MPA Electrical 13851 Alternator

Remanufactured Bosch 90 Amp Alternator

MPA Electrical Part Number 13851 is a remanufactured 12-volt alternator built for Bosch-equipped Volkswagen charging systems. It uses an internal regulator, internal fan, clockwise rotation, and a 6-groove serpentine clutch pulley to match the specified OE-style setup.

This remanufactured alternator is a direct-fit replacement for select Volkswagen Golf, Jetta, and Beetle applications with a Bosch 90 amp alternator. The MPA Electrical 13851 alternator is specified for vehicles that require a 1:00 clock position and the listed pulley configuration.

Key Features

• 90 amp output for 12-volt charging systems
• Bosch manufacturer specification
• Internal voltage regulator
• Internal cooling fan
• 6-groove serpentine clutch pulley
• Clockwise rotation with 1:00 clock position
• Remanufactured for OE-style replacement use

Detailed Description

MPA Electrical 13851 is a remanufactured alternator for Volkswagen models equipped with a Bosch 90 amp unit. It is built with the correct electrical and mounting-related specifications, including 90 amps, 12 volts, internal regulation, and the listed pulley and rotation details. For buyers searching for a Volkswagen Golf alternator, Volkswagen Jetta alternator, or Volkswagen Beetle alternator, this part number 13851 matches the documented application data for those Bosch-based charging systems.

Brand Line: Remanufactured indicates this unit has been rebuilt for replacement service rather than supplied as a new assembly. That makes it a practical option when replacing a worn charging component on a Bosch-equipped Volkswagen Golf, Jetta, or Beetle.

This part cross-references Dorman - HELP 13851 for the same application.

What It Helps Address

• Battery warning light caused by alternator output loss
• Low charging voltage in Bosch 90 amp systems
• Dim lights or electrical instability from weak charging performance
• Charging failure from worn internal regulator or fan components
• Fitment issues when replacing a Volkswagen alternator with the wrong pulley or clock position

Installation Notes and Tips

• Verify the vehicle uses a Bosch 90 amp alternator before ordering.
• Confirm the 6-groove serpentine clutch pulley and 1:00 clock position match the original unit.
• Check connector, bracket, and belt alignment against the removed alternator before installation.
• Inspect the battery and charging circuit after installation to confirm proper system voltage.

Quality Assurance

MPA Electrical remanufactured components are built to match the listed application specifications for direct replacement use. Part Number 13851 is cataloged for select 1998-2006 Volkswagen Golf, 1998-2001 Volkswagen Beetle, and 2000-2005 Volkswagen Jetta applications with Bosch 90 amp alternator setups.

• Fits 2006 Volkswagen Golf, N/A, w/ Bosch 90 amp alt.; Remanufactured
• Fits 2005 Volkswagen Golf, N/A, w/ Bosch 90 amp alt., w/ 6S clutch pulley; Remanufactured
• Fits 2004 Volkswagen Golf, N/A, w/ Bosch 90 amp alt.; Remanufactured
• Fits 2003 Volkswagen Golf, N/A, Standard, w/ 90 amp Bosch alt.; Remanufactured
• Fits 2002 Volkswagen Golf, N/A, w/ Bosch 90 amp alt., w/ 6S Clutch Pulley; Remanufactured
• Fits 1999-2001 Volkswagen Golf, N/A, w/ Bosch 90 amp alt.; Remanufactured
• Fits 2000-2005 Volkswagen Jetta, N/A, w/ Bosch 90 amp alt.; Remanufactured
• Fits 1999-2001 Volkswagen Beetle, N/A, w/ Bosch 90 amp alt.; Remanufactured
• Fits 1998 Volkswagen Beetle, N/A, From Chassis 1C-W-020000, w/ 90 amp alt.; Remanufactured