Bosch AL3309X Alternator

Bosch AL3309X Remanufactured Alternator

The Bosch AL3309X remanufactured alternator is built for 12-volt charging systems that need stable output and dependable electrical performance. It is a 100-amp unit with an internal fan, internal regulator, and included pulley for direct replacement service on select Lexus RX300 and Toyota Highlander applications.

Bosch Premium Alternators are remanufactured, then built and tested to meet demanding performance and reliability expectations. For drivers searching for a remanufactured alternator for Lexus RX300 or Toyota Highlander charging system repair, AL3309X provides the key OE-style specifications needed for a proper match.

Key Features

• 12-volt remanufactured alternator
• 100-amp amperage rating
• Internal fan design
• Internal regulator included
• External regulator included
• Pulley included with 6-groove, 6S belt type
• Clockwise rotation
• Aluminum case and aluminum case material
• Plug type 312 with rear-view plug clock at 6 o’clock

Detailed Product Overview

The Bosch AL3309X alternator is engineered for vehicles that require a 100-amp charging output and a 12-volt electrical system. Its internal fan and internal regulator support consistent charging performance, while the included pulley and 6-groove configuration help match the original belt drive setup. This remanufactured Bosch alternator is a practical replacement choice for 2000-2003 Lexus RX300 and 2001-2003 Toyota Highlander models listed below.

This part cross-references ND 2706020110, 2706020140, and 2706020200 for the same application.

Vehicle Fitment

• Fits 1999 Lexus RX300, N/A, to 120 amp alternator.
• Fits 2000 Lexus RX300, N/A, to 100 amp alternator.
• Fits 2001-2003 Lexus RX300, N/A, to 100 amp alternator; without towing package.
• Fits 2001-2003 Toyota Highlander, N/A, to 100 amp alternator.

Common Charging System Issues

• Battery warning light stays on
• Low charging voltage at the battery
• Dim headlights or unstable electrical output
• Alternator noise from worn internal components
• Charging failure after alternator wear or regulator issues

Installation Notes and Tips

Verify the vehicle’s amperage requirement, plug type, pulley groove count, rotation direction, and mounting configuration before installation. Confirm the application notes for Lexus RX300 models, including the 2001-2003 without towing package requirement and the 1999-2000 amperage differences. Inspect the belt condition, electrical connectors, and charging circuit before final startup.

Quality Assurance

Bosch Premium Alternators are remanufactured, built, and tested to support reliable charging performance in service. The AL3309X is packaged as a boxed replacement alternator for select Lexus and Toyota applications.