Mahle Alternator 12V 33A MG123

This Mahle alternator is a new 12V unit rated at 33A, supplied as each and identified by part number MG123. It is listed with an internal regulator, a twin leg alternator mount, and a belt pulley fitted for a single belt application.

The mounting details are specific: inside mounting legs are 73mm, the mount centre to centre measurement is 160mm, the mounting bores distance is 73.0mm, and the mounting points diameter is 80.0mm. The pulley outside diameter is 82mm, with a distance from the pulley to the alternator of 49.0mm and a connecting angle of 12 degrees.

This alternator is noted as dust proof and carries a one year warranty. It is a Mahle unit with a 12V voltage rating and a 33A charge current, so it is important to compare the physical measurements and electrical requirements against the vehicle's original unit before ordering.

Key Features

• 12V alternator with 33A charge current
• New unit, supplied each
• Internal regulator
• Twin leg alternator mount
• With belt pulley for 1 belt
• Dust proof note

Specifications

• Brand: Mahle
• Product type: Alternator
• Part No.: MG123
• Voltage: 12V
• Power rating: 33A
• Alternator charge current: 33A
• Regulator type: Internal
• Mount type: Twin leg

Verified fitment

• FIAT 1000
• FIAT 128
• FIAT 400
• FIAT 500 SERIE
• FIAT 600 SERIE
• SAME
• SAME CENTAURO
• SAME DRAGO

Application and Buying Notes

Fitment is listed against a defined group of FIAT and SAME applications, but the safest check is still the original alternator reference and the mounting dimensions. The key points here are the 12V electrical system, 33A output, MG123 part number, twin leg mount, and the 73mm inside mounting legs.

Before buying, compare the pulley arrangement and belt setup. This unit is supplied with a belt pulley and uses one belt, with a 82mm pulley outside diameter. If the original unit uses a different pulley offset, belt count, or mounting geometry, the alternator may not suit the vehicle even if the make is similar.

The listed measurements also matter during installation. The 160mm mount centre to centre, 73.0mm mounting bores distance, 80.0mm mounting points diameter, 11mm adjusting hole and 10mm pivot hole are all practical checks that help confirm alignment and fit. If you are matching a replacement for a working alternator, measuring the old unit first is often the most reliable approach.

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 MG123 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, Inside Mounting Legs 73mm, Power Rating (Amp) 33, Pulley Section A, Suits Unit Make Mahle, Note Dust proof, Mount Cnt to Cnt 160mm, Alternator Charge Current [A] 33.

Additional published details for cross-checking include Mounting Bores Distance 73.0, Mounting points diameter 80.0, Distance from pulley to the alternator 49.0, Packaging width 17.60, Net Weight 3660, Product Group 1 ROTATING ELECTRICAL, Part No. MG123, Brand MAHLE, Description Mahle Alternator 12V 33A, Adjusting Hole Diameter 11.

Mahle Alternator 12V 33A. Part number MG123 should be checked first. Listed voltage is 12. Listed output rating is 33. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Pulley configuration is A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG123, 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 33 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973, FIAT 1000 1974, SAME CENTAURO, SAME CENTAURO 1978. 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: Please confirm fitment using the MG123 part number, the 12V 33A rating, and the listed mounting and pulley measurements before purchase. Vehicle application should always be checked against the original alternator and installation dimensions.

FAQ

What is the part number for this alternator?

The part number is MG123. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 33A charge current. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.

Is the regulator internal or external?

This alternator is listed with an internal regulator. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.

What mounting style does it use?

It uses a twin leg alternator mount with 73mm inside mounting legs. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.

Does it come with a pulley?

Yes. It is listed with a belt pulley and is set up for one belt. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.

Which vehicles are listed for fitment?

Listed fitment includes FIAT 1000, FIAT 128, FIAT 400, FIAT 500 SERIE, FIAT 600 SERIE, and a range of SAME applications including CENTAURO, DRAGO, JAGUAR, LEOPARD, MERCURY, RANGER, TIGER, TRIDENT, VEGNERON and VIGNERON. For this listing, part number MG123 is the main reference point. Listed voltage is 12. Listed output rating is 33. Published fitment references include FIAT 1000, FIAT 1000 1972, FIAT 1000 1973. These details should still be checked against the original unit before ordering.