Bosch AL3331X Alternator

Bosch Remanufactured Alternator for Toyota Highlander

The Bosch AL3331X is a remanufactured 12-volt alternator built for charging-system replacement on select Toyota Highlander applications. It is specified for 150-amp output and uses an internal fan, internal regulator, and a 7-groove pulley for proper belt engagement.

Compatible With 2009 Toyota Highlander and 2010-2012 Toyota Highlander, Japan-built models with a 150-amp alternator. This Bosch alternator is a direct-fit electrical replacement for Highlander charging-system service where OE-style fitment and output are required.

Key Features

• Bosch remanufactured alternator, part number AL3331X
• 12-volt charging system with 150-amp amperage rating
• Internal fan and internal regulator design
• 7-groove pulley included for belt drive applications
• Clockwise rotation
• Aluminum case construction
• Plug type 917 with rear-view plug clock position at 12 o’clock
• External regulator included

Product Details

Bosch Premium Alternators are remanufactured, tested, and built to deliver dependable charging performance and consistent operation. The AL3331X is engineered for Toyota Highlander charging-system service and is listed for 2009 Highlander and 2010-2012 Highlander Japan-built vehicles equipped with a 150-amp alternator. If you are replacing a failing alternator on a Toyota Highlander, this unit provides the specified electrical output, pulley configuration, and connector layout needed for the application.

This part cross-references ND 2706036040 for the same application.

What It Helps Solve

• Battery warning light caused by alternator output loss
• Low-voltage charging conditions during driving
• Dim lights or electrical instability from weak charging performance
• Battery drain after the vehicle is running
• Charging-system failure on Toyota Highlander models with a 150-amp alternator

Installation Notes and Tips

• Verify the vehicle is a Japan-built Toyota Highlander before ordering for 2010-2012 applications.
• Confirm the existing alternator is a 150-amp unit and matches the 7-groove pulley setup.
• Check connector style, plug clock position, and mounting ear orientation against the removed unit.
• Inspect the belt, tensioner, and battery condition during alternator replacement.
• Clear charging-system fault codes after installation and verify charging voltage at the battery.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet charging-system performance requirements for the listed application. The AL3331X reflects Bosch’s focus on fit, electrical output, and reliability for replacement use.