Bosch AL660N Alternator

Bosch AL660N Alternator Overview

The Bosch AL660N is a new 12-volt alternator built for dependable charging performance in a wide range of GM vehicles. It features a 105-amp rating, clockwise rotation, an external fan, and a 6-groove pulley for applications that require this specific belt setup.

Compatible With Buick Skylark, Oldsmobile Achieva, Pontiac Grand Am, Chevrolet S10, and other listed applications, this Bosch Premium Alternator is designed and tested for consistent electrical output and reliable operation. The AL660N part number is also a useful reference when verifying replacement fitment.

Key Features

• 12-volt alternator with a 105-amp amperage rating
• New unit with aluminum case and aluminum case color
• Clockwise rotation with external fan included
• 6-groove pulley included; 62 mm outside pulley diameter
• Internal regulator type with external regulator included
• Plug type 310 with rear-view plug clock position at 11 o’clock
• One-wire capable: No
• Bosch Premium Alternators are built and tested for performance and reliability

Product Details

The Bosch Brand Line Alternator (New) focuses on replacement charging components for vehicles that need a direct-fit alternator with the correct pulley, plug configuration, and output rating. This AL660N uses a 6S pulley type and is specified for applications that call for a 105-amp alternator, while also covering select lower-amp fitments noted in the vehicle list. The Bosch AL660N is a practical choice when replacing a worn charging unit on GM cars and trucks from the late 1980s through the mid-1990s.

This part cross-references OE-style part numbers such as 10463013 and 10463169 for the same application.

What It Helps Fix

• Battery warning light caused by alternator output loss
• Low charging voltage at idle or under electrical load
• Dim headlights and weak accessory performance
• Intermittent charging from worn internal components
• Noise or belt issues related to a failing alternator pulley assembly

Installation Notes

Verify the vehicle’s original amperage, plug type, pulley groove count, rotation direction, and mounting-ear orientation before installation. This alternator uses a plug clock rear view main mounting ear at 6 o’clock and is not one-wire capable. Confirm belt alignment and electrical connector match before final tightening, especially on 1987-1995 Buick Skylark, 1987-1993 Chevrolet S10, and 1988-1991 Pontiac Grand Am applications.

• Fits 1995 Buick Skylark, N/A
• Fits 1988-1991 Buick Skylark, N/A
• Fits 1992-1995 Oldsmobile Achieva, N/A
• Fits 1992-1995 Pontiac Grand Am, N/A
• Fits 1987-1993 Chevrolet S10, N/A
• Fits 1991-1993 GMC Sonoma, N/A
• Fits 1987-1992 Buick Century, N/A
• Fits 1987-1992 Chevrolet Camaro, N/A
• Fits 1990-1992 Chevrolet Lumina, N/A
• Fits 1987-1992 Oldsmobile Cutlass Ciera, N/A
• Fits 1987-1992 Oldsmobile Cutlass Cruiser, N/A
• Fits 1987-1992 Pontiac Firebird, N/A
• Fits 1988-1991 Oldsmobile Cutlass Calais, N/A
• Fits 1991 Oldsmobile Cutlass Supreme, N/A
• Fits 1987-1991 Pontiac 6000, N/A
• Fits 1988-1991 Pontiac Grand Am, N/A
• Fits 1990-1991 Pontiac Grand Prix, N/A
• Fits 1987-1990 Chevrolet Astro, N/A
• Fits 1987-1990 Chevrolet Celebrity, N/A
• Fits 1987-1990 GMC S15, N/A
• Fits 1987-1990 GMC Safari, N/A
• Fits 1990 Oldsmobile Cutlass Supreme, N/A
• Fits 1987-1989 Chevrolet Camaro, N/A
• Fits 1987-1989 Chevrolet S10, N/A
• Fits 1987-1989 Pontiac Firebird, N/A
• Fits 1987-1988 Buick Century, N/A
• Fits 1987-1988 Chevrolet S10 Blazer, N/A
• Fits 1987-1988 GMC S15 Jimmy, N/A
• Fits 1987 Oldsmobile Calais, N/A

Quality Assurance

Bosch Premium Alternators are designed, built, and tested to deliver consistent performance and reliability. The AL660N is a new alternator, not remanufactured, and is built with the specifications needed for the listed GM applications.