Bosch AL3399X Alternator

Bosch AL3399X Remanufactured Alternator

The Bosch AL3399X is a remanufactured 12-volt alternator built for steady charging performance in select Toyota and Lexus applications. It is a direct-fit charging component for vehicles that need a 100 amp alternator with an internal regulator and clockwise rotation.

Key Features

• Remanufactured Bosch alternator for electrical charging system repair
• 12-volt, 100 amp output
• Internal fan and internal regulator
• Clockwise rotation
• Pulley included with 7-groove design
• Aluminum case and aluminum housing construction
• Plug type 917 with rear-view plug clocking at 6 o’clock
• 7S-DP pulley and 53.6 mm outside pulley diameter

Product Details

Bosch Premium Alternators are engineered, assembled, and tested to deliver consistent charging performance and dependable operation. The AL3399X alternator is a remanufactured replacement for vehicles that require a 100 amp unit, and it is built with an internal regulator, internal fan, and included pulley for OE-style service replacement. This part cross-references Bosch applications such as 2706031081 and 2706031082 for the same application.

Compatible With select Toyota Highlander, Toyota RAV4, Toyota Camry, and Lexus RX350 models, this Bosch AL3399X alternator supports charging-system restoration on Japan-built vehicles and specific non-towing RAV4 applications. It is a practical replacement when the original alternator no longer maintains proper battery charge or system voltage.

What This Alternator Helps Solve

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim lights or electrical instability from weak charging performance
• Noise or wear related to a failing alternator assembly
• Charging-system faults on select Toyota and Lexus vehicles

Installation Notes and Fitment

Fits 2010-2012 Toyota Highlander, N/A, Japan Built; To 100 Amp Alternator. Fits 2010-2012 Toyota RAV4, N/A, Japan Built; To 100 Amp Alternator; without Towing Package. Fits 2007-2011 Toyota Camry, N/A, Japan Built; To 100 Amp Alternator. Fits 2009 Lexus RX350, N/A, Japan Built; To 100 Amp Alternator. Fits 2008-2009 Toyota Highlander, N/A; To 100 Amp Alternator. Fits 2009 Toyota RAV4, N/A; To 100 Amp Alternator; without Towing Package. Fits 2007-2008 Lexus RX350, N/A; To 100 Amp Alternator.

Verify plug type 917, pulley configuration, amperage rating, and vehicle build details before installation. Confirm the application is for a 100 amp alternator and review the notes for Japan-built or without towing package requirements where listed. The AL3399X is a remanufactured electrical component, so proper belt alignment and charging-system inspection are recommended during replacement.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet charging-system performance and reliability expectations for service replacement use.