Valeo Alternator 12V 140A 439552

The Valeo Alternator 12V 140A, part number 439552, is a new alternator for the rotating electrical system, supplied as each and built with a 12 volt output and 140 amp power rating. It uses a 5 groove pulley, clockwise rotation, and a pad mount with direct fastening, so it is important to check the mounting style and belt setup against the vehicle before ordering.

This unit is listed with an internal regulator, a 50mm pulley outside diameter, and a connector arrangement noted as no connector for revolution counter. Those details matter when matching the replacement to the vehicle’s charging system and loom connection, especially where the original unit has a specific plug style or sensor arrangement.

Valeo identifies this alternator as a new unit, with a weight of 7.23kg and a one year warranty. It is described as an alternator developed with high quality components to improve lifetime, reliability, comfort, and efficiency, which makes it a relevant replacement where the original charging performance needs to be maintained with the correct specification.

Key Features

• 12V alternator with 140A power rating
• New unit, supplied each
• 5 groove pulley, 50mm outside diameter
• Clockwise rotation
• Internal regulator
• Pad mount with direct fastening

Specifications

• Brand: Valeo
• Part No.: 439552
• Product type: Alternator
• Voltage: 12V
• Power Rating (Amp): 140
• Alternator Charge Current [A]: 150
• Pulley Section: 5 groove
• Pulley Outside Diameter: 50mm

Fitment

• Mercedes-Benz A-Class
• Mercedes-Benz A-Class 2004 to 2012
• Mercedes-Benz B-Class
• Mercedes-Benz B-Class 2005

Application and Buying Notes

Before buying, compare the part number 439552, the 12V electrical system, and the 140A power rating with the original alternator fitted to the vehicle. The pulley setup is also important here: this unit has a 5 groove pulley with a 50mm outside diameter and clockwise rotation, so the belt arrangement must match.

The mounting arrangement should be checked carefully. This alternator is a pad mount unit with direct fastening, and it has an internal regulator. If the original alternator uses a different mounting pattern, different regulator type, or a different connector arrangement, it may not be a direct swap.

The connector detail is specific: this unit is listed with no connector for revolution counter. That can matter on vehicles where the factory alternator uses a speed or counter signal connection. Confirm the plug, clamp, and any sensor requirements on the vehicle before purchase.

The listed fitment references Mercedes-Benz A-Class and B-Class applications, including A-Class 2004 through 2012 and B-Class 2005. Even with those application references, the safest check remains the part number, pulley section, mounting type, and electrical connection rather than relying on vehicle series alone.

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 439552 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, Power Rating (Amp) 140, Pulley Section 5 Groove, Rotation CW, Voltage 12, New / Reman. New, Fastening Type Direct fastening, Weight 7.23kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 439552, Brand VALEO, Description Valeo Alternator 12V 140A, Pin Code IR228, Pulley Outside Diameter 50mm, Regulator Type Internal, Suits Unit Make Valeo, Alternator Mount Pad, Alternator Charge Current [A] 150.

Valeo Alternator 12V 140A. Part number 439552 should be checked first. Listed voltage is 12. Listed output rating is 140. 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 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 439552, 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 140 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number 439552, 12V system requirements, 140A output, 5 groove pulley, clockwise rotation, pad mount, and the vehicle’s connector and regulator arrangement before ordering.

FAQ

What is the part number for this Valeo alternator?

The part number is 439552. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.

What electrical specification does it have?

It is a 12V alternator with a 140A power rating, and the specification list also shows Alternator Charge Current [A] as 150. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.

What pulley and rotation details are listed?

It has a 5 groove pulley, a 50mm pulley outside diameter, and clockwise rotation. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.

What type of regulator and mount does it use?

It uses an internal regulator and a pad mount with direct fastening. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.

Which vehicles are listed in the fitment information?

The fitment information references Mercedes-Benz A-Class, including 2004 to 2012 applications, and Mercedes-Benz B-Class, including 2005. For this listing, part number 439552 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include MERCEDES-BENZ A-CLASS, MERCEDES-BENZ A-CLASS 2004, MERCEDES-BENZ A-CLASS 2005. These details should still be checked against the original unit before ordering.