Valeo 439338 Alternator

Valeo 439338 Alternator for OE Fitment

Valeo 439338 is a 12-volt alternator built for charging-system replacement on select Audi and Volkswagen applications. It uses an internal fan, internal regulator, clockwise rotation, and a serpentine pulley with 5 grooves for OE-style fitment and operation.

Key Features

• 12-volt alternator with 90 amp output
• Internal fan and internal voltage regulator
• Clockwise rotation direction
• Serpentine pulley with 5 grooves
• Aluminium housing for OE-style construction
• Valeo OE family alternator, technical number SG9B010

Product Details

Valeo has supplied original equipment electrical components since 1923, and this alternator reflects that OE-focused engineering approach. Part number 439338 is built for vehicles that use the SG9B010 technical specification and is listed for 1999-2005 Audi A4, Audi A4 Quattro, Audi S4, Audi Allroad Quattro, and Volkswagen Passat applications. This part cross-references Bosch AL0800X for the same application.

Compatible With 1999 Audi A4, 1999 Audi A4 Quattro, 1999 Volkswagen Passat, 2000-2001 Audi A4, 2000-2001 Audi A4 Quattro, 2000-2001 Audi S4, 2000-2003 Volkswagen Passat, 2001-2004 Audi Allroad Quattro, 2004 Volkswagen Passat, and 2005 Volkswagen Passat. Use the vehicle notes and technical number to confirm the correct charging-system match before ordering.

Common Issues This Part Can Address

• Low battery charging output
• Battery warning light or charging-system warning
• Dim lights caused by alternator output loss
• Voltage drop during electrical load
• Alternator failure on OE-spec Audi and Volkswagen applications

Installation Notes and Tips

Verify the part number, technical number SG9B010, pulley groove count, rotation direction, and amperage rating before installation. Confirm vehicle-specific notes such as VIN breakpoints for 1999 Audi A4, Audi A4 Quattro, and 1999 Volkswagen Passat applications. Inspect the belt, battery condition, and charging connections during replacement to help avoid repeat failures.

Quality Assurance

Valeo premium alternators are supplied as 100% new units, which helps reduce the risk associated with reused internal components. The Valeo OE alternator line is engineered for original-equipment-style charging performance on the listed Audi and Volkswagen vehicles.