Bosch AL0803X Alternator

Bosch Remanufactured Alternator for Audi and Volkswagen

The Bosch AL0803X is a remanufactured 12-volt alternator built for charging-system service on select Audi and Volkswagen applications. It is specified for 120 amp output, clockwise rotation, and a 6-groove pulley setup, with internal fan and internal regulator design details that match the listed OE-style configuration.

Bosch Premium Alternators are remanufactured, tested charging components built to deliver consistent electrical performance and dependable operation. For drivers searching for a Bosch AL0803X alternator for Audi A4, Audi A6, or Volkswagen Passat applications, this unit is built around the fitment and electrical specifications shown below.

Key Features

• Remanufactured Bosch alternator, part number AL0803X
• 12-volt charging system with 120 amp amperage rating
• Clockwise rotation with internal fan design
• Internal regulator configuration
• 6-groove pulley included, 65 mm outside pulley diameter
• Aluminum case and aluminum case material
• External fan included and external regulator included as listed
• Fits listed Audi and Volkswagen applications with Valeo unit references where noted

Detailed Description

The Bosch AL0803X remanufactured alternator is designed for charging-system replacement on select 1999-2005 Audi and Volkswagen vehicles. Fitment includes 1999-2001 Audi A6 and A6 Quattro, 2000-2001 Audi A4 and A4 Quattro, 2000-2002 Audi S4, 2001-2002 Audi Allroad Quattro, 2002-2003 Audi A6 Quattro, and 1999-2005 Volkswagen Passat applications with the listed Valeo-unit and amperage notes. This part cross-references Bosch 06B903016G and 078903016H for the same application.

Use this Bosch AL0803X when replacing a worn alternator on Audi A4, Audi A6, or Volkswagen Passat charging systems that require the specified 120 amp, 12-volt, clockwise-rotation configuration. The remanufactured design is intended to restore stable charging output and proper electrical system operation in vehicles that show the exact fitment notes listed here.

What It Helps Fix

• Battery warning light caused by alternator output loss
• Low charging voltage at idle or under load
• Dim lights or fluctuating electrical performance
• Battery drain related to charging-system failure
• Charging issues on Audi and Volkswagen vehicles with the listed Valeo-unit applications

Installation Notes and Tips

• Verify the vehicle year, engine application, and alternator notes before ordering.
• Match the plug type, plug clock position, pulley style, and rotation direction to the original unit.
• Confirm the vehicle uses the listed 120 amp alternator configuration and Valeo-unit notes where specified.
• Inspect the belt, tensioner, and charging connections during alternator replacement.
• Clear charging-system fault codes and verify charging voltage after installation.

Quality Assurance

Bosch remanufactured alternators are built, tested, and inspected to meet charging-system performance requirements for the listed applications. The AL0803X is produced as a remanufactured electrical component for direct replacement use in the specified Audi and Volkswagen fitments.