Valeo Alternator 12V 220A 439770

The Valeo Alternator 12V 220A, part number 439770, is a new OE product supplied as an each unit for rotating electrical applications. It is rated at 220 amps and 12 volts, with a clockwise rotation and a 7 groove pulley.

This alternator uses a pad mount with direct fastening, a 70mm mount leg thickness, and a 56mm mount centre-to-centre measurement. The pulley outside diameter is 50mm, and the unit weighs 7.654kg.

The connector is listed as no connector for revolution counter. As an OE product from Valeo, it suits buyers who need to match the listed electrical and mounting details rather than relying on appearance alone.

Key Features

• OE product
• New unit
• 12V system
• 220A charge current
• 7 groove pulley
• Pad mount

Specifications

• Brand: Valeo
• Part No.: 439770
• Type: Alternator
• Voltage: 12V
• Power Rating: 220A
• Alternator Charge Current: 220A
• Pulley Section: 7 groove
• Pulley Outside Diameter: 50mm

Fitment guidance

• Fitment is not fully verified here and should be confirmed against the vehicle application data and part number 439770.
• The fitment data supplied references Mercedes-Benz applications, including CLS, E-Class, GL-Class and M-Class variants.
• If your vehicle is listed against this part, confirm the alternator mounting style, pulley section, rotation and electrical rating before ordering.

Application and Buying Notes

When checking this alternator, start with the key identifiers: Valeo, part number 439770, 12V, and 220A. These are the main matching points for the electrical system, and they should line up with the vehicle's original alternator specification before you go any further.

Mounting details matter as much as the electrical rating. This unit is a pad mount with direct fastening, 70mm mount leg thickness, and 56mm centre-to-centre mount spacing. If those dimensions do not match your existing unit, the alternator may not install correctly even if the voltage and amperage appear suitable.

The pulley setup also needs attention. This alternator has a 7 groove pulley with a 50mm outside diameter and clockwise rotation. Matching the pulley section and rotation is important when replacing a charging system component, especially where belt alignment and drive direction must remain unchanged.

The unit is listed as new and carries a one year warranty. It is also described as an OE product, which is useful for buyers wanting a replacement that follows the listed factory-style specifications. Even so, the safest approach is to compare the old unit, the vehicle application, and the part number together before purchase.

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 439770 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) 220, Pulley Section 7 Groove, Suits Unit Make Valeo, Alternator Mount Pad, New / Reman. New, Fastening Type Direct fastening, Weight 7.654kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 439770, Brand VALEO, Description Valeo Alternator 12V 220A, Mount Leg Thickness 70mm, Pulley Outside Diameter 50mm, Rotation CW, Voltage 12, Mount Cnt to Cnt 56mm, Alternator Charge Current [A] 220.

Valeo Alternator 12V 220A. Part number 439770 should be checked first. Listed voltage is 12. Listed output rating is 220. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. Pulley configuration is 7 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 439770, 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 220 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment using part number 439770 and the listed application details, including 12V, 220A, pad mount, direct fastening, 7 groove pulley, 50mm pulley diameter, and clockwise rotation.

FAQ

What is the part number for this alternator?

The part number is 439770. For this listing, part number 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. These details should still be checked against the original unit before ordering.

What voltage and amperage is this alternator rated at?

It is rated at 12V and 220A. For this listing, part number 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. 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 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. These details should still be checked against the original unit before ordering.

What type of mount does this alternator use?

It uses a pad mount with direct fastening. For this listing, part number 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. These details should still be checked against the original unit before ordering.

What pulley details are listed?

The alternator has a 7 groove pulley with a 50mm outside diameter. For this listing, part number 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. These details should still be checked against the original unit before ordering.

Which vehicles are mentioned in the fitment data?

The fitment data references Mercedes-Benz applications, including CLS, E-Class, GL-Class and M-Class variants. For this listing, part number 439770 is the main reference point. Listed voltage is 12. Listed output rating is 220. Published fitment references include MERCEDES-BENZ CLS, MERCEDES-BENZ CLS 2011, MERCEDES-BENZ CLS 2012. These details should still be checked against the original unit before ordering.