has a different connector, clamp style, mounting leg layout, or rotation, confirm the replacement against the old alternator before committing to the purchase.

The listed application references cover equipment and vehicles including BOBCAT, BOMAG, DYNAPAC, HAMM, JOHN DEERE, and MERCEDES-BENZ groupings. Application lists are useful guidance, but the safest fit check remains the part number, mounting measurements, pulley specification, and the exact unit removed from the machine or vehicle.

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 MG594 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, Pivot Hole Diameter 10, Pulley Outside Diameter 49mm, Regulator Type Internal, Suits Unit Make Mahle, Note Dust proof, Mount Cnt to Cnt 155mm.

Additional published details for cross-checking include Alternator Charge Current [A] 90, Connector / Clamp W, Mounting Bores Distance 56.0, Distance from pulley to the alternator 35.6, Packaging width 18.60, Net Weight 5664, Product Group 1 ROTATING ELECTRICAL, Part No. MG594, Brand MAHLE, Description Mahle Alternator 12V 90A.

Mahle Alternator 12V 90A. Part number MG594 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 Single Leg. Regulator type is Internal. Pulley configuration is 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG594, 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 BOBCAT 444, BOBCAT 444 2010, BOBCAT 444 2011, BOMAG BW161ADH-4, BOMAG BW161ADH-4 2011, BOMAG BW179. 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 by matching part number MG594, the 12V 90A specification, CW rotation, 6 groove V-ribbed pulley, and the listed mounting measurements against the original alternator and application details before ordering.

FAQ

What is the part number for this alternator?

The listed part number is MG594.

Is this a 12 volt alternator?

Yes. The alternator is listed as 12V.

What is the output rating?

The alternator is rated at 90A, and the power rating is also listed as 90 amp.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley type does it use?

It uses a 6 groove V-ribbed belt pulley, with a pulley outside diameter of 49mm.

What should I check before fitting it?

Confirm the part number MG594, 12V rating, 90A output, CW rotation, mounting dimensions, connector / clamp W, and pulley details against the original alternator and application requirements.