Bosch AL655N Alternator

Bosch AL655N Alternator Overview

The Bosch AL655N is a new 12-volt alternator built for charging-system service on select GM and Pontiac applications. It is a 100-amp unit with an aluminum case, external fan, included pulley, and internal regulator for direct replacement use where the original alternator matches the listed specifications.

Bosch Alternator (New) products are part of Bosch’s premium alternator line, engineered and tested for consistent electrical output and dependable operation in demanding daily driving conditions.

• 12-volt alternator with 100-amp amperage rating
• New construction with aluminum case and aluminum case color
• Internal regulator type with external regulator included
• External fan included for cooling support
• 6-groove pulley included; 52 mm outside pulley diameter
• Clockwise rotation direction
• Plug type 310 with rear-view plug clock at 7 o’clock
• One-wire capable: No

Detailed Product Description

The Bosch AL655N alternator is built for vehicles that require a 12-volt charging system and a 100-amp output rating. Its aluminum housing helps keep weight down while supporting heat management, and the included 6-groove pulley is configured for belt-driven accessory systems that match the OE-style layout. This part number, AL655N, is listed with interchange references for select OE applications and is intended for direct-fit replacement where the original unit matches the electrical and mounting specifications.

Compatible With 1985-1994 Chevrolet Cavalier, 1987-1993 Chevrolet Corsica, 1990 Chevrolet Celebrity, 1985-1986 Chevrolet Camaro, 1991-1993 Chevrolet Lumina APV, 1986-1990 Chevrolet P30, 1987-1988 Cadillac Cimarron, 1988-1989 Buick Century, 1988-1989 Oldsmobile Cutlass Ciera, 1988-1989 Oldsmobile Cutlass Cruiser, and select Pontiac and GMC applications including Pontiac Sunbird, Pontiac 6000, Pontiac Tempest, Pontiac Trans Sport, Pontiac Firebird, Oldsmobile Silhouette, Oldsmobile Firenza, GMC P2500, GMC P3500, and Chevrolet P20/P2500/P3500 heavy-duty configurations. This part cross-references OE numbers such as 1101258 and 10463040 for the same application.

Common Problems This Part Can Address

• Low battery charging caused by a worn alternator
• Dim lights or electrical instability at idle
• Battery warning light triggered by charging-system failure
• Noise from a failing alternator bearing or pulley assembly
• Charging output loss on high-demand electrical systems

Installation Notes and Tips

Verify the original alternator’s amperage rating, plug type, pulley groove count, rotation direction, and mounting-ear orientation before installation. This AL655N uses a clockwise rotation, external fan, and plug clock position of 7 o’clock from the rear view, so matching the OE configuration is important for proper fitment. Confirm belt alignment and electrical connector compatibility on Chevrolet Cavalier, Pontiac Sunbird, and related applications before final assembly.

Quality Assurance

Bosch designs, builds, and tests its premium alternators to support reliable performance and consistent charging output. The AL655N is a new alternator, not remanufactured, and is manufactured to meet the specifications listed for the covered applications.