Bosch AL0812N Alternator

Bosch AL0812N Alternator for Porsche

The Bosch AL0812N is a new 14-volt alternator built for charging-system service on select Porsche applications. It is engineered with an internal regulator, internal fan, and a 120-amp rating to support stable electrical output in demanding driving conditions.

Compatible with 2001-2004 Porsche 911 and 2000-2004 Porsche Boxster, this Bosch Premium Alternator line focuses on measured performance and reliability for direct replacement needs. The AL0812N includes a pulley and uses a 6-groove belt interface with clockwise rotation.

Key Features

• Brand: Bosch Alternator (New)
• Part number: AL0812N
• 14-volt charging system output
• 120-amp amperage rating
• Internal regulator and internal fan
• Negative ground design
• Single pivoted lever mounting configuration
• 6-groove pulley included
• Decoupled or clutch pulley design
• Aluminum case with silver finish

Detailed Description

Bosch Premium Alternators are built and tested for consistent charging performance and dependable operation. The AL0812N uses a short mounting configuration, clockwise rotation, and a 52.6 mm outside pulley diameter, with a plug clock position of 10 o’clock from the rear view main mounting ear at 6 o’clock. The unit is new, brushless, and configured for a 6S pulley/belt type.

This Bosch AL0812N alternator is a direct-fit charging component for Porsche 911 and Porsche Boxster applications listed below. If you are replacing a worn alternator on a 2001-2004 Porsche 911 or a 2000-2004 Porsche Boxster, this part number provides the specified electrical and mounting configuration for those vehicles. This part cross-references Porsche 99660301202 and 99660301206 for the same application.

What It Helps Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim lights or unstable electrical performance
• Noise or wear related to alternator pulley operation
• Charging-system failure on Porsche 911 and Boxster models

Installation Notes and Tips

Verify the mounting style, plug clock position, pulley type, and belt groove count before installation. Confirm the vehicle uses the listed 14-volt, negative-ground charging setup and compare the original alternator housing and connector layout to Bosch AL0812N before removal of the old unit. Check belt condition and alignment during replacement to help maintain proper charging-system operation.

Quality Assurance

Bosch Premium Alternators are designed, built, and tested to deliver reliable performance in charging-system service. The AL0812N is a new alternator built to Bosch specifications for the listed Porsche applications.