Bosch AL0831X Alternator

Bosch AL0831X Remanufactured Alternator

The Bosch AL0831X is a remanufactured 12-volt alternator built for charging-system performance and dependable electrical output. It is a direct-fit option for select Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, and Volkswagen Passat applications that use the specified Bosch or Valeo configurations.

Key Features

• Remanufactured Bosch alternator for charging-system replacement
• 12-volt unit with 150-amp amperage rating
• Internal fan and internal regulator design
• Clockwise rotation
• 6-groove pulley with pulley included
• Aluminum case and aluminum case material
• External fan included and external regulator included
• Plug type 364 with rear-view plug clocking at 6 o’clock main mounting ear

Product Details

Bosch Premium Alternators are remanufactured, built, and tested to deliver consistent electrical performance and reliability. The AL0831X uses a 6S pulley type, 64 mm outside pulley diameter, and a 150-amp output rating to support the vehicle’s charging demands. This Bosch AL0831X alternator is listed for Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, and Volkswagen Passat models with the correct Bosch or Valeo unit configuration.

This part cross-references Bosch OE numbers 06C903016B and 078903016S for the same application.

Vehicle Fitment

• Fits 2006 Audi A4 Quattro, N/A — To 150 Amp Alternator; Alternator (Remanufactured)
• Fits 2005 Audi A4, N/A — with Valeo Unit; From Chassis # 8H5007801; Alternator (Remanufactured)
• Fits 2002-2005 Audi A4, N/A — with Bosch Unit; Alternator (Remanufactured)
• Fits 2005 Audi A4 Quattro, N/A — To 150 Amp Alternator; with Valeo Unit; From Chassis # 8H5007801; Alternator (Remanufactured)
• Fits 2005 Audi A4 Quattro, N/A — To 150 Amp Alternator; with Bosch Unit; Alternator (Remanufactured)
• Fits 2002-2003 Audi A4 Quattro, N/A — To 150 Amp Alternator; with Bosch Unit; Alternator (Remanufactured)
• Fits 2005 Volkswagen Passat, N/A — To 150 Amp Alternator; with Bosch Unit; Alternator (Remanufactured)
• Fits 2003 Volkswagen Passat, N/A — To 150 Amp Alternator; with Bosch Unit; Alternator (Remanufactured)
• Fits 2004 Audi A4 Quattro, N/A — with Bosch Unit; Alternator (Remanufactured)
• Fits 2004 Audi A6, N/A — with Bosch Unit; Alternator (Remanufactured)
• Fits 2002-2004 Audi A6 Quattro, N/A — with Bosch Unit; Alternator (Remanufactured)
• Fits 2002-2003 Audi A6, N/A — To 150 Amp Alternator; with Bosch Unit; Alternator (Remanufactured)

Common Replacement Reasons

• Battery warning light caused by weak charging output
• Dim lights or fluctuating electrical performance
• Charging-system failure from worn internal components
• Alternator noise related to bearing or pulley wear
• Voltage instability in Audi A4, Audi A6, or Volkswagen Passat charging systems

Installation Notes

Verify the existing alternator brand, amperage rating, pulley style, plug type, and mounting-ear clocking before ordering. This Bosch AL0831X alternator is not one-wire capable and uses an internal regulator layout, so the vehicle’s original charging-system configuration must match the listed fitment notes. Confirm chassis breakpoints and Bosch-versus-Valeo application details on Audi A4 and Audi A4 Quattro models before installation.

Quality Assurance

Bosch remanufactured alternators are designed, built, and tested to meet charging-system performance and reliability requirements. The AL0831X follows Bosch application-specific specifications for proper fitment on listed Audi and Volkswagen vehicles.