Remy 12409 Alternator

Remy 12409 Premium Remanufactured Alternator

The Remy 12409 is a premium remanufactured 12-volt alternator built for select Audi and Volkswagen applications that use a Bosch unit. With a 120-amp amperage rating, internal fan, internal voltage regulator, clockwise rotation, and included pulley, it matches the electrical and mounting requirements of the listed vehicles.

Remy Premium Remanufactured products focus on OE-style fit and function for charging-system replacement. This alternator is a direct option for drivers searching for a Remy 12409 alternator for Audi S4, Audi A4, Audi A4 Quattro, or Volkswagen Passat charging system repair.

Key Features

• 120-amp output for factory-style charging performance
• Remanufactured unit for OE replacement service
• OE manufacturer: Bosch
• 12-volt electrical system
• Internal fan and internal voltage regulator
• Pulley included
• Clockwise rotation
• Part number: 12409

Fitment Details

• Fits 2002 Audi S4, N/A — Bosch Unit; 120 Amps; Premium Remanufactured
• Fits 2000-2001 Audi A4, N/A — Bosch Unit; 120 Amps; Premium Remanufactured
• Fits 2000-2001 Audi A4 Quattro, N/A — Bosch Unit; 120 Amps; Premium Remanufactured
• Fits 2002 Volkswagen Passat, N/A — 120 Amps; Premium Remanufactured
• Fits 1999-2001 Volkswagen Passat, N/A — Bosch Unit; Opt; 120 Amps; Premium Remanufactured

What It Helps Repair

• Battery warning light caused by low charging output
• Dim lights or unstable electrical performance
• Charging-system failure from a worn alternator
• Accessory power issues related to insufficient voltage
• Starting problems caused by weak battery replenishment

Installation Notes and Tips

Verify the OE manufacturer and electrical specifications before installation. Confirm pulley style, rotation direction, and connector fitment against the removed unit on your Audi S4, Audi A4, Audi A4 Quattro, or Volkswagen Passat. Because this is a remanufactured Bosch-style application, matching the original configuration is important for proper charging-system operation.

This part cross-references Bosch-style OE numbers 0-124-515-034 and 06B-903-016F for the same application.

Quality Assurance

Remy Premium Remanufactured parts are built as OE-style replacement components for charging and starting systems. The Remy 12409 alternator is remanufactured to serve the listed Audi and Volkswagen applications with the specified 120-amp output and internal regulation.