MPA Electrical 15123 Alternator

Remanufactured Bosch 120 Amp Alternator

MPA Electrical Part Number 15123 is a remanufactured 12-volt alternator built for Bosch-equipped charging systems. It delivers 120 amps, uses an internal fan and internal regulator, rotates clockwise, and is supplied without a pulley for the specified application.

This remanufactured product line focuses on OE-style electrical replacement parts for import vehicles, with specifications matched to the original Bosch alternator configuration. Part number 15123 is a direct-fit option for select Audi A4, A4 Quattro, A6 Quattro, S4, and Volkswagen Passat applications that use a 120 amp Bosch alternator.

• 120 amp output for Bosch charging-system applications
• 12-volt alternator with internal regulator
• Internal fan design
• Clock position: 7:30
• Clockwise rotation
• Without pulley
• Remanufactured by MPA Electrical

Vehicle Fitment

• Fits 2000-2005 Volkswagen Passat, N/A; compatible with vehicles equipped with a 120 amp alternator from Bosch.
• Fits 2004 Audi A6 Quattro, N/A.
• Fits 2002-2003 Audi A6 Quattro, N/A; with Bosch alternator.
• Fits 2000-2002 Audi S4, N/A; with Bosch alternator.
• Fits 2002 Volkswagen Passat, N/A; with 120 amp Bosch.
• Fits 2001 Audi A4, N/A; compatible with vehicles equipped with a 120 amp alternator from Bosch.
• Fits 2000-2001 Audi A4, N/A; optional, with 120 amp Bosch alternator.
• Fits 2001 Audi A4 Quattro, N/A; compatible with vehicles equipped with a Bosch 120 amp alternator.
• Fits 1999-2001 Volkswagen Passat, N/A; from chassis 3B-X-150000, with 120 amp Bosch.
• Fits 2000 Audi A4, N/A; with 120 amp Bosch alternator.
• Fits 2000 Audi A4 Quattro, N/A; with 120 amp Bosch alternator.
• Fits 1999 Volkswagen Passat, N/A; from chassis 3B-X-150000, optional, with 120 amp Bosch alternator.

Common Replacement Reasons

• Battery warning light or charging-system fault
• Low charging output at idle or under load
• Electrical accessories dimming during operation
• Alternator noise from worn internal components
• Failure on Bosch 120 amp charging-system applications

Installation Notes

Verify the original alternator matches the Bosch 120 amp configuration, 12-volt system, clockwise rotation, internal regulator, and 7:30 clock position before installation. This unit is supplied without a pulley, so the existing application setup must match that specification. Confirm vehicle fitment by year, make, model, and chassis notes before ordering.

Quality Assurance

MPA Electrical remanufactures this alternator to restore charging-system function for select Audi and Volkswagen applications. Cross-reference part numbers include Bosch 13951 and BBB Industries 13922.