Valeo Alternator 12V 180A 439739

The Valeo Alternator 12V 180A, part number 439739, is a new direct-fastening alternator for rotating electrical applications. It is listed with a 12V system voltage, 180A charge current, internal regulator, fixed pulley, and CW rotation, so those details should be checked carefully against the vehicle specification before ordering.

This unit is built with a pad mount, 70mm mount leg thickness, 55mm mount centre-to-centre, and an 8/9 pivot hole diameter. It also uses a 6 groove pulley with a 50mm outside diameter and comes in at 7.685kg, which gives a practical set of identification points when comparing against the original alternator.

Valeo is noted here as a leading OE manufacturer and supplier for many euro vehicles. The alternator is supplied as a new unit, sold each, and carries a one year warranty. Those points matter when you are matching the part to an existing charging system or confirming a replacement before removal from the vehicle.

Key Features

• Valeo alternator, part number 439739
• 12V, 180A charge current
• New unit, sold each
• Internal regulator
• Fixed pulley, 6 groove
• CW rotation

Specifications

• Brand: Valeo
• Product type: Alternator
• Part No.: 439739
• Voltage: 12V
• Power rating / charge current: 180A
• Regulator type: Internal
• Pulley type: Fixed
• Pulley section: 6 groove

Fitment guidance

• Listed fitment references Mercedes-Benz applications.
• Fitment preview includes Mercedes-Benz C-Class, with sample applications shown for 2007 through 2016.
• Other listed Mercedes-Benz groups include CLS, E-Class, M-Class, S-Class, SL, and SLK.
• Use the vehicle’s existing alternator details and part number 439739 as the primary match points.
• Confirm mount style, pulley details, rotation, and electrical specification before purchase.

Application and Buying Notes

For a charging system part like this Valeo alternator, the critical checks are part number 439739, 12V system voltage, 180A charge current, internal regulator, and CW rotation. Those details need to line up with the vehicle’s original unit, because alternators that look similar can still differ in mounting, pulley arrangement, or connector setup.

The mounting dimensions are also important on this part. The alternator is listed with a pad mount, direct fastening, 70mm mount leg thickness, 55mm mount centre-to-centre, and an 8/9 pivot hole diameter. If any of those points do not match the removed unit, the alternator may not install correctly even if the vehicle family appears close.

Pulley details matter as well. This unit uses a fixed pulley with a 6 groove belt section and a 50mm outside diameter. That should be compared with the existing belt drive setup, since pulley mismatch can affect installation and belt alignment. The note for the connector is also specific: no connector for revolution counter.

Because the fitment list only gives a broad vehicle grouping, the safest approach is to match the replacement by part number and by the physical alternator details already fitted to the car. If the original unit is still available, compare the mounting ears, pivot hole, pulley profile, and connector arrangement before finalising the order.

This alternator is a new Valeo unit and is supplied with a one year warranty. Weight is listed at 7.685kg, which can be a useful cross-check when comparing to the original part, but it should not be used on its own to confirm compatibility. The best result comes from checking the part number, vehicle application, and the alternator’s measured features together.

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 439739 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 70mm, Pivot Hole Diameter 8/9, Pulley Outside Diameter 50mm, Regulator Type Internal, Suits Unit Make Valeo, Alternator Mount Pad, New / Reman. New.

Additional published details for cross-checking include Fastening Type Direct fastening, Weight 7.685kg, Product Group 1 ROTATING ELECTRICAL, Part No. 439739, Brand VALEO, Description Valeo Alternator 12V 180A, Pulley Type Fixed, Pin Code IR229, Power Rating (Amp) 180, Pulley Section 6 Groove.

Valeo Alternator 12V 180A. Part number 439739 should be checked first. Listed voltage is 12. Listed output rating is 180. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. 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 439739, 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 180 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment by checking part number 439739 against the vehicle application, and verify the mounting, pulley, rotation, voltage, and connector details before purchasing.

FAQ

What is the part number for this Valeo alternator?

The part number listed is 439739.

What voltage and output rating does this alternator have?

It is listed as 12V with a 180A charge current / power rating.

Is this a new or remanufactured alternator?

It is listed as a new unit.

What pulley setup does it use?

It uses a fixed pulley with a 6 groove section and a 50mm outside diameter.

What mounting details should be checked before buying?

Check the pad mount, direct fastening style, 70mm mount leg thickness, 55mm mount centre-to-centre, and 8/9 pivot hole diameter.

What vehicles are shown in the fitment information?

The fitment information references Mercedes-Benz applications, including C-Class, CLS, E-Class, M-Class, S-Class, SL, and SLK, with sample C-Class applications shown for 2007 through 2016.