Valeo 439261 Alternator

Valeo 439261 Alternator for Audi and Volkswagen

The Valeo 439261 alternator is a 12-volt charging system component built for select Audi A4, Audi A4 Quattro, Audi Allroad Quattro, and Volkswagen Passat applications. As part of the Valeo OE alternator line, it uses an internal regulator, internal fan, and a 6-groove serpentine pulley to support stable electrical output.

Key Features

• 12-volt alternator with 90 amp amperage rating
• Internal regulator for integrated voltage control
• Internal fan design for charging system cooling
• Clockwise rotation direction
• 6-groove pulley for serpentine belt systems
• Aluminium housing for OE-style fit and durability
• Valeo OE family construction for select European vehicle applications

Product Details

Valeo has supplied original equipment electrical systems since 1923, and this alternator reflects that OE-focused engineering approach. The 439261 is identified with technical number SG9B011 and is built as a 100% new unit, which helps avoid the wear concerns associated with reused internal components. It is a direct replacement choice for drivers searching for a 2000-2005 Volkswagen Passat alternator, a 2000-2001 Audi A4 alternator, or a 2002-2004 Audi Allroad Quattro charging system replacement. This part cross-references Bosch AL0725X for the same application.

What It Helps Address

• Battery warning light caused by weak charging output
• Low system voltage affecting lights, accessories, or electronics
• Charging instability from a failing internal regulator
• Noise or belt drive issues related to alternator wear
• Starting problems linked to insufficient alternator output

Installation Notes and Tips

Verify pulley groove count, rotation direction, amperage rating, and connector match before installation. Confirm vehicle-specific fitment notes, including VIN breakpoints for 1999 Audi A4, 1999 Audi A4 Quattro, and 1999 Volkswagen Passat applications. Inspect the serpentine belt, tensioner, and charging cables during replacement to help ensure proper system performance after installation.

Quality Assurance

This Valeo alternator is part of the Valeo OE line, built to original equipment specifications for the listed Audi and Volkswagen applications. Valeo’s electrical system background and OE supplier status support consistent fitment and charging-system performance for the vehicles shown below.

Compatible Vehicles

• Fits 2000-2005 Volkswagen Passat, N/A
• Fits 2002-2004 Audi Allroad Quattro, N/A
• Fits 2000-2001 Audi A4, N/A
• Fits 2000-2001 Audi A4 Quattro, N/A
• Fits 1999 Audi A4, N/A
• Fits 1999 Audi A4 Quattro, N/A
• Fits 1999 Volkswagen Passat, N/A