Mahle Alternator 12V 120A MG178

The MAHLE Alternator MG178 is a new 12V, 120A rotating electrical unit with an internal regulator and single leg mount. It is listed with a clockwise rotation, 17mm shaft diameter, 8mm pivot hole diameter, and 8mm adjusting hole diameter, so the mounting style and physical dimensions can be checked before ordering.

This alternator is described as dust proof and carries a one year warranty. It is supplied as an each unit, with a stated weight of 5.28kg and a mount centre to centre measurement of 166mm, which gives a practical reference point when comparing against the unit already fitted to the machine.

The MAHLE part number is MG178 and the pin code is IR200. The product is identified as a Mahle alternator and is part of the rotating electrical group, with the supplied application data covering selected CASE IH, FENDT and VALTRA equipment. As with any alternator replacement, the key checks are voltage, amperage, pulley arrangement, mount style and shaft dimensions.

Key Features

• 12V alternator with 120A power rating
• Internal regulator
• Clockwise rotation
• Single leg mount
• Dust proof design
• New unit, not remanufactured

Specifications

• Brand: MAHLE
• Product type: Alternator
• Voltage: 12V
• Power rating: 120A
• Part No.: MG178
• Pin Code: IR200
• Regulator type: Internal
• Rotation: CW

Verified application groups supplied

• CASE IH CVX
• FENDT FARMER
• FENDT VARIO
• VALTRA 6300#
• VALTRA 6350
• VALTRA 6400#
• VALTRA 6550HT
• VALTRA 6750

Application and Buying Notes

Before ordering, compare the MG178 against the alternator currently fitted to the machine and confirm the 12V system, 120A output, single leg mounting style and clockwise rotation. The listed 166mm mount centre to centre, 56mm mount leg thickness and 17mm shaft diameter are useful confirmation points when matching the physical unit.

The pulley section is marked not applicable, so this alternator should be checked against the existing arrangement rather than assumed from a pulley description. The internal regulator is also an important detail, because regulator type needs to match the vehicle’s charging system setup. If the unit on the machine differs in mount shape, shaft size or electrical specification, do not rely on appearance alone.

The fitment data supplied includes selected CASE IH CVX, FENDT FARMER, FENDT VARIO and several VALTRA series and model groups, but the safest purchasing check remains the part number MG178 and the application details for the specific machine. The same model family can use different alternator variants, so confirming the exact unit already installed is still the best way to avoid a mismatch.

Because this is a 12V, 120A alternator, it is intended to replace a like-for-like unit rather than to change the electrical system specification. The dust proof note may be relevant in working environments, but the mounting measurements, shaft diameter and regulator type are still the main compatibility checkpoints. If any of those details are uncertain, compare the old part carefully before completing the order.

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 MG178 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 8, Pulley Section Not Applicable, Rotation CW, Suits Unit Make Mahle, Note Dust proof, Mount Cnt to Cnt 166mm.

Additional published details for cross-checking include Shaft Dimension 17, Product Group 2 ALTERNATORS, Part No. MG178, Brand MAHLE, Description Mahle Alternator 12V 120A, Adjusting Hole Diameter 8, Pin Code IR200, Power Rating (Amp) 120, Regulator Type Internal.

Mahle Alternator 12V 120A. Part number MG178 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 Not Applicable. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG178, 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 120 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include CASE IH CVX, CASE IH CVX 2003, FENDT FARMER, FENDT FARMER 2003, FENDT VARIO, FENDT VARIO 2010. 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 MG178, pin code IR200, and the exact application details, mount style, shaft diameter, rotation and voltage on the machine before purchase.

FAQ

What is the part number for this alternator?

The supplied part number is MG178, and the pin code is IR200.

What voltage and output does it have?

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

Is it new or remanufactured?

It is listed as new.

What type of regulator does it use?

It has an internal regulator.

What mounting and shaft details are listed?

It is a single leg mount with a 56mm mount leg thickness, 166mm mount centre to centre, 8mm pivot hole diameter, 8mm adjusting hole diameter and 17mm shaft diameter.

Which equipment groups are shown in the fitment data?

The supplied fitment data includes selected CASE IH CVX, FENDT FARMER, FENDT VARIO and VALTRA model groups and series, including VALTRA 6300#, 6350, 6400#, 6550HT, 6750, 8050#, 8150, 8450, 8550, N SERIES, S SERIES and T SERIES.