Mahle Alternator 12V 90A MG315

The MAHLE Alternator MG315 is a new 12V, 90A alternator supplied as an each unit for rotating electrical applications. It is an alternator only, with no belt pulley fitted, and it uses an internal regulator for charging control.

Key physical details matter when matching an alternator, and this unit is specified with a single-leg mount, a 50.8mm mount leg thickness, a 10.2mm pivot hole diameter, and 171mm mount centre-to-centre. The shaft diameter is 17mm, and the mounting points diameter is 86.0.

This MAHLE unit is listed with clockwise rotation and a connecting angle of 10.0 degrees. It is identified as part number MG315, with pin code IR189, and is covered by a one-year warranty.

For buyers replacing a charging component, the main checks are voltage, output, mounting style, shaft size, and whether a pulley is required. This alternator is rated at 12 volts and 90 amps, and it is supplied new rather than remanufactured.

Key Features

• MAHLE alternator, part number MG315
• 12V electrical system
• 90A charge current / power rating
• New unit, not remanufactured
• Internal regulator
• Single-leg alternator mount

Specifications

• Brand: MAHLE
• Product type: Alternator
• Voltage: 12V
• Power rating: 90A
• Alternator charge current: 90A
• Regulator type: Internal
• Rotation: CW
• Alternator mount: Single Leg

Application and Buying Notes

Before ordering, check the part number MG315 against the failed unit or vehicle application details, because the mounting pattern is specific: single-leg mount, 50.8mm mount leg thickness, 10.2mm pivot hole diameter, and 171mm mount centre-to-centre. Those dimensions need to align with the existing setup for the alternator to install correctly.

This alternator is a 12V, 90A unit with an internal regulator, so it suits systems expecting that charging specification. If your original alternator uses a different voltage, output rating, regulator arrangement, or pulley setup, it should not be assumed to be a direct match without checking the application details carefully.

The pulley arrangement is another important point because this unit is supplied without a belt pulley. Confirm whether your vehicle needs a pulley transferred from the old alternator or whether a pulley is required separately for your application. The shaft diameter is 17mm, so pulley compatibility should be checked against that measurement as well.

Rotation and mounting orientation also need attention. This alternator is listed as clockwise rotation with a connecting angle of 10.0 degrees, and the mounting points diameter is 86.0. These details are useful when comparing the replacement unit against the original part to avoid ordering the wrong configuration.

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 MG315 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 50.8mm, Pivot Hole Diameter 10.2, Pulley Section Not Applicable, Rotation CW, Suits Unit Make Mahle, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Pulleys without belt pulley, Connecting Angle [Degree] 10.0, Packaging length 24.8, Packaging height 17.50, Weight 5.28kg, Product Group 1 ROTATING ELECTRICAL, Part No. MG315, Brand MAHLE, Description Mahle Alternator 12V 90A, Adjusting Hole Diameter 8.

Mahle Alternator 12V 90A. Part number MG315 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 Not Applicable. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG315, 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.

Compatibility note: Confirm fitment using part number MG315, the 12V 90A rating, the single-leg mount, the 17mm shaft diameter, and the pulley-free supply condition before purchasing.

FAQ

What is the part number for this MAHLE alternator?

The part number is MG315. The pin code listed is IR189. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new, not remanufactured. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.

Does this alternator include a belt pulley?

No. It is supplied without a belt pulley. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.

What are the electrical specifications?

It is a 12V alternator with a 90A power rating and 90A charge current. It also uses an internal regulator. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.

What mounting details are provided?

The alternator has a single-leg mount, 50.8mm mount leg thickness, a 10.2mm pivot hole diameter, 171mm mount centre-to-centre, 50.8 mounting bores distance, and 86.0 mounting points diameter. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Check the part number MG315, the 12V 90A specification, the single-leg mount, the 17mm shaft diameter, clockwise rotation, and the fact that it is supplied without a belt pulley. For this listing, part number MG315 is the main reference point. Listed voltage is 12. Listed output rating is 90. These details should still be checked against the original unit before ordering.