Bosch AL0188N Alternator

Bosch AL0188N Alternator Overview

The Bosch AL0188N is a new 14-volt alternator built for charging-system replacement on select Volkswagen applications. It is a Bosch Premium Alternator engineered and tested for consistent output, dependable operation, and OE-style fitment on vehicles such as the Volkswagen Golf, Jetta, and Beetle.

This Bosch alternator uses an internal regulator, internal fan, clockwise rotation, and a 6-groove pulley. The aluminum case and included pulley support direct replacement service for 90 amp charging-system applications where the original unit matches the listed configuration.

Key Features

• 14-volt alternator with a 90 amp amperage rating
• Internal regulator and internal fan design
• Clockwise rotation
• 6-groove pulley included; 56 mm outside pulley diameter
• Aluminum case and aluminum case material
• New unit from Bosch Premium Alternators
• Plug type 367 with rear-view main mounting ear at 6 o'clock
• External fan included

Product Details

Bosch AL0188N is a new alternator for Volkswagen charging-system service where the original equipment configuration calls for a 90 amp unit. The Bosch Premium Alternators line is built to deliver reliable performance through design, manufacturing, and testing standards focused on electrical stability and long-term service. Part number AL0188N is a direct reference for shoppers searching for a Bosch alternator for Volkswagen Golf, Jetta, or Beetle applications.

This part cross-references Bosch and Valeo OE-style applications for the same vehicle coverage. Search terms such as Bosch AL0188N alternator, Volkswagen Jetta alternator replacement, and Volkswagen Beetle 90 amp alternator help identify the correct charging component for the listed fitments.

Vehicle Fitment

• Fits 2010 Volkswagen Golf City, N/A, to 90 amp alternator; with Bosch unit.
• Fits 2010 Volkswagen Golf City, N/A, to 90 amp alternator; with Valeo unit.
• Fits 2010 Volkswagen Jetta, N/A.
• Fits 2007 Volkswagen Jetta, N/A.
• Fits 2004-2007 Volkswagen Beetle, N/A, to 90 amp alternator.
• Fits 2001-2006 Volkswagen Golf, N/A, to 90 amp alternator.
• Fits 1999-2005 Volkswagen Beetle, N/A, to 90 amp alternator; with Bosch unit.
• Fits 2001-2005 Volkswagen Beetle, N/A, to 90 amp alternator; with Valeo unit.
• Fits 1998 Volkswagen Beetle, N/A, to 90 amp alternator; with Valeo unit.
• Fits 1999-2005 Volkswagen Jetta, N/A, to 90 amp alternator; with Valeo unit.
• Fits 1999-2005 Volkswagen Jetta, N/A, to 90 amp alternator; with Bosch unit.
• Fits 2005 Volkswagen Jetta, N/A, standard; to 90 amp alternator.
• Fits 2003-2004 Volkswagen Beetle, N/A, standard; to 70 amp alternator.
• Fits 1999-2004 Volkswagen Golf, N/A, to 90 amp alternator; with Bosch unit.
• Fits 1999-2004 Volkswagen Golf, N/A, to 90 amp alternator; with Valeo unit.
• Fits 2004 Volkswagen R32, N/A, to 90 amp alternator; with Valeo unit.
• Fits 2004 Volkswagen R32, N/A, to 90 amp alternator; with Bosch unit.
• Fits 2001-2002 Volkswagen Jetta, N/A, to 90 amp alternator; with Hitachi unit.
• Fits 2002 Volkswagen Jetta, N/A, to 90 amp alternator.
• Fits 1999-2001 Volkswagen Beetle, N/A, to 90 amp alternator; with Valeo unit; with marking # 047 903 018AX.
• Fits 1999 Volkswagen Beetle, N/A, to 90 amp alternator; with Valeo unit; with marking # 030 903 023JX; with marking # 038 903 018.
• Fits 1999 Volkswagen Beetle, N/A, to 90 amp alternator; with Valeo unit; with marking # 038 903 018A; with marking # 037 903 119A.
• Fits 1998 Volkswagen Beetle, N/A, to 90 amp alternator; with Bosch unit; from chassis # 024256.

Common Replacement Symptoms

• Battery warning light or charging-system warning on the dash
• Low charging voltage at the battery
• Dim headlights or unstable electrical output
• Battery not maintaining charge during normal driving
• Alternator noise or charging failure on Volkswagen Golf, Jetta, or Beetle models

Installation Notes

Verify the original alternator’s amperage, pulley style, plug type, rotation direction, and regulator configuration before installation. This Bosch AL0188N uses a 6-groove pulley, internal regulator, and plug type 367, so matching the removed unit to the listed specifications is important for proper installation on Volkswagen charging systems.

Confirm vehicle-specific fitment details for your Volkswagen Golf, Jetta, or Beetle application, especially on models that list Bosch, Valeo, or Hitachi unit references. Compare the mounting ear orientation and pulley dimensions to the original alternator before final assembly.

Quality Assurance

Bosch Premium Alternators are designed, built, and tested to support reliable electrical performance and consistent operation in replacement service. The AL0188N is a new alternator, not remanufactured, and is produced to meet the specifications listed for the confirmed Volkswagen applications.