Mahle Alternator 12V 55A MG125

The MAHLE Alternator MG125 is a new 12V, 55A rotating electrical unit supplied as each. It is listed with an internal regulator, clockwise rotation, and a single leg alternator mount, so it is important to compare the mounting style and electrical connections before ordering.

Key identifiers on this unit include part no. MG125, OEM number 11201097, and pin code IR165. The connector/clamp is listed as W, the pulley is supplied without a belt pulley, and the pulley section is marked not applicable.

This alternator is described as a MAHLE unit with a 12V charging system and 55 amp output. It carries a one year warranty and is packaged with dimensions of 24.8 length and 18.60 width, with a net weight of 5016.

Fitment information supplied for this item references Mercedes-Benz applications, including Mercedes-Benz LP, Mercedes-Benz MB-Trac, Mercedes-Benz NG, and Mercedes-Benz Unimog families. A model and year should still be checked against the part number and the mounting details on the vehicle already fitted.

Key Features

• 12V alternator with 55A output
• New unit, supplied each
• Internal regulator
• Single leg alternator mount
• Clockwise rotation
• Supplied without belt pulley

Specifications

• Brand: MAHLE
• Product type: Alternator
• Part No.: MG125
• OEM number: 11201097
• Voltage: 12
• Power rating / alternator charge current: 55A
• Regulator type: Internal
• Rotation: CW

Fitment guidance

• Mercedes-Benz LP applications are listed in the supplied fitment data.
• Mercedes-Benz MB-Trac applications are listed in the supplied fitment data.
• Mercedes-Benz NG applications are listed in the supplied fitment data.
• Mercedes-Benz Unimog applications are listed in the supplied fitment data.
• A 1963 through 1973 Mercedes-Benz LP range appears in the fitment preview.
• Confirm the vehicle’s existing alternator uses the same part number, mounting arrangement, rotation, connector type, and pulley arrangement before ordering.

Application and Buying Notes

The most reliable way to check this alternator is by comparing MG125 and OEM number 11201097 with the unit currently fitted to the vehicle. That comparison matters here because the alternator is a 12V, 55A unit with an internal regulator, and those details need to match the vehicle’s charging setup.

The mounting measurements are also worth checking closely. This alternator is listed with a 10.2 mount hole diameter, 80.0 mounting bores distance, 86.0 mounting points diameter, 12 adjusting hole diameter, and 10 pivot hole diameter, all of which affect whether it will physically align on the bracket and adjuster.

The pulley arrangement should be confirmed before purchase because this unit is supplied without a belt pulley and the pulley section is marked not applicable. If the vehicle needs a specific pulley setup, that requirement should be matched separately rather than assumed.

Connector and rotation details are just as important as the mounting points. This alternator is listed with connector/clamp W, pin code IR165, and clockwise rotation, so the wiring connection and drive direction should be checked against the original unit.

The listed Mercedes-Benz fitment families provide a guide only and should be checked against the exact application. If the vehicle is a Mercedes-Benz LP, MB-Trac, NG, or Unimog variant, the safest approach is to verify by part number, mounting pattern, and the removed alternator’s physical configuration.

For workshop or fleet purchasing, the one year warranty applies to this MAHLE alternator as supplied. Keep the original part details handy when ordering, especially if the vehicle has been repaired before or if the charging system has been modified from standard.

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 MG125 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 Hole Diameter 10.2, Pin Code IR165, Power Rating (Amp) 55, Regulator Type Internal, Suits Unit Make Mahle, Alternator Mount Single Leg, OEM Number 11201097.

Additional published details for cross-checking include Pulleys without belt pulley, Mounting Bores Distance 80.0, Mounting points diameter 86.0, Packaging width 18.60, Net Weight 5016, Product Group 1 ROTATING ELECTRICAL, Part No. MG125, Brand MAHLE, Description Mahle Alternator 12V 55A, Adjusting Hole Diameter 12.

Mahle Alternator 12V 55A. Part number MG125 should be checked first. Listed voltage is 12. Listed output rating is 55. 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 Not Applicable. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG125, 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 matching part number MG125, OEM number 11201097, the 12V 55A specification, mounting measurements, connector type W, pulley arrangement, and the vehicle’s existing application details before purchase.

FAQ

What is the part number for this alternator?

The listed part number is MG125. The OEM number supplied is 11201097.

Is this alternator 12 volt?

Yes. It is listed as a 12V alternator.

What is the output rating?

The alternator is rated at 55A, and the alternator charge current is also listed as 55A.

Does this alternator come with a pulley?

No. It is supplied without a belt pulley, and the pulley section is marked not applicable.

What type of regulator does it use?

It uses an internal regulator.

Which vehicles is it listed against?

The supplied fitment information references Mercedes-Benz LP, Mercedes-Benz MB-Trac, Mercedes-Benz NG, and Mercedes-Benz Unimog applications. Exact fitment should still be confirmed by part number and the vehicle’s mounting details.